Update LibreJS to 7.20.2.

7 files changed, 5680 insertions, 5728 deletions

diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/manifest.mf b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/manifest.mf
index 61b102f..c350c6d 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/manifest.mf
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/manifest.mf
@@ -2,18 +2,13 @@ Manifest-Version: 1.0
 
 Name: bundle.js
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: UX8e8HkVo91zkZYmBQ+kfiCpwPs=
-SHA256-Digest: oRV4t3crcm80cDnjNgMlG8DeZ5Iz94FOUgzzZRc5MN8=
+SHA1-Digest: uxmAOku9zQX8OAzg7q9Nh6HKX9w=
+SHA256-Digest: aNfuVhkXCwnJxkehSx4wY1sKBQM2/Yce8s9WwQjNwuQ=
 
 Name: manifest.json
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: q1V095aZE9i6KL/7ZZBa5gb9v88=
-SHA256-Digest: Bw3sK9ORldivFQKCTz3svlGeKChsrBTsEBpWkT2norc=
-
-Name: icons/librejs.png
-Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: Q9vvlNA4dFCgNvsckbkM3AcbqC4=
-SHA256-Digest: iZ50DcoVMy8qEArQPbLCQyuf/vGeVkTS6Ja8K/E1nvU=
+SHA1-Digest: gL7WTQ0XMNQH1kswMdEaIaGR0vQ=
+SHA256-Digest: Y10F58iDAXlfhJOxNUnD8EGzP2qBBRaAlRQeA/WhvUQ=
 
 Name: common/Storage.js
 Digest-Algorithms: SHA1 SHA256
@@ -25,60 +20,60 @@ Digest-Algorithms: SHA1 SHA256
 SHA1-Digest: V6rYjMO15exXtS8Gsk6qzutJHzY=
 SHA256-Digest: BvUhNJgjyuD4MGFa3Ga2gEDunpwbn8PiDt1zeG9SJRs=
 
-Name: html/common.css
+Name: content/externalLicenseChecker.js
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: VxWUQ31bhir4PZrxeCczHaTFB/Q=
-SHA256-Digest: XtMPewrOTJxncjL2YsgherVtMMFCHAv211GoiErGwgU=
+SHA1-Digest: sALK4fTpRtqwMC6qj+jdlEA0kw8=
+SHA256-Digest: xsUzqSCu6kx0k1ZLIMBfLNO96JDUfwnTPr1sw7grUUs=
 
-Name: html/background-panel.png
+Name: content/contactFinder.js
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: I7A+/TQ6qxT/KL1l28vAX/Hk6Vc=
-SHA256-Digest: 8QXq/xEzAlvUjmlnoLZsSUNRzJVMlXfxvHXg+CjQCeo=
+SHA1-Digest: 6kejS+GJk1afxi0q0xhCf61QKIw=
+SHA256-Digest: 5sJk/9cmVNxCQAk9tFUuzXTZceDI7hXlRkUY2OqWL1Q=
+
+Name: content/dialog.css
+Digest-Algorithms: SHA1 SHA256
+SHA1-Digest: OtHx7b2GxD8MYhJ2WJ6+FESRLt0=
+SHA256-Digest: PmP1jGEKgeLl698KLlhzFHKr1kKuXGjs2fekHWfri40=
+
+Name: content/overlay.css
+Digest-Algorithms: SHA1 SHA256
+SHA1-Digest: HiornR2qULIjaGkBgK9+4mo6zhE=
+SHA256-Digest: QpbfWaEXXtxpCOA7o11c0plSmemhdrEp/AJF8uegrME=
 
 Name: html/README
 Digest-Algorithms: SHA1 SHA256
 SHA1-Digest: KSboZB1+wr79Fe37Ilvk9wHbFUI=
 SHA256-Digest: woimzHpj0kwEyX4pkh/OEWZg+nZMy//j3FFaxIUUSqE=
 
-Name: html/fastclick.js.LICENSE.txt
-Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: 3NW2tDCV2ekDU6KLCcsmnejUg44=
-SHA256-Digest: WlJkIStdkPCxwO5I5JifqzzUw+tbwt64+8VHemoLD+Q=
-
-Name: html/librejs-title.png
+Name: html/background-panel.png
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: 4wV1hpHAYZrwT7thfw9W3ih9nUI=
-SHA256-Digest: kXQZs049GoebbjgWwvRx/lBKFzTvi8J2dKE8PJC3pX0=
+SHA1-Digest: I7A+/TQ6qxT/KL1l28vAX/Hk6Vc=
+SHA256-Digest: 8QXq/xEzAlvUjmlnoLZsSUNRzJVMlXfxvHXg+CjQCeo=
 
-Name: html/mobile.js
+Name: html/common.css
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: Rlsaps0mwLl0HJwPkcAwP10WUds=
-SHA256-Digest: DjCIuaq2tQRZSL8nZCAZo3XhZyT0H8oNsVoUBwbSK2Q=
+SHA1-Digest: VxWUQ31bhir4PZrxeCczHaTFB/Q=
+SHA256-Digest: XtMPewrOTJxncjL2YsgherVtMMFCHAv211GoiErGwgU=
 
 Name: html/fastclick.js
 Digest-Algorithms: SHA1 SHA256
 SHA1-Digest: tISBJl2XE/ZIcrZZfbYgvpzY+bM=
 SHA256-Digest: tIKdxXxboR98bjgJv5N92HioBFE3Gn8+BCPHL74ogdA=
 
-Name: html/preferences_panel/pref.js
-Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: ESzd1j32pAud0f8ipLBwCksR55Y=
-SHA256-Digest: cAFneDMuCfs9IGrXIndPgcV86NktQquhWuTjvSpKpvU=
-
-Name: html/preferences_panel/preferences_panel.html
+Name: html/fastclick.js.LICENSE.txt
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: p4bT3dvEpLwlx+HSbEjaN/m/sWM=
-SHA256-Digest: 5ulelouZj4FWFWe6RKw5CEOOMcrY8M8uc+O5xLM5mTg=
+SHA1-Digest: 3NW2tDCV2ekDU6KLCcsmnejUg44=
+SHA256-Digest: WlJkIStdkPCxwO5I5JifqzzUw+tbwt64+8VHemoLD+Q=
 
-Name: html/preferences_panel/prefs.css
+Name: html/librejs-title.png
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: pcsCRYBKnwUyTcRWuvjCTuQ/1ow=
-SHA256-Digest: tka3B4VXzE/NnqA5QUSqUWqMGtGsjOyYaqrbB/mISdk=
+SHA1-Digest: 4wV1hpHAYZrwT7thfw9W3ih9nUI=
+SHA256-Digest: kXQZs049GoebbjgWwvRx/lBKFzTvi8J2dKE8PJC3pX0=
 
-Name: html/display_panel/content/panel-styles.css
+Name: html/mobile.js
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: f2hf4t1D4PAI9c2BbxoBQd9kcko=
-SHA256-Digest: xD1r4fotCgzI4D6L2wvcPgmQYnu2CtmkpH4oVeK6Ci0=
+SHA1-Digest: Rlsaps0mwLl0HJwPkcAwP10WUds=
+SHA256-Digest: DjCIuaq2tQRZSL8nZCAZo3XhZyT0H8oNsVoUBwbSK2Q=
 
 Name: html/display_panel/content/display-panel.html
 Digest-Algorithms: SHA1 SHA256
@@ -90,33 +85,38 @@ Digest-Algorithms: SHA1 SHA256
 SHA1-Digest: lc+II7OjJZLA7hozmKG+HaxCgPw=
 SHA256-Digest: JTgNQC5RwebM4t7GTNuplsr8VVs69v1CtNF82bdda04=
 
-Name: content/externalLicenseChecker.js
+Name: html/display_panel/content/panel-styles.css
+Digest-Algorithms: SHA1 SHA256
+SHA1-Digest: f2hf4t1D4PAI9c2BbxoBQd9kcko=
+SHA256-Digest: xD1r4fotCgzI4D6L2wvcPgmQYnu2CtmkpH4oVeK6Ci0=
+
+Name: html/preferences_panel/preferences_panel.html
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: hMvdvWdSf/w9EvoTCZfaTTeBDWs=
-SHA256-Digest: MrvR4yCtKDVzKOKf2LIef6uTbYctTX3J84QFReMuvgw=
+SHA1-Digest: p4bT3dvEpLwlx+HSbEjaN/m/sWM=
+SHA256-Digest: 5ulelouZj4FWFWe6RKw5CEOOMcrY8M8uc+O5xLM5mTg=
 
-Name: content/overlay.css
+Name: html/preferences_panel/prefs.css
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: HiornR2qULIjaGkBgK9+4mo6zhE=
-SHA256-Digest: QpbfWaEXXtxpCOA7o11c0plSmemhdrEp/AJF8uegrME=
+SHA1-Digest: pcsCRYBKnwUyTcRWuvjCTuQ/1ow=
+SHA256-Digest: tka3B4VXzE/NnqA5QUSqUWqMGtGsjOyYaqrbB/mISdk=
 
-Name: content/dialog.css
+Name: html/preferences_panel/pref.js
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: OtHx7b2GxD8MYhJ2WJ6+FESRLt0=
-SHA256-Digest: PmP1jGEKgeLl698KLlhzFHKr1kKuXGjs2fekHWfri40=
+SHA1-Digest: PlpezUc//2V0kUqshiHShuTmADE=
+SHA256-Digest: I3sWCoPA50yP5oeAEzWK1pIOVkr2nWBhz1d8lyKM+qQ=
 
-Name: content/contactFinder.js
+Name: icons/librejs.png
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: 6kejS+GJk1afxi0q0xhCf61QKIw=
-SHA256-Digest: 5sJk/9cmVNxCQAk9tFUuzXTZceDI7hXlRkUY2OqWL1Q=
+SHA1-Digest: Q9vvlNA4dFCgNvsckbkM3AcbqC4=
+SHA256-Digest: iZ50DcoVMy8qEArQPbLCQyuf/vGeVkTS6Ja8K/E1nvU=
 
 Name: META-INF/cose.manifest
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: dOTou/GnmH/fxsN+xsa7ZKthrl8=
-SHA256-Digest: H3feTrZEaDntCsDzn+blWnRA3Cl03De1JZp6Yrpv7D8=
+SHA1-Digest: b4hT2yblttyFz/MOBJDTFHkHOGQ=
+SHA256-Digest: FQPvgpW6YlUi+L0UIX1KjNRhkRvyIbff/HCKfJJ/kU0=
 
 Name: META-INF/cose.sig
 Digest-Algorithms: SHA1 SHA256
-SHA1-Digest: yQ7A0hUPhHzQGVtRCo8a2QywnCE=
-SHA256-Digest: au6WGOUDxesSZkPPSr8k6zD5/pfwe4GiN3lkcMsPn8E=
+SHA1-Digest: HD1CifAtveF97UEse+TiEAMZE7Y=
+SHA256-Digest: dUggP7cD29PBsFPFb8LTYnSq1C9w4u/q4HZzRmcZjQ4=
 
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.rsa b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.rsa
index c0ba9b7..a57a0f7 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.rsa
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.rsa
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.sf b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.sf
index d72e4ae..6cd8f26 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.sf
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/META-INF/mozilla.sf
@@ -1,4 +1,4 @@
 Signature-Version: 1.0
-SHA1-Digest-Manifest: mVu/l38a1ubabujxfNw3DDsRqqI=
-SHA256-Digest-Manifest: 7KCXGUQmGNhcqUe5KxSSPdQZpIGmhLYUMr11g4pYDkE=
+SHA1-Digest-Manifest: s1Dlf/XD6Gnqunm5GR6cull2dGQ=
+SHA256-Digest-Manifest: MjfRCwS4KlsNAopVxrYo54ff5BAeuZNrFsN1ieu/3e4=
 
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/bundle.js b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/bundle.js
index 8527080..155cf87 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/bundle.js
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/bundle.js
@@ -638,7 +638,7 @@ if (typeof module === "object") {
   var jssha = require('jssha');
 }
 
-},{"jssha":16}],6:[function(require,module,exports){
+},{"jssha":15}],6:[function(require,module,exports){
 /**
 * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
 *
@@ -1649,7 +1649,7 @@ var check = function(license_text){
 
 module.exports.check = check;
 
-},{"./license_definitions.js":10,"./pattern_utils.js":17}],10:[function(require,module,exports){
+},{"./license_definitions.js":10,"./pattern_utils.js":16}],10:[function(require,module,exports){
 /**
  * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
  * *
@@ -3463,6508 +3463,6460 @@ async function injectContactFinder(tabId){
 
 init_addon();
 
-},{"./bg/ExternalLicenses":1,"./bg/ListManager":2,"./bg/ResponseProcessor":4,"./common/Storage":5,"./common/Test":6,"./fname_data.json":7,"./hash_script/whitelist":8,"./legacy_license_check.js":9,"./licenses.json":11,"acorn":15,"acorn-loose":13}],13:[function(require,module,exports){
+},{"./bg/ExternalLicenses":1,"./bg/ListManager":2,"./bg/ResponseProcessor":4,"./common/Storage":5,"./common/Test":6,"./fname_data.json":7,"./hash_script/whitelist":8,"./legacy_license_check.js":9,"./licenses.json":11,"acorn":14,"acorn-loose":13}],13:[function(require,module,exports){
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('acorn')) :
-	typeof define === 'function' && define.amd ? define(['exports', 'acorn'], factory) :
-	(factory((global.acorn = global.acorn || {}, global.acorn.loose = {}),global.acorn));
-}(this, (function (exports,acorn) { 'use strict';
-
-function noop() {}
-
-var LooseParser = function LooseParser(input, options) {
-  if ( options === void 0 ) options = {};
-
-  this.toks = this.constructor.BaseParser.tokenizer(input, options);
-  this.options = this.toks.options;
-  this.input = this.toks.input;
-  this.tok = this.last = {type: acorn.tokTypes.eof, start: 0, end: 0};
-  this.tok.validateRegExpFlags = noop;
-  this.tok.validateRegExpPattern = noop;
-  if (this.options.locations) {
-    var here = this.toks.curPosition();
-    this.tok.loc = new acorn.SourceLocation(this.toks, here, here);
-  }
-  this.ahead = []; // Tokens ahead
-  this.context = []; // Indentation contexted
-  this.curIndent = 0;
-  this.curLineStart = 0;
-  this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
-  this.inAsync = false;
-  this.inFunction = false;
-};
-
-LooseParser.prototype.startNode = function startNode () {
-  return new acorn.Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null)
-};
-
-LooseParser.prototype.storeCurrentPos = function storeCurrentPos () {
-  return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start
-};
-
-LooseParser.prototype.startNodeAt = function startNodeAt (pos) {
-  if (this.options.locations) {
-    return new acorn.Node(this.toks, pos[0], pos[1])
-  } else {
-    return new acorn.Node(this.toks, pos)
-  }
-};
-
-LooseParser.prototype.finishNode = function finishNode (node, type) {
-  node.type = type;
-  node.end = this.last.end;
-  if (this.options.locations)
-    { node.loc.end = this.last.loc.end; }
-  if (this.options.ranges)
-    { node.range[1] = this.last.end; }
-  return node
-};
-
-LooseParser.prototype.dummyNode = function dummyNode (type) {
-  var dummy = this.startNode();
-  dummy.type = type;
-  dummy.end = dummy.start;
-  if (this.options.locations)
-    { dummy.loc.end = dummy.loc.start; }
-  if (this.options.ranges)
-    { dummy.range[1] = dummy.start; }
-  this.last = {type: acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc};
-  return dummy
-};
-
-LooseParser.prototype.dummyIdent = function dummyIdent () {
-  var dummy = this.dummyNode("Identifier");
-  dummy.name = "✖";
-  return dummy
-};
+  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('acorn')) :
+  typeof define === 'function' && define.amd ? define(['exports', 'acorn'], factory) :
+  (global = global || self, factory((global.acorn = global.acorn || {}, global.acorn.loose = {}), global.acorn));
+}(this, function (exports, acorn) { 'use strict';
+
+  function noop() {}
+
+  var LooseParser = function LooseParser(input, options) {
+    if ( options === void 0 ) options = {};
+
+    this.toks = this.constructor.BaseParser.tokenizer(input, options);
+    this.options = this.toks.options;
+    this.input = this.toks.input;
+    this.tok = this.last = {type: acorn.tokTypes.eof, start: 0, end: 0};
+    this.tok.validateRegExpFlags = noop;
+    this.tok.validateRegExpPattern = noop;
+    if (this.options.locations) {
+      var here = this.toks.curPosition();
+      this.tok.loc = new acorn.SourceLocation(this.toks, here, here);
+    }
+    this.ahead = []; // Tokens ahead
+    this.context = []; // Indentation contexted
+    this.curIndent = 0;
+    this.curLineStart = 0;
+    this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
+    this.inAsync = false;
+    this.inFunction = false;
+  };
 
-LooseParser.prototype.dummyString = function dummyString () {
-  var dummy = this.dummyNode("Literal");
-  dummy.value = dummy.raw = "✖";
-  return dummy
-};
+  LooseParser.prototype.startNode = function startNode () {
+    return new acorn.Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null)
+  };
 
-LooseParser.prototype.eat = function eat (type) {
-  if (this.tok.type === type) {
-    this.next();
-    return true
-  } else {
-    return false
-  }
-};
+  LooseParser.prototype.storeCurrentPos = function storeCurrentPos () {
+    return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start
+  };
 
-LooseParser.prototype.isContextual = function isContextual (name) {
-  return this.tok.type === acorn.tokTypes.name && this.tok.value === name
-};
+  LooseParser.prototype.startNodeAt = function startNodeAt (pos) {
+    if (this.options.locations) {
+      return new acorn.Node(this.toks, pos[0], pos[1])
+    } else {
+      return new acorn.Node(this.toks, pos)
+    }
+  };
 
-LooseParser.prototype.eatContextual = function eatContextual (name) {
-  return this.tok.value === name && this.eat(acorn.tokTypes.name)
-};
+  LooseParser.prototype.finishNode = function finishNode (node, type) {
+    node.type = type;
+    node.end = this.last.end;
+    if (this.options.locations)
+      { node.loc.end = this.last.loc.end; }
+    if (this.options.ranges)
+      { node.range[1] = this.last.end; }
+    return node
+  };
 
-LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () {
-  return this.tok.type === acorn.tokTypes.eof || this.tok.type === acorn.tokTypes.braceR ||
-    acorn.lineBreak.test(this.input.slice(this.last.end, this.tok.start))
-};
+  LooseParser.prototype.dummyNode = function dummyNode (type) {
+    var dummy = this.startNode();
+    dummy.type = type;
+    dummy.end = dummy.start;
+    if (this.options.locations)
+      { dummy.loc.end = dummy.loc.start; }
+    if (this.options.ranges)
+      { dummy.range[1] = dummy.start; }
+    this.last = {type: acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc};
+    return dummy
+  };
 
-LooseParser.prototype.semicolon = function semicolon () {
-  return this.eat(acorn.tokTypes.semi)
-};
+  LooseParser.prototype.dummyIdent = function dummyIdent () {
+    var dummy = this.dummyNode("Identifier");
+    dummy.name = "✖";
+    return dummy
+  };
 
-LooseParser.prototype.expect = function expect (type) {
-    var this$1 = this;
+  LooseParser.prototype.dummyString = function dummyString () {
+    var dummy = this.dummyNode("Literal");
+    dummy.value = dummy.raw = "✖";
+    return dummy
+  };
 
-  if (this.eat(type)) { return true }
-  for (var i = 1; i <= 2; i++) {
-    if (this$1.lookAhead(i).type === type) {
-      for (var j = 0; j < i; j++) { this$1.next(); }
+  LooseParser.prototype.eat = function eat (type) {
+    if (this.tok.type === type) {
+      this.next();
       return true
+    } else {
+      return false
     }
-  }
-};
+  };
 
-LooseParser.prototype.pushCx = function pushCx () {
-  this.context.push(this.curIndent);
-};
+  LooseParser.prototype.isContextual = function isContextual (name) {
+    return this.tok.type === acorn.tokTypes.name && this.tok.value === name
+  };
 
-LooseParser.prototype.popCx = function popCx () {
-  this.curIndent = this.context.pop();
-};
+  LooseParser.prototype.eatContextual = function eatContextual (name) {
+    return this.tok.value === name && this.eat(acorn.tokTypes.name)
+  };
 
-LooseParser.prototype.lineEnd = function lineEnd (pos) {
-  while (pos < this.input.length && !acorn.isNewLine(this.input.charCodeAt(pos))) { ++pos; }
-  return pos
-};
+  LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () {
+    return this.tok.type === acorn.tokTypes.eof || this.tok.type === acorn.tokTypes.braceR ||
+      acorn.lineBreak.test(this.input.slice(this.last.end, this.tok.start))
+  };
 
-LooseParser.prototype.indentationAfter = function indentationAfter (pos) {
-    var this$1 = this;
+  LooseParser.prototype.semicolon = function semicolon () {
+    return this.eat(acorn.tokTypes.semi)
+  };
 
-  for (var count = 0;; ++pos) {
-    var ch = this$1.input.charCodeAt(pos);
-    if (ch === 32) { ++count; }
-    else if (ch === 9) { count += this$1.options.tabSize; }
-    else { return count }
-  }
-};
+  LooseParser.prototype.expect = function expect (type) {
+    if (this.eat(type)) { return true }
+    for (var i = 1; i <= 2; i++) {
+      if (this.lookAhead(i).type === type) {
+        for (var j = 0; j < i; j++) { this.next(); }
+        return true
+      }
+    }
+  };
 
-LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) {
-  if (this.tok.type === closeTok || this.tok.type === acorn.tokTypes.eof) { return true }
-  return line !== this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
-    (!blockHeuristic || this.nextLineStart >= this.input.length ||
-     this.indentationAfter(this.nextLineStart) < indent)
-};
+  LooseParser.prototype.pushCx = function pushCx () {
+    this.context.push(this.curIndent);
+  };
 
-LooseParser.prototype.tokenStartsLine = function tokenStartsLine () {
-    var this$1 = this;
+  LooseParser.prototype.popCx = function popCx () {
+    this.curIndent = this.context.pop();
+  };
 
-  for (var p = this.tok.start - 1; p >= this.curLineStart; --p) {
-    var ch = this$1.input.charCodeAt(p);
-    if (ch !== 9 && ch !== 32) { return false }
-  }
-  return true
-};
+  LooseParser.prototype.lineEnd = function lineEnd (pos) {
+    while (pos < this.input.length && !acorn.isNewLine(this.input.charCodeAt(pos))) { ++pos; }
+    return pos
+  };
 
-LooseParser.prototype.extend = function extend (name, f) {
-  this[name] = f(this[name]);
-};
+  LooseParser.prototype.indentationAfter = function indentationAfter (pos) {
+    for (var count = 0;; ++pos) {
+      var ch = this.input.charCodeAt(pos);
+      if (ch === 32) { ++count; }
+      else if (ch === 9) { count += this.options.tabSize; }
+      else { return count }
+    }
+  };
 
-LooseParser.prototype.parse = function parse () {
-  this.next();
-  return this.parseTopLevel()
-};
+  LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) {
+    if (this.tok.type === closeTok || this.tok.type === acorn.tokTypes.eof) { return true }
+    return line !== this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
+      (!blockHeuristic || this.nextLineStart >= this.input.length ||
+       this.indentationAfter(this.nextLineStart) < indent)
+  };
 
-LooseParser.extend = function extend () {
-    var plugins = [], len = arguments.length;
-    while ( len-- ) plugins[ len ] = arguments[ len ];
+  LooseParser.prototype.tokenStartsLine = function tokenStartsLine () {
+    for (var p = this.tok.start - 1; p >= this.curLineStart; --p) {
+      var ch = this.input.charCodeAt(p);
+      if (ch !== 9 && ch !== 32) { return false }
+    }
+    return true
+  };
 
-  var cls = this;
-  for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
-  return cls
-};
+  LooseParser.prototype.extend = function extend (name, f) {
+    this[name] = f(this[name]);
+  };
 
-LooseParser.parse = function parse (input, options) {
-  return new this(input, options).parse()
-};
+  LooseParser.prototype.parse = function parse () {
+    this.next();
+    return this.parseTopLevel()
+  };
 
-// Allows plugins to extend the base parser / tokenizer used
-LooseParser.BaseParser = acorn.Parser;
+  LooseParser.extend = function extend () {
+      var plugins = [], len = arguments.length;
+      while ( len-- ) plugins[ len ] = arguments[ len ];
 
-var lp = LooseParser.prototype;
+    var cls = this;
+    for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
+    return cls
+  };
 
-function isSpace(ch) {
-  return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || acorn.isNewLine(ch)
-}
+  LooseParser.parse = function parse (input, options) {
+    return new this(input, options).parse()
+  };
 
-lp.next = function() {
-  var this$1 = this;
+  // Allows plugins to extend the base parser / tokenizer used
+  LooseParser.BaseParser = acorn.Parser;
 
-  this.last = this.tok;
-  if (this.ahead.length)
-    { this.tok = this.ahead.shift(); }
-  else
-    { this.tok = this.readToken(); }
+  var lp = LooseParser.prototype;
 
-  if (this.tok.start >= this.nextLineStart) {
-    while (this.tok.start >= this.nextLineStart) {
-      this$1.curLineStart = this$1.nextLineStart;
-      this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1;
-    }
-    this.curIndent = this.indentationAfter(this.curLineStart);
+  function isSpace(ch) {
+    return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || acorn.isNewLine(ch)
   }
-};
 
-lp.readToken = function() {
-  var this$1 = this;
+  lp.next = function() {
+    this.last = this.tok;
+    if (this.ahead.length)
+      { this.tok = this.ahead.shift(); }
+    else
+      { this.tok = this.readToken(); }
 
-  for (;;) {
-    try {
-      this$1.toks.next();
-      if (this$1.toks.type === acorn.tokTypes.dot &&
-          this$1.input.substr(this$1.toks.end, 1) === "." &&
-          this$1.options.ecmaVersion >= 6) {
-        this$1.toks.end++;
-        this$1.toks.type = acorn.tokTypes.ellipsis;
-      }
-      return new acorn.Token(this$1.toks)
-    } catch (e) {
-      if (!(e instanceof SyntaxError)) { throw e }
-
-      // Try to skip some text, based on the error message, and then continue
-      var msg = e.message, pos = e.raisedAt, replace = true;
-      if (/unterminated/i.test(msg)) {
-        pos = this$1.lineEnd(e.pos + 1);
-        if (/string/.test(msg)) {
-          replace = {start: e.pos, end: pos, type: acorn.tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)};
-        } else if (/regular expr/i.test(msg)) {
-          var re = this$1.input.slice(e.pos, pos);
-          try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ }
-          replace = {start: e.pos, end: pos, type: acorn.tokTypes.regexp, value: re};
-        } else if (/template/.test(msg)) {
-          replace = {
-            start: e.pos,
-            end: pos,
-            type: acorn.tokTypes.template,
-            value: this$1.input.slice(e.pos, pos)
-          };
-        } else {
+    if (this.tok.start >= this.nextLineStart) {
+      while (this.tok.start >= this.nextLineStart) {
+        this.curLineStart = this.nextLineStart;
+        this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
+      }
+      this.curIndent = this.indentationAfter(this.curLineStart);
+    }
+  };
+
+  lp.readToken = function() {
+    for (;;) {
+      try {
+        this.toks.next();
+        if (this.toks.type === acorn.tokTypes.dot &&
+            this.input.substr(this.toks.end, 1) === "." &&
+            this.options.ecmaVersion >= 6) {
+          this.toks.end++;
+          this.toks.type = acorn.tokTypes.ellipsis;
+        }
+        return new acorn.Token(this.toks)
+      } catch (e) {
+        if (!(e instanceof SyntaxError)) { throw e }
+
+        // Try to skip some text, based on the error message, and then continue
+        var msg = e.message, pos = e.raisedAt, replace = true;
+        if (/unterminated/i.test(msg)) {
+          pos = this.lineEnd(e.pos + 1);
+          if (/string/.test(msg)) {
+            replace = {start: e.pos, end: pos, type: acorn.tokTypes.string, value: this.input.slice(e.pos + 1, pos)};
+          } else if (/regular expr/i.test(msg)) {
+            var re = this.input.slice(e.pos, pos);
+            try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ }
+            replace = {start: e.pos, end: pos, type: acorn.tokTypes.regexp, value: re};
+          } else if (/template/.test(msg)) {
+            replace = {
+              start: e.pos,
+              end: pos,
+              type: acorn.tokTypes.template,
+              value: this.input.slice(e.pos, pos)
+            };
+          } else {
+            replace = false;
+          }
+        } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
+          while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; }
+        } else if (/character escape|expected hexadecimal/i.test(msg)) {
+          while (pos < this.input.length) {
+            var ch = this.input.charCodeAt(pos++);
+            if (ch === 34 || ch === 39 || acorn.isNewLine(ch)) { break }
+          }
+        } else if (/unexpected character/i.test(msg)) {
+          pos++;
           replace = false;
+        } else if (/regular expression/i.test(msg)) {
+          replace = true;
+        } else {
+          throw e
         }
-      } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
-        while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; }
-      } else if (/character escape|expected hexadecimal/i.test(msg)) {
-        while (pos < this.input.length) {
-          var ch = this$1.input.charCodeAt(pos++);
-          if (ch === 34 || ch === 39 || acorn.isNewLine(ch)) { break }
+        this.resetTo(pos);
+        if (replace === true) { replace = {start: pos, end: pos, type: acorn.tokTypes.name, value: "✖"}; }
+        if (replace) {
+          if (this.options.locations)
+            { replace.loc = new acorn.SourceLocation(
+              this.toks,
+              acorn.getLineInfo(this.input, replace.start),
+              acorn.getLineInfo(this.input, replace.end)); }
+          return replace
         }
-      } else if (/unexpected character/i.test(msg)) {
-        pos++;
-        replace = false;
-      } else if (/regular expression/i.test(msg)) {
-        replace = true;
-      } else {
-        throw e
-      }
-      this$1.resetTo(pos);
-      if (replace === true) { replace = {start: pos, end: pos, type: acorn.tokTypes.name, value: "✖"}; }
-      if (replace) {
-        if (this$1.options.locations)
-          { replace.loc = new acorn.SourceLocation(
-            this$1.toks,
-            acorn.getLineInfo(this$1.input, replace.start),
-            acorn.getLineInfo(this$1.input, replace.end)); }
-        return replace
       }
     }
-  }
-};
-
-lp.resetTo = function(pos) {
-  var this$1 = this;
-
-  this.toks.pos = pos;
-  var ch = this.input.charAt(pos - 1);
-  this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
-    /[enwfd]/.test(ch) &&
-    /\b(case|else|return|throw|new|in|(instance|type)?of|delete|void)$/.test(this.input.slice(pos - 10, pos));
+  };
 
-  if (this.options.locations) {
-    this.toks.curLine = 1;
-    this.toks.lineStart = acorn.lineBreakG.lastIndex = 0;
-    var match;
-    while ((match = acorn.lineBreakG.exec(this.input)) && match.index < pos) {
-      ++this$1.toks.curLine;
-      this$1.toks.lineStart = match.index + match[0].length;
+  lp.resetTo = function(pos) {
+    this.toks.pos = pos;
+    var ch = this.input.charAt(pos - 1);
+    this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
+      /[enwfd]/.test(ch) &&
+      /\b(case|else|return|throw|new|in|(instance|type)?of|delete|void)$/.test(this.input.slice(pos - 10, pos));
+
+    if (this.options.locations) {
+      this.toks.curLine = 1;
+      this.toks.lineStart = acorn.lineBreakG.lastIndex = 0;
+      var match;
+      while ((match = acorn.lineBreakG.exec(this.input)) && match.index < pos) {
+        ++this.toks.curLine;
+        this.toks.lineStart = match.index + match[0].length;
+      }
     }
-  }
-};
-
-lp.lookAhead = function(n) {
-  var this$1 = this;
-
-  while (n > this.ahead.length)
-    { this$1.ahead.push(this$1.readToken()); }
-  return this.ahead[n - 1]
-};
+  };
 
-function isDummy(node) { return node.name === "✖" }
+  lp.lookAhead = function(n) {
+    while (n > this.ahead.length)
+      { this.ahead.push(this.readToken()); }
+    return this.ahead[n - 1]
+  };
 
-var lp$1 = LooseParser.prototype;
+  function isDummy(node) { return node.name === "✖" }
 
-lp$1.parseTopLevel = function() {
-  var this$1 = this;
+  var lp$1 = LooseParser.prototype;
 
-  var node = this.startNodeAt(this.options.locations ? [0, acorn.getLineInfo(this.input, 0)] : 0);
-  node.body = [];
-  while (this.tok.type !== acorn.tokTypes.eof) { node.body.push(this$1.parseStatement()); }
-  this.toks.adaptDirectivePrologue(node.body);
-  this.last = this.tok;
-  if (this.options.ecmaVersion >= 6) {
+  lp$1.parseTopLevel = function() {
+    var node = this.startNodeAt(this.options.locations ? [0, acorn.getLineInfo(this.input, 0)] : 0);
+    node.body = [];
+    while (this.tok.type !== acorn.tokTypes.eof) { node.body.push(this.parseStatement()); }
+    this.toks.adaptDirectivePrologue(node.body);
+    this.last = this.tok;
     node.sourceType = this.options.sourceType;
-  }
-  return this.finishNode(node, "Program")
-};
-
-lp$1.parseStatement = function() {
-  var this$1 = this;
-
-  var starttype = this.tok.type, node = this.startNode(), kind;
+    return this.finishNode(node, "Program")
+  };
 
-  if (this.toks.isLet()) {
-    starttype = acorn.tokTypes._var;
-    kind = "let";
-  }
+  lp$1.parseStatement = function() {
+    var starttype = this.tok.type, node = this.startNode(), kind;
 
-  switch (starttype) {
-  case acorn.tokTypes._break: case acorn.tokTypes._continue:
-    this.next();
-    var isBreak = starttype === acorn.tokTypes._break;
-    if (this.semicolon() || this.canInsertSemicolon()) {
-      node.label = null;
-    } else {
-      node.label = this.tok.type === acorn.tokTypes.name ? this.parseIdent() : null;
-      this.semicolon();
+    if (this.toks.isLet()) {
+      starttype = acorn.tokTypes._var;
+      kind = "let";
     }
-    return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-
-  case acorn.tokTypes._debugger:
-    this.next();
-    this.semicolon();
-    return this.finishNode(node, "DebuggerStatement")
 
-  case acorn.tokTypes._do:
-    this.next();
-    node.body = this.parseStatement();
-    node.test = this.eat(acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent();
-    this.semicolon();
-    return this.finishNode(node, "DoWhileStatement")
+    switch (starttype) {
+    case acorn.tokTypes._break: case acorn.tokTypes._continue:
+      this.next();
+      var isBreak = starttype === acorn.tokTypes._break;
+      if (this.semicolon() || this.canInsertSemicolon()) {
+        node.label = null;
+      } else {
+        node.label = this.tok.type === acorn.tokTypes.name ? this.parseIdent() : null;
+        this.semicolon();
+      }
+      return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
 
-  case acorn.tokTypes._for:
-    this.next(); // `for` keyword
-    var isAwait = this.options.ecmaVersion >= 9 && this.inAsync && this.eatContextual("await");
+    case acorn.tokTypes._debugger:
+      this.next();
+      this.semicolon();
+      return this.finishNode(node, "DebuggerStatement")
 
-    this.pushCx();
-    this.expect(acorn.tokTypes.parenL);
-    if (this.tok.type === acorn.tokTypes.semi) { return this.parseFor(node, null) }
-    var isLet = this.toks.isLet();
-    if (isLet || this.tok.type === acorn.tokTypes._var || this.tok.type === acorn.tokTypes._const) {
-      var init$1 = this.parseVar(this.startNode(), true, isLet ? "let" : this.tok.value);
-      if (init$1.declarations.length === 1 && (this.tok.type === acorn.tokTypes._in || this.isContextual("of"))) {
+    case acorn.tokTypes._do:
+      this.next();
+      node.body = this.parseStatement();
+      node.test = this.eat(acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent();
+      this.semicolon();
+      return this.finishNode(node, "DoWhileStatement")
+
+    case acorn.tokTypes._for:
+      this.next(); // `for` keyword
+      var isAwait = this.options.ecmaVersion >= 9 && this.inAsync && this.eatContextual("await");
+
+      this.pushCx();
+      this.expect(acorn.tokTypes.parenL);
+      if (this.tok.type === acorn.tokTypes.semi) { return this.parseFor(node, null) }
+      var isLet = this.toks.isLet();
+      if (isLet || this.tok.type === acorn.tokTypes._var || this.tok.type === acorn.tokTypes._const) {
+        var init$1 = this.parseVar(this.startNode(), true, isLet ? "let" : this.tok.value);
+        if (init$1.declarations.length === 1 && (this.tok.type === acorn.tokTypes._in || this.isContextual("of"))) {
+          if (this.options.ecmaVersion >= 9 && this.tok.type !== acorn.tokTypes._in) {
+            node.await = isAwait;
+          }
+          return this.parseForIn(node, init$1)
+        }
+        return this.parseFor(node, init$1)
+      }
+      var init = this.parseExpression(true);
+      if (this.tok.type === acorn.tokTypes._in || this.isContextual("of")) {
         if (this.options.ecmaVersion >= 9 && this.tok.type !== acorn.tokTypes._in) {
           node.await = isAwait;
         }
-        return this.parseForIn(node, init$1)
+        return this.parseForIn(node, this.toAssignable(init))
       }
-      return this.parseFor(node, init$1)
-    }
-    var init = this.parseExpression(true);
-    if (this.tok.type === acorn.tokTypes._in || this.isContextual("of")) {
-      if (this.options.ecmaVersion >= 9 && this.tok.type !== acorn.tokTypes._in) {
-        node.await = isAwait;
-      }
-      return this.parseForIn(node, this.toAssignable(init))
-    }
-    return this.parseFor(node, init)
-
-  case acorn.tokTypes._function:
-    this.next();
-    return this.parseFunction(node, true)
+      return this.parseFor(node, init)
 
-  case acorn.tokTypes._if:
-    this.next();
-    node.test = this.parseParenExpression();
-    node.consequent = this.parseStatement();
-    node.alternate = this.eat(acorn.tokTypes._else) ? this.parseStatement() : null;
-    return this.finishNode(node, "IfStatement")
+    case acorn.tokTypes._function:
+      this.next();
+      return this.parseFunction(node, true)
 
-  case acorn.tokTypes._return:
-    this.next();
-    if (this.eat(acorn.tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; }
-    else { node.argument = this.parseExpression(); this.semicolon(); }
-    return this.finishNode(node, "ReturnStatement")
+    case acorn.tokTypes._if:
+      this.next();
+      node.test = this.parseParenExpression();
+      node.consequent = this.parseStatement();
+      node.alternate = this.eat(acorn.tokTypes._else) ? this.parseStatement() : null;
+      return this.finishNode(node, "IfStatement")
 
-  case acorn.tokTypes._switch:
-    var blockIndent = this.curIndent, line = this.curLineStart;
-    this.next();
-    node.discriminant = this.parseParenExpression();
-    node.cases = [];
-    this.pushCx();
-    this.expect(acorn.tokTypes.braceL);
+    case acorn.tokTypes._return:
+      this.next();
+      if (this.eat(acorn.tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; }
+      else { node.argument = this.parseExpression(); this.semicolon(); }
+      return this.finishNode(node, "ReturnStatement")
 
-    var cur;
-    while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true)) {
-      if (this$1.tok.type === acorn.tokTypes._case || this$1.tok.type === acorn.tokTypes._default) {
-        var isCase = this$1.tok.type === acorn.tokTypes._case;
-        if (cur) { this$1.finishNode(cur, "SwitchCase"); }
-        node.cases.push(cur = this$1.startNode());
-        cur.consequent = [];
-        this$1.next();
-        if (isCase) { cur.test = this$1.parseExpression(); }
-        else { cur.test = null; }
-        this$1.expect(acorn.tokTypes.colon);
-      } else {
-        if (!cur) {
-          node.cases.push(cur = this$1.startNode());
+    case acorn.tokTypes._switch:
+      var blockIndent = this.curIndent, line = this.curLineStart;
+      this.next();
+      node.discriminant = this.parseParenExpression();
+      node.cases = [];
+      this.pushCx();
+      this.expect(acorn.tokTypes.braceL);
+
+      var cur;
+      while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true)) {
+        if (this.tok.type === acorn.tokTypes._case || this.tok.type === acorn.tokTypes._default) {
+          var isCase = this.tok.type === acorn.tokTypes._case;
+          if (cur) { this.finishNode(cur, "SwitchCase"); }
+          node.cases.push(cur = this.startNode());
           cur.consequent = [];
-          cur.test = null;
+          this.next();
+          if (isCase) { cur.test = this.parseExpression(); }
+          else { cur.test = null; }
+          this.expect(acorn.tokTypes.colon);
+        } else {
+          if (!cur) {
+            node.cases.push(cur = this.startNode());
+            cur.consequent = [];
+            cur.test = null;
+          }
+          cur.consequent.push(this.parseStatement());
         }
-        cur.consequent.push(this$1.parseStatement());
       }
-    }
-    if (cur) { this.finishNode(cur, "SwitchCase"); }
-    this.popCx();
-    this.eat(acorn.tokTypes.braceR);
-    return this.finishNode(node, "SwitchStatement")
+      if (cur) { this.finishNode(cur, "SwitchCase"); }
+      this.popCx();
+      this.eat(acorn.tokTypes.braceR);
+      return this.finishNode(node, "SwitchStatement")
 
-  case acorn.tokTypes._throw:
-    this.next();
-    node.argument = this.parseExpression();
-    this.semicolon();
-    return this.finishNode(node, "ThrowStatement")
+    case acorn.tokTypes._throw:
+      this.next();
+      node.argument = this.parseExpression();
+      this.semicolon();
+      return this.finishNode(node, "ThrowStatement")
 
-  case acorn.tokTypes._try:
-    this.next();
-    node.block = this.parseBlock();
-    node.handler = null;
-    if (this.tok.type === acorn.tokTypes._catch) {
-      var clause = this.startNode();
+    case acorn.tokTypes._try:
       this.next();
-      if (this.eat(acorn.tokTypes.parenL)) {
-        clause.param = this.toAssignable(this.parseExprAtom(), true);
-        this.expect(acorn.tokTypes.parenR);
-      } else {
-        clause.param = null;
+      node.block = this.parseBlock();
+      node.handler = null;
+      if (this.tok.type === acorn.tokTypes._catch) {
+        var clause = this.startNode();
+        this.next();
+        if (this.eat(acorn.tokTypes.parenL)) {
+          clause.param = this.toAssignable(this.parseExprAtom(), true);
+          this.expect(acorn.tokTypes.parenR);
+        } else {
+          clause.param = null;
+        }
+        clause.body = this.parseBlock();
+        node.handler = this.finishNode(clause, "CatchClause");
       }
-      clause.body = this.parseBlock();
-      node.handler = this.finishNode(clause, "CatchClause");
-    }
-    node.finalizer = this.eat(acorn.tokTypes._finally) ? this.parseBlock() : null;
-    if (!node.handler && !node.finalizer) { return node.block }
-    return this.finishNode(node, "TryStatement")
+      node.finalizer = this.eat(acorn.tokTypes._finally) ? this.parseBlock() : null;
+      if (!node.handler && !node.finalizer) { return node.block }
+      return this.finishNode(node, "TryStatement")
 
-  case acorn.tokTypes._var:
-  case acorn.tokTypes._const:
-    return this.parseVar(node, false, kind || this.tok.value)
+    case acorn.tokTypes._var:
+    case acorn.tokTypes._const:
+      return this.parseVar(node, false, kind || this.tok.value)
 
-  case acorn.tokTypes._while:
-    this.next();
-    node.test = this.parseParenExpression();
-    node.body = this.parseStatement();
-    return this.finishNode(node, "WhileStatement")
+    case acorn.tokTypes._while:
+      this.next();
+      node.test = this.parseParenExpression();
+      node.body = this.parseStatement();
+      return this.finishNode(node, "WhileStatement")
 
-  case acorn.tokTypes._with:
-    this.next();
-    node.object = this.parseParenExpression();
-    node.body = this.parseStatement();
-    return this.finishNode(node, "WithStatement")
+    case acorn.tokTypes._with:
+      this.next();
+      node.object = this.parseParenExpression();
+      node.body = this.parseStatement();
+      return this.finishNode(node, "WithStatement")
 
-  case acorn.tokTypes.braceL:
-    return this.parseBlock()
+    case acorn.tokTypes.braceL:
+      return this.parseBlock()
 
-  case acorn.tokTypes.semi:
-    this.next();
-    return this.finishNode(node, "EmptyStatement")
+    case acorn.tokTypes.semi:
+      this.next();
+      return this.finishNode(node, "EmptyStatement")
 
-  case acorn.tokTypes._class:
-    return this.parseClass(true)
+    case acorn.tokTypes._class:
+      return this.parseClass(true)
 
-  case acorn.tokTypes._import:
-    return this.parseImport()
+    case acorn.tokTypes._import:
+      if (this.options.ecmaVersion > 10 && this.lookAhead(1).type === acorn.tokTypes.parenL) {
+        node.expression = this.parseExpression();
+        this.semicolon();
+        return this.finishNode(node, "ExpressionStatement")
+      }
 
-  case acorn.tokTypes._export:
-    return this.parseExport()
+      return this.parseImport()
 
-  default:
-    if (this.toks.isAsyncFunction()) {
-      this.next();
-      this.next();
-      return this.parseFunction(node, true, true)
-    }
-    var expr = this.parseExpression();
-    if (isDummy(expr)) {
-      this.next();
-      if (this.tok.type === acorn.tokTypes.eof) { return this.finishNode(node, "EmptyStatement") }
-      return this.parseStatement()
-    } else if (starttype === acorn.tokTypes.name && expr.type === "Identifier" && this.eat(acorn.tokTypes.colon)) {
-      node.body = this.parseStatement();
-      node.label = expr;
-      return this.finishNode(node, "LabeledStatement")
-    } else {
-      node.expression = expr;
-      this.semicolon();
-      return this.finishNode(node, "ExpressionStatement")
+    case acorn.tokTypes._export:
+      return this.parseExport()
+
+    default:
+      if (this.toks.isAsyncFunction()) {
+        this.next();
+        this.next();
+        return this.parseFunction(node, true, true)
+      }
+      var expr = this.parseExpression();
+      if (isDummy(expr)) {
+        this.next();
+        if (this.tok.type === acorn.tokTypes.eof) { return this.finishNode(node, "EmptyStatement") }
+        return this.parseStatement()
+      } else if (starttype === acorn.tokTypes.name && expr.type === "Identifier" && this.eat(acorn.tokTypes.colon)) {
+        node.body = this.parseStatement();
+        node.label = expr;
+        return this.finishNode(node, "LabeledStatement")
+      } else {
+        node.expression = expr;
+        this.semicolon();
+        return this.finishNode(node, "ExpressionStatement")
+      }
     }
-  }
-};
+  };
 
-lp$1.parseBlock = function() {
-  var this$1 = this;
-
-  var node = this.startNode();
-  this.pushCx();
-  this.expect(acorn.tokTypes.braceL);
-  var blockIndent = this.curIndent, line = this.curLineStart;
-  node.body = [];
-  while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true))
-    { node.body.push(this$1.parseStatement()); }
-  this.popCx();
-  this.eat(acorn.tokTypes.braceR);
-  return this.finishNode(node, "BlockStatement")
-};
+  lp$1.parseBlock = function() {
+    var node = this.startNode();
+    this.pushCx();
+    this.expect(acorn.tokTypes.braceL);
+    var blockIndent = this.curIndent, line = this.curLineStart;
+    node.body = [];
+    while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true))
+      { node.body.push(this.parseStatement()); }
+    this.popCx();
+    this.eat(acorn.tokTypes.braceR);
+    return this.finishNode(node, "BlockStatement")
+  };
 
-lp$1.parseFor = function(node, init) {
-  node.init = init;
-  node.test = node.update = null;
-  if (this.eat(acorn.tokTypes.semi) && this.tok.type !== acorn.tokTypes.semi) { node.test = this.parseExpression(); }
-  if (this.eat(acorn.tokTypes.semi) && this.tok.type !== acorn.tokTypes.parenR) { node.update = this.parseExpression(); }
-  this.popCx();
-  this.expect(acorn.tokTypes.parenR);
-  node.body = this.parseStatement();
-  return this.finishNode(node, "ForStatement")
-};
+  lp$1.parseFor = function(node, init) {
+    node.init = init;
+    node.test = node.update = null;
+    if (this.eat(acorn.tokTypes.semi) && this.tok.type !== acorn.tokTypes.semi) { node.test = this.parseExpression(); }
+    if (this.eat(acorn.tokTypes.semi) && this.tok.type !== acorn.tokTypes.parenR) { node.update = this.parseExpression(); }
+    this.popCx();
+    this.expect(acorn.tokTypes.parenR);
+    node.body = this.parseStatement();
+    return this.finishNode(node, "ForStatement")
+  };
 
-lp$1.parseForIn = function(node, init) {
-  var type = this.tok.type === acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement";
-  this.next();
-  node.left = init;
-  node.right = this.parseExpression();
-  this.popCx();
-  this.expect(acorn.tokTypes.parenR);
-  node.body = this.parseStatement();
-  return this.finishNode(node, type)
-};
+  lp$1.parseForIn = function(node, init) {
+    var type = this.tok.type === acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement";
+    this.next();
+    node.left = init;
+    node.right = this.parseExpression();
+    this.popCx();
+    this.expect(acorn.tokTypes.parenR);
+    node.body = this.parseStatement();
+    return this.finishNode(node, type)
+  };
 
-lp$1.parseVar = function(node, noIn, kind) {
-  var this$1 = this;
-
-  node.kind = kind;
-  this.next();
-  node.declarations = [];
-  do {
-    var decl = this$1.startNode();
-    decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent();
-    decl.init = this$1.eat(acorn.tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null;
-    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
-  } while (this.eat(acorn.tokTypes.comma))
-  if (!node.declarations.length) {
-    var decl$1 = this.startNode();
-    decl$1.id = this.dummyIdent();
-    node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"));
-  }
-  if (!noIn) { this.semicolon(); }
-  return this.finishNode(node, "VariableDeclaration")
-};
+  lp$1.parseVar = function(node, noIn, kind) {
+    node.kind = kind;
+    this.next();
+    node.declarations = [];
+    do {
+      var decl = this.startNode();
+      decl.id = this.options.ecmaVersion >= 6 ? this.toAssignable(this.parseExprAtom(), true) : this.parseIdent();
+      decl.init = this.eat(acorn.tokTypes.eq) ? this.parseMaybeAssign(noIn) : null;
+      node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
+    } while (this.eat(acorn.tokTypes.comma))
+    if (!node.declarations.length) {
+      var decl$1 = this.startNode();
+      decl$1.id = this.dummyIdent();
+      node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"));
+    }
+    if (!noIn) { this.semicolon(); }
+    return this.finishNode(node, "VariableDeclaration")
+  };
 
-lp$1.parseClass = function(isStatement) {
-  var this$1 = this;
-
-  var node = this.startNode();
-  this.next();
-  if (this.tok.type === acorn.tokTypes.name) { node.id = this.parseIdent(); }
-  else if (isStatement === true) { node.id = this.dummyIdent(); }
-  else { node.id = null; }
-  node.superClass = this.eat(acorn.tokTypes._extends) ? this.parseExpression() : null;
-  node.body = this.startNode();
-  node.body.body = [];
-  this.pushCx();
-  var indent = this.curIndent + 1, line = this.curLineStart;
-  this.eat(acorn.tokTypes.braceL);
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
-  while (!this.closes(acorn.tokTypes.braceR, indent, line)) {
-    if (this$1.semicolon()) { continue }
-    var method = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0);
-    if (this$1.options.ecmaVersion >= 6) {
-      method.static = false;
-      isGenerator = this$1.eat(acorn.tokTypes.star);
-    }
-    this$1.parsePropertyName(method);
-    if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(acorn.tokTypes.comma); continue }
-    if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" &&
-        (this$1.tok.type !== acorn.tokTypes.parenL && this$1.tok.type !== acorn.tokTypes.braceL)) {
-      method.static = true;
-      isGenerator = this$1.eat(acorn.tokTypes.star);
-      this$1.parsePropertyName(method);
-    } else {
-      method.static = false;
-    }
-    if (!method.computed &&
-        method.key.type === "Identifier" && method.key.name === "async" && this$1.tok.type !== acorn.tokTypes.parenL &&
-        !this$1.canInsertSemicolon()) {
-      isAsync = true;
-      isGenerator = this$1.options.ecmaVersion >= 9 && this$1.eat(acorn.tokTypes.star);
-      this$1.parsePropertyName(method);
-    } else {
-      isAsync = false;
-    }
-    if (this$1.options.ecmaVersion >= 5 && method.key.type === "Identifier" &&
-        !method.computed && (method.key.name === "get" || method.key.name === "set") &&
-        this$1.tok.type !== acorn.tokTypes.parenL && this$1.tok.type !== acorn.tokTypes.braceL) {
-      method.kind = method.key.name;
-      this$1.parsePropertyName(method);
-      method.value = this$1.parseMethod(false);
-    } else {
-      if (!method.computed && !method.static && !isGenerator && !isAsync && (
-        method.key.type === "Identifier" && method.key.name === "constructor" ||
-          method.key.type === "Literal" && method.key.value === "constructor")) {
-        method.kind = "constructor";
+  lp$1.parseClass = function(isStatement) {
+    var node = this.startNode();
+    this.next();
+    if (this.tok.type === acorn.tokTypes.name) { node.id = this.parseIdent(); }
+    else if (isStatement === true) { node.id = this.dummyIdent(); }
+    else { node.id = null; }
+    node.superClass = this.eat(acorn.tokTypes._extends) ? this.parseExpression() : null;
+    node.body = this.startNode();
+    node.body.body = [];
+    this.pushCx();
+    var indent = this.curIndent + 1, line = this.curLineStart;
+    this.eat(acorn.tokTypes.braceL);
+    if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
+    while (!this.closes(acorn.tokTypes.braceR, indent, line)) {
+      if (this.semicolon()) { continue }
+      var method = this.startNode(), isGenerator = (void 0), isAsync = (void 0);
+      if (this.options.ecmaVersion >= 6) {
+        method.static = false;
+        isGenerator = this.eat(acorn.tokTypes.star);
+      }
+      this.parsePropertyName(method);
+      if (isDummy(method.key)) { if (isDummy(this.parseMaybeAssign())) { this.next(); } this.eat(acorn.tokTypes.comma); continue }
+      if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" &&
+          (this.tok.type !== acorn.tokTypes.parenL && this.tok.type !== acorn.tokTypes.braceL)) {
+        method.static = true;
+        isGenerator = this.eat(acorn.tokTypes.star);
+        this.parsePropertyName(method);
       } else {
-        method.kind = "method";
+        method.static = false;
       }
-      method.value = this$1.parseMethod(isGenerator, isAsync);
+      if (!method.computed &&
+          method.key.type === "Identifier" && method.key.name === "async" && this.tok.type !== acorn.tokTypes.parenL &&
+          !this.canInsertSemicolon()) {
+        isAsync = true;
+        isGenerator = this.options.ecmaVersion >= 9 && this.eat(acorn.tokTypes.star);
+        this.parsePropertyName(method);
+      } else {
+        isAsync = false;
+      }
+      if (this.options.ecmaVersion >= 5 && method.key.type === "Identifier" &&
+          !method.computed && (method.key.name === "get" || method.key.name === "set") &&
+          this.tok.type !== acorn.tokTypes.parenL && this.tok.type !== acorn.tokTypes.braceL) {
+        method.kind = method.key.name;
+        this.parsePropertyName(method);
+        method.value = this.parseMethod(false);
+      } else {
+        if (!method.computed && !method.static && !isGenerator && !isAsync && (
+          method.key.type === "Identifier" && method.key.name === "constructor" ||
+            method.key.type === "Literal" && method.key.value === "constructor")) {
+          method.kind = "constructor";
+        } else {
+          method.kind = "method";
+        }
+        method.value = this.parseMethod(isGenerator, isAsync);
+      }
+      node.body.body.push(this.finishNode(method, "MethodDefinition"));
     }
-    node.body.body.push(this$1.finishNode(method, "MethodDefinition"));
-  }
-  this.popCx();
-  if (!this.eat(acorn.tokTypes.braceR)) {
-    // If there is no closing brace, make the node span to the start
-    // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start;
-    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
-  }
-  this.semicolon();
-  this.finishNode(node.body, "ClassBody");
-  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-};
+    this.popCx();
+    if (!this.eat(acorn.tokTypes.braceR)) {
+      // If there is no closing brace, make the node span to the start
+      // of the next token (this is useful for Tern)
+      this.last.end = this.tok.start;
+      if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
+    }
+    this.semicolon();
+    this.finishNode(node.body, "ClassBody");
+    return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
+  };
 
-lp$1.parseFunction = function(node, isStatement, isAsync) {
-  var oldInAsync = this.inAsync, oldInFunction = this.inFunction;
-  this.initFunction(node);
-  if (this.options.ecmaVersion >= 6) {
-    node.generator = this.eat(acorn.tokTypes.star);
-  }
-  if (this.options.ecmaVersion >= 8) {
-    node.async = !!isAsync;
-  }
-  if (this.tok.type === acorn.tokTypes.name) { node.id = this.parseIdent(); }
-  else if (isStatement === true) { node.id = this.dummyIdent(); }
-  this.inAsync = node.async;
-  this.inFunction = true;
-  node.params = this.parseFunctionParams();
-  node.body = this.parseBlock();
-  this.toks.adaptDirectivePrologue(node.body.body);
-  this.inAsync = oldInAsync;
-  this.inFunction = oldInFunction;
-  return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-};
+  lp$1.parseFunction = function(node, isStatement, isAsync) {
+    var oldInAsync = this.inAsync, oldInFunction = this.inFunction;
+    this.initFunction(node);
+    if (this.options.ecmaVersion >= 6) {
+      node.generator = this.eat(acorn.tokTypes.star);
+    }
+    if (this.options.ecmaVersion >= 8) {
+      node.async = !!isAsync;
+    }
+    if (this.tok.type === acorn.tokTypes.name) { node.id = this.parseIdent(); }
+    else if (isStatement === true) { node.id = this.dummyIdent(); }
+    this.inAsync = node.async;
+    this.inFunction = true;
+    node.params = this.parseFunctionParams();
+    node.body = this.parseBlock();
+    this.toks.adaptDirectivePrologue(node.body.body);
+    this.inAsync = oldInAsync;
+    this.inFunction = oldInFunction;
+    return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
+  };
 
-lp$1.parseExport = function() {
-  var node = this.startNode();
-  this.next();
-  if (this.eat(acorn.tokTypes.star)) {
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString();
-    return this.finishNode(node, "ExportAllDeclaration")
-  }
-  if (this.eat(acorn.tokTypes._default)) {
-    // export default (function foo() {}) // This is FunctionExpression.
-    var isAsync;
-    if (this.tok.type === acorn.tokTypes._function || (isAsync = this.toks.isAsyncFunction())) {
-      var fNode = this.startNode();
-      this.next();
-      if (isAsync) { this.next(); }
-      node.declaration = this.parseFunction(fNode, "nullableID", isAsync);
-    } else if (this.tok.type === acorn.tokTypes._class) {
-      node.declaration = this.parseClass("nullableID");
+  lp$1.parseExport = function() {
+    var node = this.startNode();
+    this.next();
+    if (this.eat(acorn.tokTypes.star)) {
+      node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString();
+      return this.finishNode(node, "ExportAllDeclaration")
+    }
+    if (this.eat(acorn.tokTypes._default)) {
+      // export default (function foo() {}) // This is FunctionExpression.
+      var isAsync;
+      if (this.tok.type === acorn.tokTypes._function || (isAsync = this.toks.isAsyncFunction())) {
+        var fNode = this.startNode();
+        this.next();
+        if (isAsync) { this.next(); }
+        node.declaration = this.parseFunction(fNode, "nullableID", isAsync);
+      } else if (this.tok.type === acorn.tokTypes._class) {
+        node.declaration = this.parseClass("nullableID");
+      } else {
+        node.declaration = this.parseMaybeAssign();
+        this.semicolon();
+      }
+      return this.finishNode(node, "ExportDefaultDeclaration")
+    }
+    if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
+      node.declaration = this.parseStatement();
+      node.specifiers = [];
+      node.source = null;
     } else {
-      node.declaration = this.parseMaybeAssign();
+      node.declaration = null;
+      node.specifiers = this.parseExportSpecifierList();
+      node.source = this.eatContextual("from") ? this.parseExprAtom() : null;
       this.semicolon();
     }
-    return this.finishNode(node, "ExportDefaultDeclaration")
-  }
-  if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
-    node.declaration = this.parseStatement();
-    node.specifiers = [];
-    node.source = null;
-  } else {
-    node.declaration = null;
-    node.specifiers = this.parseExportSpecifierList();
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : null;
-    this.semicolon();
-  }
-  return this.finishNode(node, "ExportNamedDeclaration")
-};
+    return this.finishNode(node, "ExportNamedDeclaration")
+  };
 
-lp$1.parseImport = function() {
-  var node = this.startNode();
-  this.next();
-  if (this.tok.type === acorn.tokTypes.string) {
-    node.specifiers = [];
-    node.source = this.parseExprAtom();
-  } else {
-    var elt;
-    if (this.tok.type === acorn.tokTypes.name && this.tok.value !== "from") {
-      elt = this.startNode();
-      elt.local = this.parseIdent();
-      this.finishNode(elt, "ImportDefaultSpecifier");
-      this.eat(acorn.tokTypes.comma);
+  lp$1.parseImport = function() {
+    var node = this.startNode();
+    this.next();
+    if (this.tok.type === acorn.tokTypes.string) {
+      node.specifiers = [];
+      node.source = this.parseExprAtom();
+    } else {
+      var elt;
+      if (this.tok.type === acorn.tokTypes.name && this.tok.value !== "from") {
+        elt = this.startNode();
+        elt.local = this.parseIdent();
+        this.finishNode(elt, "ImportDefaultSpecifier");
+        this.eat(acorn.tokTypes.comma);
+      }
+      node.specifiers = this.parseImportSpecifiers();
+      node.source = this.eatContextual("from") && this.tok.type === acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString();
+      if (elt) { node.specifiers.unshift(elt); }
     }
-    node.specifiers = this.parseImportSpecifiers();
-    node.source = this.eatContextual("from") && this.tok.type === acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString();
-    if (elt) { node.specifiers.unshift(elt); }
-  }
-  this.semicolon();
-  return this.finishNode(node, "ImportDeclaration")
-};
+    this.semicolon();
+    return this.finishNode(node, "ImportDeclaration")
+  };
 
-lp$1.parseImportSpecifiers = function() {
-  var this$1 = this;
+  lp$1.parseImportSpecifiers = function() {
+    var elts = [];
+    if (this.tok.type === acorn.tokTypes.star) {
+      var elt = this.startNode();
+      this.next();
+      elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
+      elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"));
+    } else {
+      var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
+      this.pushCx();
+      this.eat(acorn.tokTypes.braceL);
+      if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
+      while (!this.closes(acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
+        var elt$1 = this.startNode();
+        if (this.eat(acorn.tokTypes.star)) {
+          elt$1.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
+          this.finishNode(elt$1, "ImportNamespaceSpecifier");
+        } else {
+          if (this.isContextual("from")) { break }
+          elt$1.imported = this.parseIdent();
+          if (isDummy(elt$1.imported)) { break }
+          elt$1.local = this.eatContextual("as") ? this.parseIdent() : elt$1.imported;
+          this.finishNode(elt$1, "ImportSpecifier");
+        }
+        elts.push(elt$1);
+        this.eat(acorn.tokTypes.comma);
+      }
+      this.eat(acorn.tokTypes.braceR);
+      this.popCx();
+    }
+    return elts
+  };
 
-  var elts = [];
-  if (this.tok.type === acorn.tokTypes.star) {
-    var elt = this.startNode();
-    this.next();
-    elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
-    elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"));
-  } else {
+  lp$1.parseExportSpecifierList = function() {
+    var elts = [];
     var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
     this.pushCx();
     this.eat(acorn.tokTypes.braceL);
     if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
     while (!this.closes(acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-      var elt$1 = this$1.startNode();
-      if (this$1.eat(acorn.tokTypes.star)) {
-        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent();
-        this$1.finishNode(elt$1, "ImportNamespaceSpecifier");
-      } else {
-        if (this$1.isContextual("from")) { break }
-        elt$1.imported = this$1.parseIdent();
-        if (isDummy(elt$1.imported)) { break }
-        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported;
-        this$1.finishNode(elt$1, "ImportSpecifier");
-      }
-      elts.push(elt$1);
-      this$1.eat(acorn.tokTypes.comma);
+      if (this.isContextual("from")) { break }
+      var elt = this.startNode();
+      elt.local = this.parseIdent();
+      if (isDummy(elt.local)) { break }
+      elt.exported = this.eatContextual("as") ? this.parseIdent() : elt.local;
+      this.finishNode(elt, "ExportSpecifier");
+      elts.push(elt);
+      this.eat(acorn.tokTypes.comma);
     }
     this.eat(acorn.tokTypes.braceR);
     this.popCx();
-  }
-  return elts
-};
-
-lp$1.parseExportSpecifierList = function() {
-  var this$1 = this;
-
-  var elts = [];
-  var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
-  this.pushCx();
-  this.eat(acorn.tokTypes.braceL);
-  if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
-  while (!this.closes(acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-    if (this$1.isContextual("from")) { break }
-    var elt = this$1.startNode();
-    elt.local = this$1.parseIdent();
-    if (isDummy(elt.local)) { break }
-    elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local;
-    this$1.finishNode(elt, "ExportSpecifier");
-    elts.push(elt);
-    this$1.eat(acorn.tokTypes.comma);
-  }
-  this.eat(acorn.tokTypes.braceR);
-  this.popCx();
-  return elts
-};
-
-var lp$2 = LooseParser.prototype;
-
-lp$2.checkLVal = function(expr) {
-  if (!expr) { return expr }
-  switch (expr.type) {
-  case "Identifier":
-  case "MemberExpression":
-    return expr
-
-  case "ParenthesizedExpression":
-    expr.expression = this.checkLVal(expr.expression);
-    return expr
-
-  default:
-    return this.dummyIdent()
-  }
-};
+    return elts
+  };
 
-lp$2.parseExpression = function(noIn) {
-  var this$1 = this;
+  var lp$2 = LooseParser.prototype;
 
-  var start = this.storeCurrentPos();
-  var expr = this.parseMaybeAssign(noIn);
-  if (this.tok.type === acorn.tokTypes.comma) {
-    var node = this.startNodeAt(start);
-    node.expressions = [expr];
-    while (this.eat(acorn.tokTypes.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn)); }
-    return this.finishNode(node, "SequenceExpression")
-  }
-  return expr
-};
+  lp$2.checkLVal = function(expr) {
+    if (!expr) { return expr }
+    switch (expr.type) {
+    case "Identifier":
+    case "MemberExpression":
+      return expr
 
-lp$2.parseParenExpression = function() {
-  this.pushCx();
-  this.expect(acorn.tokTypes.parenL);
-  var val = this.parseExpression();
-  this.popCx();
-  this.expect(acorn.tokTypes.parenR);
-  return val
-};
+    case "ParenthesizedExpression":
+      expr.expression = this.checkLVal(expr.expression);
+      return expr
 
-lp$2.parseMaybeAssign = function(noIn) {
-  if (this.toks.isContextual("yield")) {
-    var node = this.startNode();
-    this.next();
-    if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type !== acorn.tokTypes.star && !this.tok.type.startsExpr)) {
-      node.delegate = false;
-      node.argument = null;
-    } else {
-      node.delegate = this.eat(acorn.tokTypes.star);
-      node.argument = this.parseMaybeAssign();
+    default:
+      return this.dummyIdent()
     }
-    return this.finishNode(node, "YieldExpression")
-  }
-
-  var start = this.storeCurrentPos();
-  var left = this.parseMaybeConditional(noIn);
-  if (this.tok.type.isAssign) {
-    var node$1 = this.startNodeAt(start);
-    node$1.operator = this.tok.value;
-    node$1.left = this.tok.type === acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left);
-    this.next();
-    node$1.right = this.parseMaybeAssign(noIn);
-    return this.finishNode(node$1, "AssignmentExpression")
-  }
-  return left
-};
+  };
 
-lp$2.parseMaybeConditional = function(noIn) {
-  var start = this.storeCurrentPos();
-  var expr = this.parseExprOps(noIn);
-  if (this.eat(acorn.tokTypes.question)) {
-    var node = this.startNodeAt(start);
-    node.test = expr;
-    node.consequent = this.parseMaybeAssign();
-    node.alternate = this.expect(acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent();
-    return this.finishNode(node, "ConditionalExpression")
-  }
-  return expr
-};
+  lp$2.parseExpression = function(noIn) {
+    var start = this.storeCurrentPos();
+    var expr = this.parseMaybeAssign(noIn);
+    if (this.tok.type === acorn.tokTypes.comma) {
+      var node = this.startNodeAt(start);
+      node.expressions = [expr];
+      while (this.eat(acorn.tokTypes.comma)) { node.expressions.push(this.parseMaybeAssign(noIn)); }
+      return this.finishNode(node, "SequenceExpression")
+    }
+    return expr
+  };
 
-lp$2.parseExprOps = function(noIn) {
-  var start = this.storeCurrentPos();
-  var indent = this.curIndent, line = this.curLineStart;
-  return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
-};
+  lp$2.parseParenExpression = function() {
+    this.pushCx();
+    this.expect(acorn.tokTypes.parenL);
+    var val = this.parseExpression();
+    this.popCx();
+    this.expect(acorn.tokTypes.parenR);
+    return val
+  };
 
-lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
-  if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { return left }
-  var prec = this.tok.type.binop;
-  if (prec != null && (!noIn || this.tok.type !== acorn.tokTypes._in)) {
-    if (prec > minPrec) {
-      var node = this.startNodeAt(start);
-      node.left = left;
-      node.operator = this.tok.value;
+  lp$2.parseMaybeAssign = function(noIn) {
+    if (this.toks.isContextual("yield")) {
+      var node = this.startNode();
       this.next();
-      if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) {
-        node.right = this.dummyIdent();
+      if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type !== acorn.tokTypes.star && !this.tok.type.startsExpr)) {
+        node.delegate = false;
+        node.argument = null;
       } else {
-        var rightStart = this.storeCurrentPos();
-        node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line);
+        node.delegate = this.eat(acorn.tokTypes.star);
+        node.argument = this.parseMaybeAssign();
       }
-      this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression");
-      return this.parseExprOp(node, start, minPrec, noIn, indent, line)
+      return this.finishNode(node, "YieldExpression")
     }
-  }
-  return left
-};
 
-lp$2.parseMaybeUnary = function(sawUnary) {
-  var this$1 = this;
-
-  var start = this.storeCurrentPos(), expr;
-  if (this.options.ecmaVersion >= 8 && this.toks.isContextual("await") &&
-    (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))
-  ) {
-    expr = this.parseAwait();
-    sawUnary = true;
-  } else if (this.tok.type.prefix) {
-    var node = this.startNode(), update = this.tok.type === acorn.tokTypes.incDec;
-    if (!update) { sawUnary = true; }
-    node.operator = this.tok.value;
-    node.prefix = true;
-    this.next();
-    node.argument = this.parseMaybeUnary(true);
-    if (update) { node.argument = this.checkLVal(node.argument); }
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
-  } else if (this.tok.type === acorn.tokTypes.ellipsis) {
-    var node$1 = this.startNode();
-    this.next();
-    node$1.argument = this.parseMaybeUnary(sawUnary);
-    expr = this.finishNode(node$1, "SpreadElement");
-  } else {
-    expr = this.parseExprSubscripts();
-    while (this.tok.type.postfix && !this.canInsertSemicolon()) {
-      var node$2 = this$1.startNodeAt(start);
-      node$2.operator = this$1.tok.value;
-      node$2.prefix = false;
-      node$2.argument = this$1.checkLVal(expr);
-      this$1.next();
-      expr = this$1.finishNode(node$2, "UpdateExpression");
+    var start = this.storeCurrentPos();
+    var left = this.parseMaybeConditional(noIn);
+    if (this.tok.type.isAssign) {
+      var node$1 = this.startNodeAt(start);
+      node$1.operator = this.tok.value;
+      node$1.left = this.tok.type === acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left);
+      this.next();
+      node$1.right = this.parseMaybeAssign(noIn);
+      return this.finishNode(node$1, "AssignmentExpression")
     }
-  }
-
-  if (!sawUnary && this.eat(acorn.tokTypes.starstar)) {
-    var node$3 = this.startNodeAt(start);
-    node$3.operator = "**";
-    node$3.left = expr;
-    node$3.right = this.parseMaybeUnary(false);
-    return this.finishNode(node$3, "BinaryExpression")
-  }
-
-  return expr
-};
+    return left
+  };
 
-lp$2.parseExprSubscripts = function() {
-  var start = this.storeCurrentPos();
-  return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
-};
+  lp$2.parseMaybeConditional = function(noIn) {
+    var start = this.storeCurrentPos();
+    var expr = this.parseExprOps(noIn);
+    if (this.eat(acorn.tokTypes.question)) {
+      var node = this.startNodeAt(start);
+      node.test = expr;
+      node.consequent = this.parseMaybeAssign();
+      node.alternate = this.expect(acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent();
+      return this.finishNode(node, "ConditionalExpression")
+    }
+    return expr
+  };
 
-lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
-  var this$1 = this;
+  lp$2.parseExprOps = function(noIn) {
+    var start = this.storeCurrentPos();
+    var indent = this.curIndent, line = this.curLineStart;
+    return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
+  };
 
-  for (;;) {
-    if (this$1.curLineStart !== line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) {
-      if (this$1.tok.type === acorn.tokTypes.dot && this$1.curIndent === startIndent)
-        { --startIndent; }
-      else
-        { return base }
+  lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
+    if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { return left }
+    var prec = this.tok.type.binop;
+    if (prec != null && (!noIn || this.tok.type !== acorn.tokTypes._in)) {
+      if (prec > minPrec) {
+        var node = this.startNodeAt(start);
+        node.left = left;
+        node.operator = this.tok.value;
+        this.next();
+        if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) {
+          node.right = this.dummyIdent();
+        } else {
+          var rightStart = this.storeCurrentPos();
+          node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line);
+        }
+        this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression");
+        return this.parseExprOp(node, start, minPrec, noIn, indent, line)
+      }
     }
+    return left
+  };
 
-    var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon();
-
-    if (this$1.eat(acorn.tokTypes.dot)) {
-      var node = this$1.startNodeAt(start);
-      node.object = base;
-      if (this$1.curLineStart !== line && this$1.curIndent <= startIndent && this$1.tokenStartsLine())
-        { node.property = this$1.dummyIdent(); }
-      else
-        { node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent(); }
-      node.computed = false;
-      base = this$1.finishNode(node, "MemberExpression");
-    } else if (this$1.tok.type === acorn.tokTypes.bracketL) {
-      this$1.pushCx();
-      this$1.next();
-      var node$1 = this$1.startNodeAt(start);
-      node$1.object = base;
-      node$1.property = this$1.parseExpression();
-      node$1.computed = true;
-      this$1.popCx();
-      this$1.expect(acorn.tokTypes.bracketR);
-      base = this$1.finishNode(node$1, "MemberExpression");
-    } else if (!noCalls && this$1.tok.type === acorn.tokTypes.parenL) {
-      var exprList = this$1.parseExprList(acorn.tokTypes.parenR);
-      if (maybeAsyncArrow && this$1.eat(acorn.tokTypes.arrow))
-        { return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true) }
-      var node$2 = this$1.startNodeAt(start);
-      node$2.callee = base;
-      node$2.arguments = exprList;
-      base = this$1.finishNode(node$2, "CallExpression");
-    } else if (this$1.tok.type === acorn.tokTypes.backQuote) {
-      var node$3 = this$1.startNodeAt(start);
-      node$3.tag = base;
-      node$3.quasi = this$1.parseTemplate();
-      base = this$1.finishNode(node$3, "TaggedTemplateExpression");
+  lp$2.parseMaybeUnary = function(sawUnary) {
+    var start = this.storeCurrentPos(), expr;
+    if (this.options.ecmaVersion >= 8 && this.toks.isContextual("await") &&
+      (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))
+    ) {
+      expr = this.parseAwait();
+      sawUnary = true;
+    } else if (this.tok.type.prefix) {
+      var node = this.startNode(), update = this.tok.type === acorn.tokTypes.incDec;
+      if (!update) { sawUnary = true; }
+      node.operator = this.tok.value;
+      node.prefix = true;
+      this.next();
+      node.argument = this.parseMaybeUnary(true);
+      if (update) { node.argument = this.checkLVal(node.argument); }
+      expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
+    } else if (this.tok.type === acorn.tokTypes.ellipsis) {
+      var node$1 = this.startNode();
+      this.next();
+      node$1.argument = this.parseMaybeUnary(sawUnary);
+      expr = this.finishNode(node$1, "SpreadElement");
     } else {
-      return base
+      expr = this.parseExprSubscripts();
+      while (this.tok.type.postfix && !this.canInsertSemicolon()) {
+        var node$2 = this.startNodeAt(start);
+        node$2.operator = this.tok.value;
+        node$2.prefix = false;
+        node$2.argument = this.checkLVal(expr);
+        this.next();
+        expr = this.finishNode(node$2, "UpdateExpression");
+      }
     }
-  }
-};
 
-lp$2.parseExprAtom = function() {
-  var node;
-  switch (this.tok.type) {
-  case acorn.tokTypes._this:
-  case acorn.tokTypes._super:
-    var type = this.tok.type === acorn.tokTypes._this ? "ThisExpression" : "Super";
-    node = this.startNode();
-    this.next();
-    return this.finishNode(node, type)
+    if (!sawUnary && this.eat(acorn.tokTypes.starstar)) {
+      var node$3 = this.startNodeAt(start);
+      node$3.operator = "**";
+      node$3.left = expr;
+      node$3.right = this.parseMaybeUnary(false);
+      return this.finishNode(node$3, "BinaryExpression")
+    }
 
-  case acorn.tokTypes.name:
+    return expr
+  };
+
+  lp$2.parseExprSubscripts = function() {
     var start = this.storeCurrentPos();
-    var id = this.parseIdent();
-    var isAsync = false;
-    if (id.name === "async" && !this.canInsertSemicolon()) {
-      if (this.eat(acorn.tokTypes._function))
-        { return this.parseFunction(this.startNodeAt(start), false, true) }
-      if (this.tok.type === acorn.tokTypes.name) {
-        id = this.parseIdent();
-        isAsync = true;
+    return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
+  };
+
+  lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
+    for (;;) {
+      if (this.curLineStart !== line && this.curIndent <= startIndent && this.tokenStartsLine()) {
+        if (this.tok.type === acorn.tokTypes.dot && this.curIndent === startIndent)
+          { --startIndent; }
+        else
+          { return base }
+      }
+
+      var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this.canInsertSemicolon();
+
+      if (this.eat(acorn.tokTypes.dot)) {
+        var node = this.startNodeAt(start);
+        node.object = base;
+        if (this.curLineStart !== line && this.curIndent <= startIndent && this.tokenStartsLine())
+          { node.property = this.dummyIdent(); }
+        else
+          { node.property = this.parsePropertyAccessor() || this.dummyIdent(); }
+        node.computed = false;
+        base = this.finishNode(node, "MemberExpression");
+      } else if (this.tok.type === acorn.tokTypes.bracketL) {
+        this.pushCx();
+        this.next();
+        var node$1 = this.startNodeAt(start);
+        node$1.object = base;
+        node$1.property = this.parseExpression();
+        node$1.computed = true;
+        this.popCx();
+        this.expect(acorn.tokTypes.bracketR);
+        base = this.finishNode(node$1, "MemberExpression");
+      } else if (!noCalls && this.tok.type === acorn.tokTypes.parenL) {
+        var exprList = this.parseExprList(acorn.tokTypes.parenR);
+        if (maybeAsyncArrow && this.eat(acorn.tokTypes.arrow))
+          { return this.parseArrowExpression(this.startNodeAt(start), exprList, true) }
+        var node$2 = this.startNodeAt(start);
+        node$2.callee = base;
+        node$2.arguments = exprList;
+        base = this.finishNode(node$2, "CallExpression");
+      } else if (this.tok.type === acorn.tokTypes.backQuote) {
+        var node$3 = this.startNodeAt(start);
+        node$3.tag = base;
+        node$3.quasi = this.parseTemplate();
+        base = this.finishNode(node$3, "TaggedTemplateExpression");
+      } else {
+        return base
       }
     }
-    return this.eat(acorn.tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id
+  };
 
-  case acorn.tokTypes.regexp:
-    node = this.startNode();
-    var val = this.tok.value;
-    node.regex = {pattern: val.pattern, flags: val.flags};
-    node.value = val.value;
-    node.raw = this.input.slice(this.tok.start, this.tok.end);
-    this.next();
-    return this.finishNode(node, "Literal")
+  lp$2.parseExprAtom = function() {
+    var node;
+    switch (this.tok.type) {
+    case acorn.tokTypes._this:
+    case acorn.tokTypes._super:
+      var type = this.tok.type === acorn.tokTypes._this ? "ThisExpression" : "Super";
+      node = this.startNode();
+      this.next();
+      return this.finishNode(node, type)
+
+    case acorn.tokTypes.name:
+      var start = this.storeCurrentPos();
+      var id = this.parseIdent();
+      var isAsync = false;
+      if (id.name === "async" && !this.canInsertSemicolon()) {
+        if (this.eat(acorn.tokTypes._function))
+          { return this.parseFunction(this.startNodeAt(start), false, true) }
+        if (this.tok.type === acorn.tokTypes.name) {
+          id = this.parseIdent();
+          isAsync = true;
+        }
+      }
+      return this.eat(acorn.tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id
+
+    case acorn.tokTypes.regexp:
+      node = this.startNode();
+      var val = this.tok.value;
+      node.regex = {pattern: val.pattern, flags: val.flags};
+      node.value = val.value;
+      node.raw = this.input.slice(this.tok.start, this.tok.end);
+      this.next();
+      return this.finishNode(node, "Literal")
 
-  case acorn.tokTypes.num: case acorn.tokTypes.string:
-    node = this.startNode();
-    node.value = this.tok.value;
-    node.raw = this.input.slice(this.tok.start, this.tok.end);
-    this.next();
-    return this.finishNode(node, "Literal")
+    case acorn.tokTypes.num: case acorn.tokTypes.string:
+      node = this.startNode();
+      node.value = this.tok.value;
+      node.raw = this.input.slice(this.tok.start, this.tok.end);
+      if (this.tok.type === acorn.tokTypes.num && node.raw.charCodeAt(node.raw.length - 1) === 110) { node.bigint = node.raw.slice(0, -1); }
+      this.next();
+      return this.finishNode(node, "Literal")
 
-  case acorn.tokTypes._null: case acorn.tokTypes._true: case acorn.tokTypes._false:
-    node = this.startNode();
-    node.value = this.tok.type === acorn.tokTypes._null ? null : this.tok.type === acorn.tokTypes._true;
-    node.raw = this.tok.type.keyword;
-    this.next();
-    return this.finishNode(node, "Literal")
+    case acorn.tokTypes._null: case acorn.tokTypes._true: case acorn.tokTypes._false:
+      node = this.startNode();
+      node.value = this.tok.type === acorn.tokTypes._null ? null : this.tok.type === acorn.tokTypes._true;
+      node.raw = this.tok.type.keyword;
+      this.next();
+      return this.finishNode(node, "Literal")
 
-  case acorn.tokTypes.parenL:
-    var parenStart = this.storeCurrentPos();
-    this.next();
-    var inner = this.parseExpression();
-    this.expect(acorn.tokTypes.parenR);
-    if (this.eat(acorn.tokTypes.arrow)) {
-      // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
-      var params = inner.expressions || [inner];
-      if (params.length && isDummy(params[params.length - 1]))
-        { params.pop(); }
-      return this.parseArrowExpression(this.startNodeAt(parenStart), params)
-    }
-    if (this.options.preserveParens) {
-      var par = this.startNodeAt(parenStart);
-      par.expression = inner;
-      inner = this.finishNode(par, "ParenthesizedExpression");
-    }
-    return inner
+    case acorn.tokTypes.parenL:
+      var parenStart = this.storeCurrentPos();
+      this.next();
+      var inner = this.parseExpression();
+      this.expect(acorn.tokTypes.parenR);
+      if (this.eat(acorn.tokTypes.arrow)) {
+        // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
+        var params = inner.expressions || [inner];
+        if (params.length && isDummy(params[params.length - 1]))
+          { params.pop(); }
+        return this.parseArrowExpression(this.startNodeAt(parenStart), params)
+      }
+      if (this.options.preserveParens) {
+        var par = this.startNodeAt(parenStart);
+        par.expression = inner;
+        inner = this.finishNode(par, "ParenthesizedExpression");
+      }
+      return inner
 
-  case acorn.tokTypes.bracketL:
-    node = this.startNode();
-    node.elements = this.parseExprList(acorn.tokTypes.bracketR, true);
-    return this.finishNode(node, "ArrayExpression")
+    case acorn.tokTypes.bracketL:
+      node = this.startNode();
+      node.elements = this.parseExprList(acorn.tokTypes.bracketR, true);
+      return this.finishNode(node, "ArrayExpression")
 
-  case acorn.tokTypes.braceL:
-    return this.parseObj()
+    case acorn.tokTypes.braceL:
+      return this.parseObj()
 
-  case acorn.tokTypes._class:
-    return this.parseClass(false)
+    case acorn.tokTypes._class:
+      return this.parseClass(false)
 
-  case acorn.tokTypes._function:
-    node = this.startNode();
-    this.next();
-    return this.parseFunction(node, false)
+    case acorn.tokTypes._function:
+      node = this.startNode();
+      this.next();
+      return this.parseFunction(node, false)
 
-  case acorn.tokTypes._new:
-    return this.parseNew()
+    case acorn.tokTypes._new:
+      return this.parseNew()
 
-  case acorn.tokTypes.backQuote:
-    return this.parseTemplate()
+    case acorn.tokTypes.backQuote:
+      return this.parseTemplate()
 
-  default:
-    return this.dummyIdent()
-  }
-};
+    case acorn.tokTypes._import:
+      if (this.options.ecmaVersion >= 11) {
+        return this.parseExprImport()
+      } else {
+        return this.dummyIdent()
+      }
 
-lp$2.parseNew = function() {
-  var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart;
-  var meta = this.parseIdent(true);
-  if (this.options.ecmaVersion >= 6 && this.eat(acorn.tokTypes.dot)) {
-    node.meta = meta;
-    node.property = this.parseIdent(true);
-    return this.finishNode(node, "MetaProperty")
-  }
-  var start = this.storeCurrentPos();
-  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line);
-  if (this.tok.type === acorn.tokTypes.parenL) {
-    node.arguments = this.parseExprList(acorn.tokTypes.parenR);
-  } else {
-    node.arguments = [];
-  }
-  return this.finishNode(node, "NewExpression")
-};
+    default:
+      return this.dummyIdent()
+    }
+  };
 
-lp$2.parseTemplateElement = function() {
-  var elem = this.startNode();
+  lp$2.parseExprImport = function() {
+    var node = this.startNode();
+    this.next(); // skip `import`
+    switch (this.tok.type) {
+    case acorn.tokTypes.parenL:
+      return this.parseDynamicImport(node)
+    default:
+      node.name = "import";
+      return this.finishNode(node, "Identifier")
+    }
+  };
 
-  // The loose parser accepts invalid unicode escapes even in untagged templates.
-  if (this.tok.type === acorn.tokTypes.invalidTemplate) {
-    elem.value = {
-      raw: this.tok.value,
-      cooked: null
-    };
-  } else {
-    elem.value = {
-      raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
-      cooked: this.tok.value
-    };
-  }
-  this.next();
-  elem.tail = this.tok.type === acorn.tokTypes.backQuote;
-  return this.finishNode(elem, "TemplateElement")
-};
+  lp$2.parseDynamicImport = function(node) {
+    node.source = this.parseExprList(acorn.tokTypes.parenR)[0] || this.dummyString();
+    return this.finishNode(node, "ImportExpression")
+  };
 
-lp$2.parseTemplate = function() {
-  var this$1 = this;
-
-  var node = this.startNode();
-  this.next();
-  node.expressions = [];
-  var curElt = this.parseTemplateElement();
-  node.quasis = [curElt];
-  while (!curElt.tail) {
-    this$1.next();
-    node.expressions.push(this$1.parseExpression());
-    if (this$1.expect(acorn.tokTypes.braceR)) {
-      curElt = this$1.parseTemplateElement();
+  lp$2.parseNew = function() {
+    var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart;
+    var meta = this.parseIdent(true);
+    if (this.options.ecmaVersion >= 6 && this.eat(acorn.tokTypes.dot)) {
+      node.meta = meta;
+      node.property = this.parseIdent(true);
+      return this.finishNode(node, "MetaProperty")
+    }
+    var start = this.storeCurrentPos();
+    node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line);
+    if (this.tok.type === acorn.tokTypes.parenL) {
+      node.arguments = this.parseExprList(acorn.tokTypes.parenR);
     } else {
-      curElt = this$1.startNode();
-      curElt.value = {cooked: "", raw: ""};
-      curElt.tail = true;
-      this$1.finishNode(curElt, "TemplateElement");
+      node.arguments = [];
     }
-    node.quasis.push(curElt);
-  }
-  this.expect(acorn.tokTypes.backQuote);
-  return this.finishNode(node, "TemplateLiteral")
-};
+    return this.finishNode(node, "NewExpression")
+  };
 
-lp$2.parseObj = function() {
-  var this$1 = this;
-
-  var node = this.startNode();
-  node.properties = [];
-  this.pushCx();
-  var indent = this.curIndent + 1, line = this.curLineStart;
-  this.eat(acorn.tokTypes.braceL);
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
-  while (!this.closes(acorn.tokTypes.braceR, indent, line)) {
-    var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0);
-    if (this$1.options.ecmaVersion >= 9 && this$1.eat(acorn.tokTypes.ellipsis)) {
-      prop.argument = this$1.parseMaybeAssign();
-      node.properties.push(this$1.finishNode(prop, "SpreadElement"));
-      this$1.eat(acorn.tokTypes.comma);
-      continue
-    }
-    if (this$1.options.ecmaVersion >= 6) {
-      start = this$1.storeCurrentPos();
-      prop.method = false;
-      prop.shorthand = false;
-      isGenerator = this$1.eat(acorn.tokTypes.star);
-    }
-    this$1.parsePropertyName(prop);
-    if (this$1.toks.isAsyncProp(prop)) {
-      isAsync = true;
-      isGenerator = this$1.options.ecmaVersion >= 9 && this$1.eat(acorn.tokTypes.star);
-      this$1.parsePropertyName(prop);
+  lp$2.parseTemplateElement = function() {
+    var elem = this.startNode();
+
+    // The loose parser accepts invalid unicode escapes even in untagged templates.
+    if (this.tok.type === acorn.tokTypes.invalidTemplate) {
+      elem.value = {
+        raw: this.tok.value,
+        cooked: null
+      };
     } else {
-      isAsync = false;
+      elem.value = {
+        raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
+        cooked: this.tok.value
+      };
     }
-    if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(acorn.tokTypes.comma); continue }
-    if (this$1.eat(acorn.tokTypes.colon)) {
-      prop.kind = "init";
-      prop.value = this$1.parseMaybeAssign();
-    } else if (this$1.options.ecmaVersion >= 6 && (this$1.tok.type === acorn.tokTypes.parenL || this$1.tok.type === acorn.tokTypes.braceL)) {
-      prop.kind = "init";
-      prop.method = true;
-      prop.value = this$1.parseMethod(isGenerator, isAsync);
-    } else if (this$1.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
-               !prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
-               (this$1.tok.type !== acorn.tokTypes.comma && this$1.tok.type !== acorn.tokTypes.braceR && this$1.tok.type !== acorn.tokTypes.eq)) {
-      prop.kind = prop.key.name;
-      this$1.parsePropertyName(prop);
-      prop.value = this$1.parseMethod(false);
-    } else {
-      prop.kind = "init";
-      if (this$1.options.ecmaVersion >= 6) {
-        if (this$1.eat(acorn.tokTypes.eq)) {
-          var assign = this$1.startNodeAt(start);
-          assign.operator = "=";
-          assign.left = prop.key;
-          assign.right = this$1.parseMaybeAssign();
-          prop.value = this$1.finishNode(assign, "AssignmentExpression");
-        } else {
-          prop.value = prop.key;
-        }
+    this.next();
+    elem.tail = this.tok.type === acorn.tokTypes.backQuote;
+    return this.finishNode(elem, "TemplateElement")
+  };
+
+  lp$2.parseTemplate = function() {
+    var node = this.startNode();
+    this.next();
+    node.expressions = [];
+    var curElt = this.parseTemplateElement();
+    node.quasis = [curElt];
+    while (!curElt.tail) {
+      this.next();
+      node.expressions.push(this.parseExpression());
+      if (this.expect(acorn.tokTypes.braceR)) {
+        curElt = this.parseTemplateElement();
       } else {
-        prop.value = this$1.dummyIdent();
+        curElt = this.startNode();
+        curElt.value = {cooked: "", raw: ""};
+        curElt.tail = true;
+        this.finishNode(curElt, "TemplateElement");
       }
-      prop.shorthand = true;
+      node.quasis.push(curElt);
     }
-    node.properties.push(this$1.finishNode(prop, "Property"));
-    this$1.eat(acorn.tokTypes.comma);
-  }
-  this.popCx();
-  if (!this.eat(acorn.tokTypes.braceR)) {
-    // If there is no closing brace, make the node span to the start
-    // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start;
-    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
-  }
-  return this.finishNode(node, "ObjectExpression")
-};
+    this.expect(acorn.tokTypes.backQuote);
+    return this.finishNode(node, "TemplateLiteral")
+  };
 
-lp$2.parsePropertyName = function(prop) {
-  if (this.options.ecmaVersion >= 6) {
-    if (this.eat(acorn.tokTypes.bracketL)) {
-      prop.computed = true;
-      prop.key = this.parseExpression();
-      this.expect(acorn.tokTypes.bracketR);
-      return
-    } else {
-      prop.computed = false;
+  lp$2.parseObj = function() {
+    var node = this.startNode();
+    node.properties = [];
+    this.pushCx();
+    var indent = this.curIndent + 1, line = this.curLineStart;
+    this.eat(acorn.tokTypes.braceL);
+    if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
+    while (!this.closes(acorn.tokTypes.braceR, indent, line)) {
+      var prop = this.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0);
+      if (this.options.ecmaVersion >= 9 && this.eat(acorn.tokTypes.ellipsis)) {
+        prop.argument = this.parseMaybeAssign();
+        node.properties.push(this.finishNode(prop, "SpreadElement"));
+        this.eat(acorn.tokTypes.comma);
+        continue
+      }
+      if (this.options.ecmaVersion >= 6) {
+        start = this.storeCurrentPos();
+        prop.method = false;
+        prop.shorthand = false;
+        isGenerator = this.eat(acorn.tokTypes.star);
+      }
+      this.parsePropertyName(prop);
+      if (this.toks.isAsyncProp(prop)) {
+        isAsync = true;
+        isGenerator = this.options.ecmaVersion >= 9 && this.eat(acorn.tokTypes.star);
+        this.parsePropertyName(prop);
+      } else {
+        isAsync = false;
+      }
+      if (isDummy(prop.key)) { if (isDummy(this.parseMaybeAssign())) { this.next(); } this.eat(acorn.tokTypes.comma); continue }
+      if (this.eat(acorn.tokTypes.colon)) {
+        prop.kind = "init";
+        prop.value = this.parseMaybeAssign();
+      } else if (this.options.ecmaVersion >= 6 && (this.tok.type === acorn.tokTypes.parenL || this.tok.type === acorn.tokTypes.braceL)) {
+        prop.kind = "init";
+        prop.method = true;
+        prop.value = this.parseMethod(isGenerator, isAsync);
+      } else if (this.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
+                 !prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
+                 (this.tok.type !== acorn.tokTypes.comma && this.tok.type !== acorn.tokTypes.braceR && this.tok.type !== acorn.tokTypes.eq)) {
+        prop.kind = prop.key.name;
+        this.parsePropertyName(prop);
+        prop.value = this.parseMethod(false);
+      } else {
+        prop.kind = "init";
+        if (this.options.ecmaVersion >= 6) {
+          if (this.eat(acorn.tokTypes.eq)) {
+            var assign = this.startNodeAt(start);
+            assign.operator = "=";
+            assign.left = prop.key;
+            assign.right = this.parseMaybeAssign();
+            prop.value = this.finishNode(assign, "AssignmentExpression");
+          } else {
+            prop.value = prop.key;
+          }
+        } else {
+          prop.value = this.dummyIdent();
+        }
+        prop.shorthand = true;
+      }
+      node.properties.push(this.finishNode(prop, "Property"));
+      this.eat(acorn.tokTypes.comma);
     }
-  }
-  var key = (this.tok.type === acorn.tokTypes.num || this.tok.type === acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent();
-  prop.key = key || this.dummyIdent();
-};
+    this.popCx();
+    if (!this.eat(acorn.tokTypes.braceR)) {
+      // If there is no closing brace, make the node span to the start
+      // of the next token (this is useful for Tern)
+      this.last.end = this.tok.start;
+      if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
+    }
+    return this.finishNode(node, "ObjectExpression")
+  };
 
-lp$2.parsePropertyAccessor = function() {
-  if (this.tok.type === acorn.tokTypes.name || this.tok.type.keyword) { return this.parseIdent() }
-};
+  lp$2.parsePropertyName = function(prop) {
+    if (this.options.ecmaVersion >= 6) {
+      if (this.eat(acorn.tokTypes.bracketL)) {
+        prop.computed = true;
+        prop.key = this.parseExpression();
+        this.expect(acorn.tokTypes.bracketR);
+        return
+      } else {
+        prop.computed = false;
+      }
+    }
+    var key = (this.tok.type === acorn.tokTypes.num || this.tok.type === acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent();
+    prop.key = key || this.dummyIdent();
+  };
 
-lp$2.parseIdent = function() {
-  var name = this.tok.type === acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword;
-  if (!name) { return this.dummyIdent() }
-  var node = this.startNode();
-  this.next();
-  node.name = name;
-  return this.finishNode(node, "Identifier")
-};
+  lp$2.parsePropertyAccessor = function() {
+    if (this.tok.type === acorn.tokTypes.name || this.tok.type.keyword) { return this.parseIdent() }
+  };
 
-lp$2.initFunction = function(node) {
-  node.id = null;
-  node.params = [];
-  if (this.options.ecmaVersion >= 6) {
-    node.generator = false;
-    node.expression = false;
-  }
-  if (this.options.ecmaVersion >= 8)
-    { node.async = false; }
-};
+  lp$2.parseIdent = function() {
+    var name = this.tok.type === acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword;
+    if (!name) { return this.dummyIdent() }
+    var node = this.startNode();
+    this.next();
+    node.name = name;
+    return this.finishNode(node, "Identifier")
+  };
 
-// Convert existing expression atom to assignable pattern
-// if possible.
-
-lp$2.toAssignable = function(node, binding) {
-  var this$1 = this;
-
-  if (!node || node.type === "Identifier" || (node.type === "MemberExpression" && !binding)) {
-    // Okay
-  } else if (node.type === "ParenthesizedExpression") {
-    this.toAssignable(node.expression, binding);
-  } else if (this.options.ecmaVersion < 6) {
-    return this.dummyIdent()
-  } else if (node.type === "ObjectExpression") {
-    node.type = "ObjectPattern";
-    for (var i = 0, list = node.properties; i < list.length; i += 1)
-      {
-      var prop = list[i];
+  lp$2.initFunction = function(node) {
+    node.id = null;
+    node.params = [];
+    if (this.options.ecmaVersion >= 6) {
+      node.generator = false;
+      node.expression = false;
+    }
+    if (this.options.ecmaVersion >= 8)
+      { node.async = false; }
+  };
 
-      this$1.toAssignable(prop, binding);
-    }
-  } else if (node.type === "ArrayExpression") {
-    node.type = "ArrayPattern";
-    this.toAssignableList(node.elements, binding);
-  } else if (node.type === "Property") {
-    this.toAssignable(node.value, binding);
-  } else if (node.type === "SpreadElement") {
-    node.type = "RestElement";
-    this.toAssignable(node.argument, binding);
-  } else if (node.type === "AssignmentExpression") {
-    node.type = "AssignmentPattern";
-    delete node.operator;
-  } else {
-    return this.dummyIdent()
-  }
-  return node
-};
+  // Convert existing expression atom to assignable pattern
+  // if possible.
 
-lp$2.toAssignableList = function(exprList, binding) {
-  var this$1 = this;
+  lp$2.toAssignable = function(node, binding) {
+    if (!node || node.type === "Identifier" || (node.type === "MemberExpression" && !binding)) ; else if (node.type === "ParenthesizedExpression") {
+      this.toAssignable(node.expression, binding);
+    } else if (this.options.ecmaVersion < 6) {
+      return this.dummyIdent()
+    } else if (node.type === "ObjectExpression") {
+      node.type = "ObjectPattern";
+      for (var i = 0, list = node.properties; i < list.length; i += 1)
+        {
+        var prop = list[i];
 
-  for (var i = 0, list = exprList; i < list.length; i += 1)
-    {
-    var expr = list[i];
+        this.toAssignable(prop, binding);
+      }
+    } else if (node.type === "ArrayExpression") {
+      node.type = "ArrayPattern";
+      this.toAssignableList(node.elements, binding);
+    } else if (node.type === "Property") {
+      this.toAssignable(node.value, binding);
+    } else if (node.type === "SpreadElement") {
+      node.type = "RestElement";
+      this.toAssignable(node.argument, binding);
+    } else if (node.type === "AssignmentExpression") {
+      node.type = "AssignmentPattern";
+      delete node.operator;
+    } else {
+      return this.dummyIdent()
+    }
+    return node
+  };
 
-    this$1.toAssignable(expr, binding);
-  }
-  return exprList
-};
+  lp$2.toAssignableList = function(exprList, binding) {
+    for (var i = 0, list = exprList; i < list.length; i += 1)
+      {
+      var expr = list[i];
 
-lp$2.parseFunctionParams = function(params) {
-  params = this.parseExprList(acorn.tokTypes.parenR);
-  return this.toAssignableList(params, true)
-};
+      this.toAssignable(expr, binding);
+    }
+    return exprList
+  };
 
-lp$2.parseMethod = function(isGenerator, isAsync) {
-  var node = this.startNode(), oldInAsync = this.inAsync, oldInFunction = this.inFunction;
-  this.initFunction(node);
-  if (this.options.ecmaVersion >= 6)
-    { node.generator = !!isGenerator; }
-  if (this.options.ecmaVersion >= 8)
-    { node.async = !!isAsync; }
-  this.inAsync = node.async;
-  this.inFunction = true;
-  node.params = this.parseFunctionParams();
-  node.body = this.parseBlock();
-  this.toks.adaptDirectivePrologue(node.body.body);
-  this.inAsync = oldInAsync;
-  this.inFunction = oldInFunction;
-  return this.finishNode(node, "FunctionExpression")
-};
+  lp$2.parseFunctionParams = function(params) {
+    params = this.parseExprList(acorn.tokTypes.parenR);
+    return this.toAssignableList(params, true)
+  };
 
-lp$2.parseArrowExpression = function(node, params, isAsync) {
-  var oldInAsync = this.inAsync, oldInFunction = this.inFunction;
-  this.initFunction(node);
-  if (this.options.ecmaVersion >= 8)
-    { node.async = !!isAsync; }
-  this.inAsync = node.async;
-  this.inFunction = true;
-  node.params = this.toAssignableList(params, true);
-  node.expression = this.tok.type !== acorn.tokTypes.braceL;
-  if (node.expression) {
-    node.body = this.parseMaybeAssign();
-  } else {
+  lp$2.parseMethod = function(isGenerator, isAsync) {
+    var node = this.startNode(), oldInAsync = this.inAsync, oldInFunction = this.inFunction;
+    this.initFunction(node);
+    if (this.options.ecmaVersion >= 6)
+      { node.generator = !!isGenerator; }
+    if (this.options.ecmaVersion >= 8)
+      { node.async = !!isAsync; }
+    this.inAsync = node.async;
+    this.inFunction = true;
+    node.params = this.parseFunctionParams();
     node.body = this.parseBlock();
     this.toks.adaptDirectivePrologue(node.body.body);
-  }
-  this.inAsync = oldInAsync;
-  this.inFunction = oldInFunction;
-  return this.finishNode(node, "ArrowFunctionExpression")
-};
+    this.inAsync = oldInAsync;
+    this.inFunction = oldInFunction;
+    return this.finishNode(node, "FunctionExpression")
+  };
 
-lp$2.parseExprList = function(close, allowEmpty) {
-  var this$1 = this;
-
-  this.pushCx();
-  var indent = this.curIndent, line = this.curLineStart, elts = [];
-  this.next(); // Opening bracket
-  while (!this.closes(close, indent + 1, line)) {
-    if (this$1.eat(acorn.tokTypes.comma)) {
-      elts.push(allowEmpty ? null : this$1.dummyIdent());
-      continue
-    }
-    var elt = this$1.parseMaybeAssign();
-    if (isDummy(elt)) {
-      if (this$1.closes(close, indent, line)) { break }
-      this$1.next();
+  lp$2.parseArrowExpression = function(node, params, isAsync) {
+    var oldInAsync = this.inAsync, oldInFunction = this.inFunction;
+    this.initFunction(node);
+    if (this.options.ecmaVersion >= 8)
+      { node.async = !!isAsync; }
+    this.inAsync = node.async;
+    this.inFunction = true;
+    node.params = this.toAssignableList(params, true);
+    node.expression = this.tok.type !== acorn.tokTypes.braceL;
+    if (node.expression) {
+      node.body = this.parseMaybeAssign();
     } else {
-      elts.push(elt);
+      node.body = this.parseBlock();
+      this.toks.adaptDirectivePrologue(node.body.body);
     }
-    this$1.eat(acorn.tokTypes.comma);
-  }
-  this.popCx();
-  if (!this.eat(close)) {
-    // If there is no closing brace, make the node span to the start
-    // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start;
-    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
-  }
-  return elts
-};
+    this.inAsync = oldInAsync;
+    this.inFunction = oldInFunction;
+    return this.finishNode(node, "ArrowFunctionExpression")
+  };
 
-lp$2.parseAwait = function() {
-  var node = this.startNode();
-  this.next();
-  node.argument = this.parseMaybeUnary();
-  return this.finishNode(node, "AwaitExpression")
-};
+  lp$2.parseExprList = function(close, allowEmpty) {
+    this.pushCx();
+    var indent = this.curIndent, line = this.curLineStart, elts = [];
+    this.next(); // Opening bracket
+    while (!this.closes(close, indent + 1, line)) {
+      if (this.eat(acorn.tokTypes.comma)) {
+        elts.push(allowEmpty ? null : this.dummyIdent());
+        continue
+      }
+      var elt = this.parseMaybeAssign();
+      if (isDummy(elt)) {
+        if (this.closes(close, indent, line)) { break }
+        this.next();
+      } else {
+        elts.push(elt);
+      }
+      this.eat(acorn.tokTypes.comma);
+    }
+    this.popCx();
+    if (!this.eat(close)) {
+      // If there is no closing brace, make the node span to the start
+      // of the next token (this is useful for Tern)
+      this.last.end = this.tok.start;
+      if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
+    }
+    return elts
+  };
 
-// Acorn: Loose parser
-//
-// This module provides an alternative parser that exposes that same
-// interface as the main module's `parse` function, but will try to
-// parse anything as JavaScript, repairing syntax error the best it
-// can. There are circumstances in which it will raise an error and
-// give up, but they are very rare. The resulting AST will be a mostly
-// valid JavaScript AST (as per the [Mozilla parser API][api], except
-// that:
-//
-// - Return outside functions is allowed
-//
-// - Label consistency (no conflicts, break only to existing labels)
-//   is not enforced.
-//
-// - Bogus Identifier nodes with a name of `"✖"` are inserted whenever
-//   the parser got too confused to return anything meaningful.
-//
-// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
-//
-// The expected use for this is to *first* try `acorn.parse`, and only
-// if that fails switch to the loose parser. The loose parser might
-// parse badly indented code incorrectly, so **don't** use it as your
-// default parser.
-//
-// Quite a lot of acorn.js is duplicated here. The alternative was to
-// add a *lot* of extra cruft to that file, making it less readable
-// and slower. Copying and editing the code allowed me to make
-// invasive changes and simplifications without creating a complicated
-// tangle.
-
-acorn.defaultOptions.tabSize = 4;
-
-function parse(input, options) {
-  return LooseParser.parse(input, options)
-}
+  lp$2.parseAwait = function() {
+    var node = this.startNode();
+    this.next();
+    node.argument = this.parseMaybeUnary();
+    return this.finishNode(node, "AwaitExpression")
+  };
+
+  // Acorn: Loose parser
 
-exports.parse = parse;
-exports.LooseParser = LooseParser;
+  acorn.defaultOptions.tabSize = 4;
 
-Object.defineProperty(exports, '__esModule', { value: true });
+  function parse(input, options) {
+    return LooseParser.parse(input, options)
+  }
 
-})));
+  exports.LooseParser = LooseParser;
+  exports.parse = parse;
 
+  Object.defineProperty(exports, '__esModule', { value: true });
+
+}));
 
 },{"acorn":14}],14:[function(require,module,exports){
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-	typeof define === 'function' && define.amd ? define(['exports'], factory) :
-	(factory((global.acorn = {})));
-}(this, (function (exports) { 'use strict';
-
-// Reserved word lists for various dialects of the language
-
-var reservedWords = {
-  3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
-  5: "class enum extends super const export import",
-  6: "enum",
-  strict: "implements interface let package private protected public static yield",
-  strictBind: "eval arguments"
-};
-
-// And the keywords
+  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+  typeof define === 'function' && define.amd ? define(['exports'], factory) :
+  (global = global || self, factory(global.acorn = {}));
+}(this, function (exports) { 'use strict';
+
+  // Reserved word lists for various dialects of the language
+
+  var reservedWords = {
+    3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
+    5: "class enum extends super const export import",
+    6: "enum",
+    strict: "implements interface let package private protected public static yield",
+    strictBind: "eval arguments"
+  };
 
-var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
+  // And the keywords
 
-var keywords = {
-  5: ecma5AndLessKeywords,
-  6: ecma5AndLessKeywords + " const class extends export import super"
-};
+  var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
 
-var keywordRelationalOperator = /^in(stanceof)?$/;
+  var keywords = {
+    5: ecma5AndLessKeywords,
+    "5module": ecma5AndLessKeywords + " export import",
+    6: ecma5AndLessKeywords + " const class extends export import super"
+  };
 
-// ## Character categories
+  var keywordRelationalOperator = /^in(stanceof)?$/;
 
-// Big ugly regular expressions that match characters in the
-// whitespace, identifier, and identifier-start categories. These
-// are only applied when a character is found to actually have a
-// code point above 128.
-// Generated by `bin/generate-identifier-regex.js`.
+  // ## Character categories
 
-var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7b9\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
-var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
+  // Big ugly regular expressions that match characters in the
+  // whitespace, identifier, and identifier-start categories. These
+  // are only applied when a character is found to actually have a
+  // code point above 128.
+  // Generated by `bin/generate-identifier-regex.js`.
+  var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7c6\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab67\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
+  var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
 
-var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
-var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
+  var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
+  var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
 
-nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
+  nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
 
-// These are a run-length and offset encoded representation of the
-// >0xffff code points that are a valid part of identifiers. The
-// offset starts at 0x10000, and each pair of numbers represents an
-// offset to the next range, and then a size of the range. They were
-// generated by bin/generate-identifier-regex.js
+  // These are a run-length and offset encoded representation of the
+  // >0xffff code points that are a valid part of identifiers. The
+  // offset starts at 0x10000, and each pair of numbers represents an
+  // offset to the next range, and then a size of the range. They were
+  // generated by bin/generate-identifier-regex.js
 
-// eslint-disable-next-line comma-spacing
-var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,190,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,26,230,43,117,63,32,0,257,0,11,39,8,0,22,0,12,39,3,3,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,68,12,0,67,12,65,1,31,6129,15,754,9486,286,82,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541];
+  // eslint-disable-next-line comma-spacing
+  var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,155,22,13,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,21,0,33,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,14,0,72,26,230,43,117,63,32,0,161,7,3,38,17,0,2,0,29,0,11,39,8,0,22,0,12,45,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,74,6,0,67,12,65,1,2,0,29,6135,9,754,9486,286,50,2,18,3,9,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,2357,44,11,6,17,0,370,43,1301,196,60,67,8,0,1205,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541];
 
-// eslint-disable-next-line comma-spacing
-var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,280,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
+  // eslint-disable-next-line comma-spacing
+  var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,232,6,3,6,4,0,29,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1014,0,2,54,8,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,262,6,10,9,419,13,1495,6,110,6,6,9,792487,239];
 
-// This has a complexity linear to the value of the code. The
-// assumption is that looking up astral identifier characters is
-// rare.
-function isInAstralSet(code, set) {
-  var pos = 0x10000;
-  for (var i = 0; i < set.length; i += 2) {
-    pos += set[i];
-    if (pos > code) { return false }
-    pos += set[i + 1];
-    if (pos >= code) { return true }
+  // This has a complexity linear to the value of the code. The
+  // assumption is that looking up astral identifier characters is
+  // rare.
+  function isInAstralSet(code, set) {
+    var pos = 0x10000;
+    for (var i = 0; i < set.length; i += 2) {
+      pos += set[i];
+      if (pos > code) { return false }
+      pos += set[i + 1];
+      if (pos >= code) { return true }
+    }
   }
-}
 
-// Test whether a given character code starts an identifier.
+  // Test whether a given character code starts an identifier.
 
-function isIdentifierStart(code, astral) {
-  if (code < 65) { return code === 36 }
-  if (code < 91) { return true }
-  if (code < 97) { return code === 95 }
-  if (code < 123) { return true }
-  if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) }
-  if (astral === false) { return false }
-  return isInAstralSet(code, astralIdentifierStartCodes)
-}
-
-// Test whether a given character is part of an identifier.
-
-function isIdentifierChar(code, astral) {
-  if (code < 48) { return code === 36 }
-  if (code < 58) { return true }
-  if (code < 65) { return false }
-  if (code < 91) { return true }
-  if (code < 97) { return code === 95 }
-  if (code < 123) { return true }
-  if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) }
-  if (astral === false) { return false }
-  return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
-}
-
-// ## Token types
-
-// The assignment of fine-grained, information-carrying type objects
-// allows the tokenizer to store the information it has about a
-// token in a way that is very cheap for the parser to look up.
-
-// All token type variables start with an underscore, to make them
-// easy to recognize.
-
-// The `beforeExpr` property is used to disambiguate between regular
-// expressions and divisions. It is set on all token types that can
-// be followed by an expression (thus, a slash after them would be a
-// regular expression).
-//
-// The `startsExpr` property is used to check if the token ends a
-// `yield` expression. It is set on all token types that either can
-// directly start an expression (like a quotation mark) or can
-// continue an expression (like the body of a string).
-//
-// `isLoop` marks a keyword as starting a loop, which is important
-// to know when parsing a label, in order to allow or disallow
-// continue jumps to that label.
-
-var TokenType = function TokenType(label, conf) {
-  if ( conf === void 0 ) conf = {};
-
-  this.label = label;
-  this.keyword = conf.keyword;
-  this.beforeExpr = !!conf.beforeExpr;
-  this.startsExpr = !!conf.startsExpr;
-  this.isLoop = !!conf.isLoop;
-  this.isAssign = !!conf.isAssign;
-  this.prefix = !!conf.prefix;
-  this.postfix = !!conf.postfix;
-  this.binop = conf.binop || null;
-  this.updateContext = null;
-};
+  function isIdentifierStart(code, astral) {
+    if (code < 65) { return code === 36 }
+    if (code < 91) { return true }
+    if (code < 97) { return code === 95 }
+    if (code < 123) { return true }
+    if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) }
+    if (astral === false) { return false }
+    return isInAstralSet(code, astralIdentifierStartCodes)
+  }
 
-function binop(name, prec) {
-  return new TokenType(name, {beforeExpr: true, binop: prec})
-}
-var beforeExpr = {beforeExpr: true};
-var startsExpr = {startsExpr: true};
+  // Test whether a given character is part of an identifier.
 
-// Map keyword names to token types.
+  function isIdentifierChar(code, astral) {
+    if (code < 48) { return code === 36 }
+    if (code < 58) { return true }
+    if (code < 65) { return false }
+    if (code < 91) { return true }
+    if (code < 97) { return code === 95 }
+    if (code < 123) { return true }
+    if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) }
+    if (astral === false) { return false }
+    return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
+  }
 
-var keywords$1 = {};
+  // ## Token types
 
-// Succinct definitions of keyword token types
-function kw(name, options) {
-  if ( options === void 0 ) options = {};
+  // The assignment of fine-grained, information-carrying type objects
+  // allows the tokenizer to store the information it has about a
+  // token in a way that is very cheap for the parser to look up.
 
-  options.keyword = name;
-  return keywords$1[name] = new TokenType(name, options)
-}
+  // All token type variables start with an underscore, to make them
+  // easy to recognize.
 
-var types = {
-  num: new TokenType("num", startsExpr),
-  regexp: new TokenType("regexp", startsExpr),
-  string: new TokenType("string", startsExpr),
-  name: new TokenType("name", startsExpr),
-  eof: new TokenType("eof"),
-
-  // Punctuation token types.
-  bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
-  bracketR: new TokenType("]"),
-  braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
-  braceR: new TokenType("}"),
-  parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
-  parenR: new TokenType(")"),
-  comma: new TokenType(",", beforeExpr),
-  semi: new TokenType(";", beforeExpr),
-  colon: new TokenType(":", beforeExpr),
-  dot: new TokenType("."),
-  question: new TokenType("?", beforeExpr),
-  arrow: new TokenType("=>", beforeExpr),
-  template: new TokenType("template"),
-  invalidTemplate: new TokenType("invalidTemplate"),
-  ellipsis: new TokenType("...", beforeExpr),
-  backQuote: new TokenType("`", startsExpr),
-  dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
-
-  // Operators. These carry several kinds of properties to help the
-  // parser use them properly (the presence of these properties is
-  // what categorizes them as operators).
-  //
-  // `binop`, when present, specifies that this operator is a binary
-  // operator, and will refer to its precedence.
+  // The `beforeExpr` property is used to disambiguate between regular
+  // expressions and divisions. It is set on all token types that can
+  // be followed by an expression (thus, a slash after them would be a
+  // regular expression).
   //
-  // `prefix` and `postfix` mark the operator as a prefix or postfix
-  // unary operator.
+  // The `startsExpr` property is used to check if the token ends a
+  // `yield` expression. It is set on all token types that either can
+  // directly start an expression (like a quotation mark) or can
+  // continue an expression (like the body of a string).
   //
-  // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
-  // binary operators with a very low precedence, that should result
-  // in AssignmentExpression nodes.
-
-  eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
-  assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
-  incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
-  prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}),
-  logicalOR: binop("||", 1),
-  logicalAND: binop("&&", 2),
-  bitwiseOR: binop("|", 3),
-  bitwiseXOR: binop("^", 4),
-  bitwiseAND: binop("&", 5),
-  equality: binop("==/!=/===/!==", 6),
-  relational: binop("</>/<=/>=", 7),
-  bitShift: binop("<</>>/>>>", 8),
-  plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
-  modulo: binop("%", 10),
-  star: binop("*", 10),
-  slash: binop("/", 10),
-  starstar: new TokenType("**", {beforeExpr: true}),
-
-  // Keyword token types.
-  _break: kw("break"),
-  _case: kw("case", beforeExpr),
-  _catch: kw("catch"),
-  _continue: kw("continue"),
-  _debugger: kw("debugger"),
-  _default: kw("default", beforeExpr),
-  _do: kw("do", {isLoop: true, beforeExpr: true}),
-  _else: kw("else", beforeExpr),
-  _finally: kw("finally"),
-  _for: kw("for", {isLoop: true}),
-  _function: kw("function", startsExpr),
-  _if: kw("if"),
-  _return: kw("return", beforeExpr),
-  _switch: kw("switch"),
-  _throw: kw("throw", beforeExpr),
-  _try: kw("try"),
-  _var: kw("var"),
-  _const: kw("const"),
-  _while: kw("while", {isLoop: true}),
-  _with: kw("with"),
-  _new: kw("new", {beforeExpr: true, startsExpr: true}),
-  _this: kw("this", startsExpr),
-  _super: kw("super", startsExpr),
-  _class: kw("class", startsExpr),
-  _extends: kw("extends", beforeExpr),
-  _export: kw("export"),
-  _import: kw("import"),
-  _null: kw("null", startsExpr),
-  _true: kw("true", startsExpr),
-  _false: kw("false", startsExpr),
-  _in: kw("in", {beforeExpr: true, binop: 7}),
-  _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
-  _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
-  _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
-  _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
-};
+  // `isLoop` marks a keyword as starting a loop, which is important
+  // to know when parsing a label, in order to allow or disallow
+  // continue jumps to that label.
+
+  var TokenType = function TokenType(label, conf) {
+    if ( conf === void 0 ) conf = {};
+
+    this.label = label;
+    this.keyword = conf.keyword;
+    this.beforeExpr = !!conf.beforeExpr;
+    this.startsExpr = !!conf.startsExpr;
+    this.isLoop = !!conf.isLoop;
+    this.isAssign = !!conf.isAssign;
+    this.prefix = !!conf.prefix;
+    this.postfix = !!conf.postfix;
+    this.binop = conf.binop || null;
+    this.updateContext = null;
+  };
 
-// Matches a whole line break (where CRLF is considered a single
-// line break). Used to count lines.
+  function binop(name, prec) {
+    return new TokenType(name, {beforeExpr: true, binop: prec})
+  }
+  var beforeExpr = {beforeExpr: true}, startsExpr = {startsExpr: true};
+
+  // Map keyword names to token types.
+
+  var keywords$1 = {};
+
+  // Succinct definitions of keyword token types
+  function kw(name, options) {
+    if ( options === void 0 ) options = {};
+
+    options.keyword = name;
+    return keywords$1[name] = new TokenType(name, options)
+  }
+
+  var types = {
+    num: new TokenType("num", startsExpr),
+    regexp: new TokenType("regexp", startsExpr),
+    string: new TokenType("string", startsExpr),
+    name: new TokenType("name", startsExpr),
+    eof: new TokenType("eof"),
+
+    // Punctuation token types.
+    bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
+    bracketR: new TokenType("]"),
+    braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
+    braceR: new TokenType("}"),
+    parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
+    parenR: new TokenType(")"),
+    comma: new TokenType(",", beforeExpr),
+    semi: new TokenType(";", beforeExpr),
+    colon: new TokenType(":", beforeExpr),
+    dot: new TokenType("."),
+    question: new TokenType("?", beforeExpr),
+    arrow: new TokenType("=>", beforeExpr),
+    template: new TokenType("template"),
+    invalidTemplate: new TokenType("invalidTemplate"),
+    ellipsis: new TokenType("...", beforeExpr),
+    backQuote: new TokenType("`", startsExpr),
+    dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
+
+    // Operators. These carry several kinds of properties to help the
+    // parser use them properly (the presence of these properties is
+    // what categorizes them as operators).
+    //
+    // `binop`, when present, specifies that this operator is a binary
+    // operator, and will refer to its precedence.
+    //
+    // `prefix` and `postfix` mark the operator as a prefix or postfix
+    // unary operator.
+    //
+    // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
+    // binary operators with a very low precedence, that should result
+    // in AssignmentExpression nodes.
+
+    eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
+    assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
+    incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
+    prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}),
+    logicalOR: binop("||", 1),
+    logicalAND: binop("&&", 2),
+    bitwiseOR: binop("|", 3),
+    bitwiseXOR: binop("^", 4),
+    bitwiseAND: binop("&", 5),
+    equality: binop("==/!=/===/!==", 6),
+    relational: binop("</>/<=/>=", 7),
+    bitShift: binop("<</>>/>>>", 8),
+    plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
+    modulo: binop("%", 10),
+    star: binop("*", 10),
+    slash: binop("/", 10),
+    starstar: new TokenType("**", {beforeExpr: true}),
+
+    // Keyword token types.
+    _break: kw("break"),
+    _case: kw("case", beforeExpr),
+    _catch: kw("catch"),
+    _continue: kw("continue"),
+    _debugger: kw("debugger"),
+    _default: kw("default", beforeExpr),
+    _do: kw("do", {isLoop: true, beforeExpr: true}),
+    _else: kw("else", beforeExpr),
+    _finally: kw("finally"),
+    _for: kw("for", {isLoop: true}),
+    _function: kw("function", startsExpr),
+    _if: kw("if"),
+    _return: kw("return", beforeExpr),
+    _switch: kw("switch"),
+    _throw: kw("throw", beforeExpr),
+    _try: kw("try"),
+    _var: kw("var"),
+    _const: kw("const"),
+    _while: kw("while", {isLoop: true}),
+    _with: kw("with"),
+    _new: kw("new", {beforeExpr: true, startsExpr: true}),
+    _this: kw("this", startsExpr),
+    _super: kw("super", startsExpr),
+    _class: kw("class", startsExpr),
+    _extends: kw("extends", beforeExpr),
+    _export: kw("export"),
+    _import: kw("import", startsExpr),
+    _null: kw("null", startsExpr),
+    _true: kw("true", startsExpr),
+    _false: kw("false", startsExpr),
+    _in: kw("in", {beforeExpr: true, binop: 7}),
+    _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
+    _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
+    _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
+    _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
+  };
 
-var lineBreak = /\r\n?|\n|\u2028|\u2029/;
-var lineBreakG = new RegExp(lineBreak.source, "g");
+  // Matches a whole line break (where CRLF is considered a single
+  // line break). Used to count lines.
 
-function isNewLine(code, ecma2019String) {
-  return code === 10 || code === 13 || (!ecma2019String && (code === 0x2028 || code === 0x2029))
-}
+  var lineBreak = /\r\n?|\n|\u2028|\u2029/;
+  var lineBreakG = new RegExp(lineBreak.source, "g");
 
-var nonASCIIwhitespace = /[\u1680\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
+  function isNewLine(code, ecma2019String) {
+    return code === 10 || code === 13 || (!ecma2019String && (code === 0x2028 || code === 0x2029))
+  }
 
-var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
+  var nonASCIIwhitespace = /[\u1680\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
 
-var ref = Object.prototype;
-var hasOwnProperty = ref.hasOwnProperty;
-var toString = ref.toString;
+  var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
 
-// Checks if an object has a property.
+  var ref = Object.prototype;
+  var hasOwnProperty = ref.hasOwnProperty;
+  var toString = ref.toString;
 
-function has(obj, propName) {
-  return hasOwnProperty.call(obj, propName)
-}
+  // Checks if an object has a property.
 
-var isArray = Array.isArray || (function (obj) { return (
-  toString.call(obj) === "[object Array]"
-); });
+  function has(obj, propName) {
+    return hasOwnProperty.call(obj, propName)
+  }
 
-function wordsRegexp(words) {
-  return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$")
-}
+  var isArray = Array.isArray || (function (obj) { return (
+    toString.call(obj) === "[object Array]"
+  ); });
 
-// These are used when `options.locations` is on, for the
-// `startLoc` and `endLoc` properties.
+  function wordsRegexp(words) {
+    return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$")
+  }
 
-var Position = function Position(line, col) {
-  this.line = line;
-  this.column = col;
-};
+  // These are used when `options.locations` is on, for the
+  // `startLoc` and `endLoc` properties.
 
-Position.prototype.offset = function offset (n) {
-  return new Position(this.line, this.column + n)
-};
+  var Position = function Position(line, col) {
+    this.line = line;
+    this.column = col;
+  };
 
-var SourceLocation = function SourceLocation(p, start, end) {
-  this.start = start;
-  this.end = end;
-  if (p.sourceFile !== null) { this.source = p.sourceFile; }
-};
+  Position.prototype.offset = function offset (n) {
+    return new Position(this.line, this.column + n)
+  };
 
-// The `getLineInfo` function is mostly useful when the
-// `locations` option is off (for performance reasons) and you
-// want to find the line/column position for a given character
-// offset. `input` should be the code string that the offset refers
-// into.
-
-function getLineInfo(input, offset) {
-  for (var line = 1, cur = 0;;) {
-    lineBreakG.lastIndex = cur;
-    var match = lineBreakG.exec(input);
-    if (match && match.index < offset) {
-      ++line;
-      cur = match.index + match[0].length;
-    } else {
-      return new Position(line, offset - cur)
+  var SourceLocation = function SourceLocation(p, start, end) {
+    this.start = start;
+    this.end = end;
+    if (p.sourceFile !== null) { this.source = p.sourceFile; }
+  };
+
+  // The `getLineInfo` function is mostly useful when the
+  // `locations` option is off (for performance reasons) and you
+  // want to find the line/column position for a given character
+  // offset. `input` should be the code string that the offset refers
+  // into.
+
+  function getLineInfo(input, offset) {
+    for (var line = 1, cur = 0;;) {
+      lineBreakG.lastIndex = cur;
+      var match = lineBreakG.exec(input);
+      if (match && match.index < offset) {
+        ++line;
+        cur = match.index + match[0].length;
+      } else {
+        return new Position(line, offset - cur)
+      }
     }
   }
-}
 
-// A second optional argument can be given to further configure
-// the parser process. These options are recognized:
-
-var defaultOptions = {
-  // `ecmaVersion` indicates the ECMAScript version to parse. Must be
-  // either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018), or 10
-  // (2019). This influences support for strict mode, the set of
-  // reserved words, and support for new syntax features. The default
-  // is 9.
-  ecmaVersion: 9,
-  // `sourceType` indicates the mode the code should be parsed in.
-  // Can be either `"script"` or `"module"`. This influences global
-  // strict mode and parsing of `import` and `export` declarations.
-  sourceType: "script",
-  // `onInsertedSemicolon` can be a callback that will be called
-  // when a semicolon is automatically inserted. It will be passed
-  // the position of the comma as an offset, and if `locations` is
-  // enabled, it is given the location as a `{line, column}` object
-  // as second argument.
-  onInsertedSemicolon: null,
-  // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
-  // trailing commas.
-  onTrailingComma: null,
-  // By default, reserved words are only enforced if ecmaVersion >= 5.
-  // Set `allowReserved` to a boolean value to explicitly turn this on
-  // an off. When this option has the value "never", reserved words
-  // and keywords can also not be used as property names.
-  allowReserved: null,
-  // When enabled, a return at the top level is not considered an
-  // error.
-  allowReturnOutsideFunction: false,
-  // When enabled, import/export statements are not constrained to
-  // appearing at the top of the program.
-  allowImportExportEverywhere: false,
-  // When enabled, await identifiers are allowed to appear at the top-level scope,
-  // but they are still not allowed in non-async functions.
-  allowAwaitOutsideFunction: false,
-  // When enabled, hashbang directive in the beginning of file
-  // is allowed and treated as a line comment.
-  allowHashBang: false,
-  // When `locations` is on, `loc` properties holding objects with
-  // `start` and `end` properties in `{line, column}` form (with
-  // line being 1-based and column 0-based) will be attached to the
-  // nodes.
-  locations: false,
-  // A function can be passed as `onToken` option, which will
-  // cause Acorn to call that function with object in the same
-  // format as tokens returned from `tokenizer().getToken()`. Note
-  // that you are not allowed to call the parser from the
-  // callback—that will corrupt its internal state.
-  onToken: null,
-  // A function can be passed as `onComment` option, which will
-  // cause Acorn to call that function with `(block, text, start,
-  // end)` parameters whenever a comment is skipped. `block` is a
-  // boolean indicating whether this is a block (`/* */`) comment,
-  // `text` is the content of the comment, and `start` and `end` are
-  // character offsets that denote the start and end of the comment.
-  // When the `locations` option is on, two more parameters are
-  // passed, the full `{line, column}` locations of the start and
-  // end of the comments. Note that you are not allowed to call the
-  // parser from the callback—that will corrupt its internal state.
-  onComment: null,
-  // Nodes have their start and end characters offsets recorded in
-  // `start` and `end` properties (directly on the node, rather than
-  // the `loc` object, which holds line/column data. To also add a
-  // [semi-standardized][range] `range` property holding a `[start,
-  // end]` array with the same numbers, set the `ranges` option to
-  // `true`.
-  //
-  // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
-  ranges: false,
-  // It is possible to parse multiple files into a single AST by
-  // passing the tree produced by parsing the first file as
-  // `program` option in subsequent parses. This will add the
-  // toplevel forms of the parsed file to the `Program` (top) node
-  // of an existing parse tree.
-  program: null,
-  // When `locations` is on, you can pass this to record the source
-  // file in every node's `loc` object.
-  sourceFile: null,
-  // This value, if given, is stored in every node, whether
-  // `locations` is on or off.
-  directSourceFile: null,
-  // When enabled, parenthesized expressions are represented by
-  // (non-standard) ParenthesizedExpression nodes
-  preserveParens: false
-};
-
-// Interpret and default an options object
+  // A second optional argument can be given to further configure
+  // the parser process. These options are recognized:
+
+  var defaultOptions = {
+    // `ecmaVersion` indicates the ECMAScript version to parse. Must be
+    // either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018), or 10
+    // (2019). This influences support for strict mode, the set of
+    // reserved words, and support for new syntax features. The default
+    // is 10.
+    ecmaVersion: 10,
+    // `sourceType` indicates the mode the code should be parsed in.
+    // Can be either `"script"` or `"module"`. This influences global
+    // strict mode and parsing of `import` and `export` declarations.
+    sourceType: "script",
+    // `onInsertedSemicolon` can be a callback that will be called
+    // when a semicolon is automatically inserted. It will be passed
+    // the position of the comma as an offset, and if `locations` is
+    // enabled, it is given the location as a `{line, column}` object
+    // as second argument.
+    onInsertedSemicolon: null,
+    // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
+    // trailing commas.
+    onTrailingComma: null,
+    // By default, reserved words are only enforced if ecmaVersion >= 5.
+    // Set `allowReserved` to a boolean value to explicitly turn this on
+    // an off. When this option has the value "never", reserved words
+    // and keywords can also not be used as property names.
+    allowReserved: null,
+    // When enabled, a return at the top level is not considered an
+    // error.
+    allowReturnOutsideFunction: false,
+    // When enabled, import/export statements are not constrained to
+    // appearing at the top of the program.
+    allowImportExportEverywhere: false,
+    // When enabled, await identifiers are allowed to appear at the top-level scope,
+    // but they are still not allowed in non-async functions.
+    allowAwaitOutsideFunction: false,
+    // When enabled, hashbang directive in the beginning of file
+    // is allowed and treated as a line comment.
+    allowHashBang: false,
+    // When `locations` is on, `loc` properties holding objects with
+    // `start` and `end` properties in `{line, column}` form (with
+    // line being 1-based and column 0-based) will be attached to the
+    // nodes.
+    locations: false,
+    // A function can be passed as `onToken` option, which will
+    // cause Acorn to call that function with object in the same
+    // format as tokens returned from `tokenizer().getToken()`. Note
+    // that you are not allowed to call the parser from the
+    // callback—that will corrupt its internal state.
+    onToken: null,
+    // A function can be passed as `onComment` option, which will
+    // cause Acorn to call that function with `(block, text, start,
+    // end)` parameters whenever a comment is skipped. `block` is a
+    // boolean indicating whether this is a block (`/* */`) comment,
+    // `text` is the content of the comment, and `start` and `end` are
+    // character offsets that denote the start and end of the comment.
+    // When the `locations` option is on, two more parameters are
+    // passed, the full `{line, column}` locations of the start and
+    // end of the comments. Note that you are not allowed to call the
+    // parser from the callback—that will corrupt its internal state.
+    onComment: null,
+    // Nodes have their start and end characters offsets recorded in
+    // `start` and `end` properties (directly on the node, rather than
+    // the `loc` object, which holds line/column data. To also add a
+    // [semi-standardized][range] `range` property holding a `[start,
+    // end]` array with the same numbers, set the `ranges` option to
+    // `true`.
+    //
+    // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
+    ranges: false,
+    // It is possible to parse multiple files into a single AST by
+    // passing the tree produced by parsing the first file as
+    // `program` option in subsequent parses. This will add the
+    // toplevel forms of the parsed file to the `Program` (top) node
+    // of an existing parse tree.
+    program: null,
+    // When `locations` is on, you can pass this to record the source
+    // file in every node's `loc` object.
+    sourceFile: null,
+    // This value, if given, is stored in every node, whether
+    // `locations` is on or off.
+    directSourceFile: null,
+    // When enabled, parenthesized expressions are represented by
+    // (non-standard) ParenthesizedExpression nodes
+    preserveParens: false
+  };
 
-function getOptions(opts) {
-  var options = {};
+  // Interpret and default an options object
+
+  function getOptions(opts) {
+    var options = {};
+
+    for (var opt in defaultOptions)
+      { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; }
+
+    if (options.ecmaVersion >= 2015)
+      { options.ecmaVersion -= 2009; }
+
+    if (options.allowReserved == null)
+      { options.allowReserved = options.ecmaVersion < 5; }
+
+    if (isArray(options.onToken)) {
+      var tokens = options.onToken;
+      options.onToken = function (token) { return tokens.push(token); };
+    }
+    if (isArray(options.onComment))
+      { options.onComment = pushComment(options, options.onComment); }
+
+    return options
+  }
+
+  function pushComment(options, array) {
+    return function(block, text, start, end, startLoc, endLoc) {
+      var comment = {
+        type: block ? "Block" : "Line",
+        value: text,
+        start: start,
+        end: end
+      };
+      if (options.locations)
+        { comment.loc = new SourceLocation(this, startLoc, endLoc); }
+      if (options.ranges)
+        { comment.range = [start, end]; }
+      array.push(comment);
+    }
+  }
+
+  // Each scope gets a bitset that may contain these flags
+  var
+      SCOPE_TOP = 1,
+      SCOPE_FUNCTION = 2,
+      SCOPE_VAR = SCOPE_TOP | SCOPE_FUNCTION,
+      SCOPE_ASYNC = 4,
+      SCOPE_GENERATOR = 8,
+      SCOPE_ARROW = 16,
+      SCOPE_SIMPLE_CATCH = 32,
+      SCOPE_SUPER = 64,
+      SCOPE_DIRECT_SUPER = 128;
+
+  function functionFlags(async, generator) {
+    return SCOPE_FUNCTION | (async ? SCOPE_ASYNC : 0) | (generator ? SCOPE_GENERATOR : 0)
+  }
+
+  // Used in checkLVal and declareName to determine the type of a binding
+  var
+      BIND_NONE = 0, // Not a binding
+      BIND_VAR = 1, // Var-style binding
+      BIND_LEXICAL = 2, // Let- or const-style binding
+      BIND_FUNCTION = 3, // Function declaration
+      BIND_SIMPLE_CATCH = 4, // Simple (identifier pattern) catch binding
+      BIND_OUTSIDE = 5; // Special case for function names as bound inside the function
+
+  var Parser = function Parser(options, input, startPos) {
+    this.options = options = getOptions(options);
+    this.sourceFile = options.sourceFile;
+    this.keywords = wordsRegexp(keywords[options.ecmaVersion >= 6 ? 6 : options.sourceType === "module" ? "5module" : 5]);
+    var reserved = "";
+    if (options.allowReserved !== true) {
+      for (var v = options.ecmaVersion;; v--)
+        { if (reserved = reservedWords[v]) { break } }
+      if (options.sourceType === "module") { reserved += " await"; }
+    }
+    this.reservedWords = wordsRegexp(reserved);
+    var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
+    this.reservedWordsStrict = wordsRegexp(reservedStrict);
+    this.reservedWordsStrictBind = wordsRegexp(reservedStrict + " " + reservedWords.strictBind);
+    this.input = String(input);
+
+    // Used to signal to callers of `readWord1` whether the word
+    // contained any escape sequences. This is needed because words with
+    // escape sequences must not be interpreted as keywords.
+    this.containsEsc = false;
+
+    // Set up token state
+
+    // The current position of the tokenizer in the input.
+    if (startPos) {
+      this.pos = startPos;
+      this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
+      this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
+    } else {
+      this.pos = this.lineStart = 0;
+      this.curLine = 1;
+    }
+
+    // Properties of the current token:
+    // Its type
+    this.type = types.eof;
+    // For tokens that include more information than their type, the value
+    this.value = null;
+    // Its start and end offset
+    this.start = this.end = this.pos;
+    // And, if locations are used, the {line, column} object
+    // corresponding to those offsets
+    this.startLoc = this.endLoc = this.curPosition();
+
+    // Position information for the previous token
+    this.lastTokEndLoc = this.lastTokStartLoc = null;
+    this.lastTokStart = this.lastTokEnd = this.pos;
+
+    // The context stack is used to superficially track syntactic
+    // context to predict whether a regular expression is allowed in a
+    // given position.
+    this.context = this.initialContext();
+    this.exprAllowed = true;
 
-  for (var opt in defaultOptions)
-    { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; }
+    // Figure out if it's a module code.
+    this.inModule = options.sourceType === "module";
+    this.strict = this.inModule || this.strictDirective(this.pos);
 
-  if (options.ecmaVersion >= 2015)
-    { options.ecmaVersion -= 2009; }
+    // Used to signify the start of a potential arrow function
+    this.potentialArrowAt = -1;
 
-  if (options.allowReserved == null)
-    { options.allowReserved = options.ecmaVersion < 5; }
+    // Positions to delayed-check that yield/await does not exist in default parameters.
+    this.yieldPos = this.awaitPos = this.awaitIdentPos = 0;
+    // Labels in scope.
+    this.labels = [];
+    // Thus-far undefined exports.
+    this.undefinedExports = {};
 
-  if (isArray(options.onToken)) {
-    var tokens = options.onToken;
-    options.onToken = function (token) { return tokens.push(token); };
-  }
-  if (isArray(options.onComment))
-    { options.onComment = pushComment(options, options.onComment); }
+    // If enabled, skip leading hashbang line.
+    if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
+      { this.skipLineComment(2); }
 
-  return options
-}
+    // Scope tracking for duplicate variable names (see scope.js)
+    this.scopeStack = [];
+    this.enterScope(SCOPE_TOP);
 
-function pushComment(options, array) {
-  return function(block, text, start, end, startLoc, endLoc) {
-    var comment = {
-      type: block ? "Block" : "Line",
-      value: text,
-      start: start,
-      end: end
-    };
-    if (options.locations)
-      { comment.loc = new SourceLocation(this, startLoc, endLoc); }
-    if (options.ranges)
-      { comment.range = [start, end]; }
-    array.push(comment);
-  }
-}
+    // For RegExp validation
+    this.regexpState = null;
+  };
 
-// Each scope gets a bitset that may contain these flags
-var SCOPE_TOP = 1;
-var SCOPE_FUNCTION = 2;
-var SCOPE_VAR = SCOPE_TOP | SCOPE_FUNCTION;
-var SCOPE_ASYNC = 4;
-var SCOPE_GENERATOR = 8;
-var SCOPE_ARROW = 16;
-var SCOPE_SIMPLE_CATCH = 32;
-var SCOPE_SUPER = 64;
-var SCOPE_DIRECT_SUPER = 128;
-
-function functionFlags(async, generator) {
-  return SCOPE_FUNCTION | (async ? SCOPE_ASYNC : 0) | (generator ? SCOPE_GENERATOR : 0)
-}
+  var prototypeAccessors = { inFunction: { configurable: true },inGenerator: { configurable: true },inAsync: { configurable: true },allowSuper: { configurable: true },allowDirectSuper: { configurable: true },treatFunctionsAsVar: { configurable: true } };
 
-// Used in checkLVal and declareName to determine the type of a binding
-var BIND_NONE = 0;
-var BIND_VAR = 1;
-var BIND_LEXICAL = 2;
-var BIND_FUNCTION = 3;
-var BIND_SIMPLE_CATCH = 4;
-var BIND_OUTSIDE = 5; // Special case for function names as bound inside the function
-
-var Parser = function Parser(options, input, startPos) {
-  this.options = options = getOptions(options);
-  this.sourceFile = options.sourceFile;
-  this.keywords = wordsRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
-  var reserved = "";
-  if (!options.allowReserved) {
-    for (var v = options.ecmaVersion;; v--)
-      { if (reserved = reservedWords[v]) { break } }
-    if (options.sourceType === "module") { reserved += " await"; }
-  }
-  this.reservedWords = wordsRegexp(reserved);
-  var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
-  this.reservedWordsStrict = wordsRegexp(reservedStrict);
-  this.reservedWordsStrictBind = wordsRegexp(reservedStrict + " " + reservedWords.strictBind);
-  this.input = String(input);
-
-  // Used to signal to callers of `readWord1` whether the word
-  // contained any escape sequences. This is needed because words with
-  // escape sequences must not be interpreted as keywords.
-  this.containsEsc = false;
-
-  // Set up token state
-
-  // The current position of the tokenizer in the input.
-  if (startPos) {
-    this.pos = startPos;
-    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
-    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
-  } else {
-    this.pos = this.lineStart = 0;
-    this.curLine = 1;
-  }
+  Parser.prototype.parse = function parse () {
+    var node = this.options.program || this.startNode();
+    this.nextToken();
+    return this.parseTopLevel(node)
+  };
 
-  // Properties of the current token:
-  // Its type
-  this.type = types.eof;
-  // For tokens that include more information than their type, the value
-  this.value = null;
-  // Its start and end offset
-  this.start = this.end = this.pos;
-  // And, if locations are used, the {line, column} object
-  // corresponding to those offsets
-  this.startLoc = this.endLoc = this.curPosition();
-
-  // Position information for the previous token
-  this.lastTokEndLoc = this.lastTokStartLoc = null;
-  this.lastTokStart = this.lastTokEnd = this.pos;
-
-  // The context stack is used to superficially track syntactic
-  // context to predict whether a regular expression is allowed in a
-  // given position.
-  this.context = this.initialContext();
-  this.exprAllowed = true;
-
-  // Figure out if it's a module code.
-  this.inModule = options.sourceType === "module";
-  this.strict = this.inModule || this.strictDirective(this.pos);
-
-  // Used to signify the start of a potential arrow function
-  this.potentialArrowAt = -1;
-
-  // Positions to delayed-check that yield/await does not exist in default parameters.
-  this.yieldPos = this.awaitPos = this.awaitIdentPos = 0;
-  // Labels in scope.
-  this.labels = [];
-  // Thus-far undefined exports.
-  this.undefinedExports = {};
-
-  // If enabled, skip leading hashbang line.
-  if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
-    { this.skipLineComment(2); }
-
-  // Scope tracking for duplicate variable names (see scope.js)
-  this.scopeStack = [];
-  this.enterScope(SCOPE_TOP);
-
-  // For RegExp validation
-  this.regexpState = null;
-};
+  prototypeAccessors.inFunction.get = function () { return (this.currentVarScope().flags & SCOPE_FUNCTION) > 0 };
+  prototypeAccessors.inGenerator.get = function () { return (this.currentVarScope().flags & SCOPE_GENERATOR) > 0 };
+  prototypeAccessors.inAsync.get = function () { return (this.currentVarScope().flags & SCOPE_ASYNC) > 0 };
+  prototypeAccessors.allowSuper.get = function () { return (this.currentThisScope().flags & SCOPE_SUPER) > 0 };
+  prototypeAccessors.allowDirectSuper.get = function () { return (this.currentThisScope().flags & SCOPE_DIRECT_SUPER) > 0 };
+  prototypeAccessors.treatFunctionsAsVar.get = function () { return this.treatFunctionsAsVarInScope(this.currentScope()) };
 
-var prototypeAccessors = { inFunction: { configurable: true },inGenerator: { configurable: true },inAsync: { configurable: true },allowSuper: { configurable: true },allowDirectSuper: { configurable: true },treatFunctionsAsVar: { configurable: true } };
+  // Switch to a getter for 7.0.0.
+  Parser.prototype.inNonArrowFunction = function inNonArrowFunction () { return (this.currentThisScope().flags & SCOPE_FUNCTION) > 0 };
 
-Parser.prototype.parse = function parse () {
-  var node = this.options.program || this.startNode();
-  this.nextToken();
-  return this.parseTopLevel(node)
-};
+  Parser.extend = function extend () {
+      var plugins = [], len = arguments.length;
+      while ( len-- ) plugins[ len ] = arguments[ len ];
 
-prototypeAccessors.inFunction.get = function () { return (this.currentVarScope().flags & SCOPE_FUNCTION) > 0 };
-prototypeAccessors.inGenerator.get = function () { return (this.currentVarScope().flags & SCOPE_GENERATOR) > 0 };
-prototypeAccessors.inAsync.get = function () { return (this.currentVarScope().flags & SCOPE_ASYNC) > 0 };
-prototypeAccessors.allowSuper.get = function () { return (this.currentThisScope().flags & SCOPE_SUPER) > 0 };
-prototypeAccessors.allowDirectSuper.get = function () { return (this.currentThisScope().flags & SCOPE_DIRECT_SUPER) > 0 };
-prototypeAccessors.treatFunctionsAsVar.get = function () { return this.treatFunctionsAsVarInScope(this.currentScope()) };
+    var cls = this;
+    for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
+    return cls
+  };
 
-// Switch to a getter for 7.0.0.
-Parser.prototype.inNonArrowFunction = function inNonArrowFunction () { return (this.currentThisScope().flags & SCOPE_FUNCTION) > 0 };
+  Parser.parse = function parse (input, options) {
+    return new this(options, input).parse()
+  };
 
-Parser.extend = function extend () {
-    var plugins = [], len = arguments.length;
-    while ( len-- ) plugins[ len ] = arguments[ len ];
+  Parser.parseExpressionAt = function parseExpressionAt (input, pos, options) {
+    var parser = new this(options, input, pos);
+    parser.nextToken();
+    return parser.parseExpression()
+  };
 
-  var cls = this;
-  for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
-  return cls
-};
+  Parser.tokenizer = function tokenizer (input, options) {
+    return new this(options, input)
+  };
 
-Parser.parse = function parse (input, options) {
-  return new this(options, input).parse()
-};
+  Object.defineProperties( Parser.prototype, prototypeAccessors );
 
-Parser.parseExpressionAt = function parseExpressionAt (input, pos, options) {
-  var parser = new this(options, input, pos);
-  parser.nextToken();
-  return parser.parseExpression()
-};
+  var pp = Parser.prototype;
 
-Parser.tokenizer = function tokenizer (input, options) {
-  return new this(options, input)
-};
+  // ## Parser utilities
 
-Object.defineProperties( Parser.prototype, prototypeAccessors );
+  var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)")/;
+  pp.strictDirective = function(start) {
+    for (;;) {
+      // Try to find string literal.
+      skipWhiteSpace.lastIndex = start;
+      start += skipWhiteSpace.exec(this.input)[0].length;
+      var match = literal.exec(this.input.slice(start));
+      if (!match) { return false }
+      if ((match[1] || match[2]) === "use strict") { return true }
+      start += match[0].length;
 
-var pp = Parser.prototype;
+      // Skip semicolon, if any.
+      skipWhiteSpace.lastIndex = start;
+      start += skipWhiteSpace.exec(this.input)[0].length;
+      if (this.input[start] === ";")
+        { start++; }
+    }
+  };
 
-// ## Parser utilities
+  // Predicate that tests whether the next token is of the given
+  // type, and if yes, consumes it as a side effect.
 
-var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)")/;
-pp.strictDirective = function(start) {
-  var this$1 = this;
+  pp.eat = function(type) {
+    if (this.type === type) {
+      this.next();
+      return true
+    } else {
+      return false
+    }
+  };
 
-  for (;;) {
-    // Try to find string literal.
-    skipWhiteSpace.lastIndex = start;
-    start += skipWhiteSpace.exec(this$1.input)[0].length;
-    var match = literal.exec(this$1.input.slice(start));
-    if (!match) { return false }
-    if ((match[1] || match[2]) === "use strict") { return true }
-    start += match[0].length;
+  // Tests whether parsed token is a contextual keyword.
 
-    // Skip semicolon, if any.
-    skipWhiteSpace.lastIndex = start;
-    start += skipWhiteSpace.exec(this$1.input)[0].length;
-    if (this$1.input[start] === ";")
-      { start++; }
-  }
-};
+  pp.isContextual = function(name) {
+    return this.type === types.name && this.value === name && !this.containsEsc
+  };
 
-// Predicate that tests whether the next token is of the given
-// type, and if yes, consumes it as a side effect.
+  // Consumes contextual keyword if possible.
 
-pp.eat = function(type) {
-  if (this.type === type) {
+  pp.eatContextual = function(name) {
+    if (!this.isContextual(name)) { return false }
     this.next();
     return true
-  } else {
-    return false
-  }
-};
-
-// Tests whether parsed token is a contextual keyword.
-
-pp.isContextual = function(name) {
-  return this.type === types.name && this.value === name && !this.containsEsc
-};
-
-// Consumes contextual keyword if possible.
-
-pp.eatContextual = function(name) {
-  if (!this.isContextual(name)) { return false }
-  this.next();
-  return true
-};
-
-// Asserts that following token is given contextual keyword.
+  };
 
-pp.expectContextual = function(name) {
-  if (!this.eatContextual(name)) { this.unexpected(); }
-};
+  // Asserts that following token is given contextual keyword.
 
-// Test whether a semicolon can be inserted at the current position.
+  pp.expectContextual = function(name) {
+    if (!this.eatContextual(name)) { this.unexpected(); }
+  };
 
-pp.canInsertSemicolon = function() {
-  return this.type === types.eof ||
-    this.type === types.braceR ||
-    lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-};
+  // Test whether a semicolon can be inserted at the current position.
 
-pp.insertSemicolon = function() {
-  if (this.canInsertSemicolon()) {
-    if (this.options.onInsertedSemicolon)
-      { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
-    return true
-  }
-};
-
-// Consume a semicolon, or, failing that, see if we are allowed to
-// pretend that there is a semicolon at this position.
+  pp.canInsertSemicolon = function() {
+    return this.type === types.eof ||
+      this.type === types.braceR ||
+      lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+  };
 
-pp.semicolon = function() {
-  if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); }
-};
+  pp.insertSemicolon = function() {
+    if (this.canInsertSemicolon()) {
+      if (this.options.onInsertedSemicolon)
+        { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
+      return true
+    }
+  };
 
-pp.afterTrailingComma = function(tokType, notNext) {
-  if (this.type === tokType) {
-    if (this.options.onTrailingComma)
-      { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
-    if (!notNext)
-      { this.next(); }
-    return true
-  }
-};
+  // Consume a semicolon, or, failing that, see if we are allowed to
+  // pretend that there is a semicolon at this position.
 
-// Expect a token of a given type. If found, consume it, otherwise,
-// raise an unexpected token error.
+  pp.semicolon = function() {
+    if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); }
+  };
 
-pp.expect = function(type) {
-  this.eat(type) || this.unexpected();
-};
+  pp.afterTrailingComma = function(tokType, notNext) {
+    if (this.type === tokType) {
+      if (this.options.onTrailingComma)
+        { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
+      if (!notNext)
+        { this.next(); }
+      return true
+    }
+  };
 
-// Raise an unexpected token error.
+  // Expect a token of a given type. If found, consume it, otherwise,
+  // raise an unexpected token error.
 
-pp.unexpected = function(pos) {
-  this.raise(pos != null ? pos : this.start, "Unexpected token");
-};
+  pp.expect = function(type) {
+    this.eat(type) || this.unexpected();
+  };
 
-function DestructuringErrors() {
-  this.shorthandAssign =
-  this.trailingComma =
-  this.parenthesizedAssign =
-  this.parenthesizedBind =
-  this.doubleProto =
-    -1;
-}
+  // Raise an unexpected token error.
 
-pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
-  if (!refDestructuringErrors) { return }
-  if (refDestructuringErrors.trailingComma > -1)
-    { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
-  var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
-  if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); }
-};
+  pp.unexpected = function(pos) {
+    this.raise(pos != null ? pos : this.start, "Unexpected token");
+  };
 
-pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
-  if (!refDestructuringErrors) { return false }
-  var shorthandAssign = refDestructuringErrors.shorthandAssign;
-  var doubleProto = refDestructuringErrors.doubleProto;
-  if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 }
-  if (shorthandAssign >= 0)
-    { this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); }
-  if (doubleProto >= 0)
-    { this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); }
-};
+  function DestructuringErrors() {
+    this.shorthandAssign =
+    this.trailingComma =
+    this.parenthesizedAssign =
+    this.parenthesizedBind =
+    this.doubleProto =
+      -1;
+  }
+
+  pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
+    if (!refDestructuringErrors) { return }
+    if (refDestructuringErrors.trailingComma > -1)
+      { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
+    var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
+    if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); }
+  };
 
-pp.checkYieldAwaitInDefaultParams = function() {
-  if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
-    { this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
-  if (this.awaitPos)
-    { this.raise(this.awaitPos, "Await expression cannot be a default value"); }
-};
+  pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
+    if (!refDestructuringErrors) { return false }
+    var shorthandAssign = refDestructuringErrors.shorthandAssign;
+    var doubleProto = refDestructuringErrors.doubleProto;
+    if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 }
+    if (shorthandAssign >= 0)
+      { this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); }
+    if (doubleProto >= 0)
+      { this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); }
+  };
 
-pp.isSimpleAssignTarget = function(expr) {
-  if (expr.type === "ParenthesizedExpression")
-    { return this.isSimpleAssignTarget(expr.expression) }
-  return expr.type === "Identifier" || expr.type === "MemberExpression"
-};
+  pp.checkYieldAwaitInDefaultParams = function() {
+    if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
+      { this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
+    if (this.awaitPos)
+      { this.raise(this.awaitPos, "Await expression cannot be a default value"); }
+  };
 
-var pp$1 = Parser.prototype;
+  pp.isSimpleAssignTarget = function(expr) {
+    if (expr.type === "ParenthesizedExpression")
+      { return this.isSimpleAssignTarget(expr.expression) }
+    return expr.type === "Identifier" || expr.type === "MemberExpression"
+  };
 
-// ### Statement parsing
+  var pp$1 = Parser.prototype;
 
-// Parse a program. Initializes the parser, reads any number of
-// statements, and wraps them in a Program node.  Optionally takes a
-// `program` argument.  If present, the statements will be appended
-// to its body instead of creating a new node.
+  // ### Statement parsing
 
-pp$1.parseTopLevel = function(node) {
-  var this$1 = this;
+  // Parse a program. Initializes the parser, reads any number of
+  // statements, and wraps them in a Program node.  Optionally takes a
+  // `program` argument.  If present, the statements will be appended
+  // to its body instead of creating a new node.
 
-  var exports = {};
-  if (!node.body) { node.body = []; }
-  while (this.type !== types.eof) {
-    var stmt = this$1.parseStatement(null, true, exports);
-    node.body.push(stmt);
-  }
-  if (this.inModule)
-    { for (var i = 0, list = Object.keys(this$1.undefinedExports); i < list.length; i += 1)
-      {
-        var name = list[i];
+  pp$1.parseTopLevel = function(node) {
+    var exports = {};
+    if (!node.body) { node.body = []; }
+    while (this.type !== types.eof) {
+      var stmt = this.parseStatement(null, true, exports);
+      node.body.push(stmt);
+    }
+    if (this.inModule)
+      { for (var i = 0, list = Object.keys(this.undefinedExports); i < list.length; i += 1)
+        {
+          var name = list[i];
 
-        this$1.raiseRecoverable(this$1.undefinedExports[name].start, ("Export '" + name + "' is not defined"));
-      } }
-  this.adaptDirectivePrologue(node.body);
-  this.next();
-  if (this.options.ecmaVersion >= 6) {
+          this.raiseRecoverable(this.undefinedExports[name].start, ("Export '" + name + "' is not defined"));
+        } }
+    this.adaptDirectivePrologue(node.body);
+    this.next();
     node.sourceType = this.options.sourceType;
-  }
-  return this.finishNode(node, "Program")
-};
+    return this.finishNode(node, "Program")
+  };
 
-var loopLabel = {kind: "loop"};
-var switchLabel = {kind: "switch"};
-
-pp$1.isLet = function(context) {
-  if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false }
-  skipWhiteSpace.lastIndex = this.pos;
-  var skip = skipWhiteSpace.exec(this.input);
-  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
-  // For ambiguous cases, determine if a LexicalDeclaration (or only a
-  // Statement) is allowed here. If context is not empty then only a Statement
-  // is allowed. However, `let [` is an explicit negative lookahead for
-  // ExpressionStatement, so special-case it first.
-  if (nextCh === 91) { return true } // '['
-  if (context) { return false }
-
-  if (nextCh === 123) { return true } // '{'
-  if (isIdentifierStart(nextCh, true)) {
-    var pos = next + 1;
-    while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; }
-    var ident = this.input.slice(next, pos);
-    if (!keywordRelationalOperator.test(ident)) { return true }
-  }
-  return false
-};
+  var loopLabel = {kind: "loop"}, switchLabel = {kind: "switch"};
+
+  pp$1.isLet = function(context) {
+    if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false }
+    skipWhiteSpace.lastIndex = this.pos;
+    var skip = skipWhiteSpace.exec(this.input);
+    var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
+    // For ambiguous cases, determine if a LexicalDeclaration (or only a
+    // Statement) is allowed here. If context is not empty then only a Statement
+    // is allowed. However, `let [` is an explicit negative lookahead for
+    // ExpressionStatement, so special-case it first.
+    if (nextCh === 91) { return true } // '['
+    if (context) { return false }
+
+    if (nextCh === 123) { return true } // '{'
+    if (isIdentifierStart(nextCh, true)) {
+      var pos = next + 1;
+      while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; }
+      var ident = this.input.slice(next, pos);
+      if (!keywordRelationalOperator.test(ident)) { return true }
+    }
+    return false
+  };
 
-// check 'async [no LineTerminator here] function'
-// - 'async /*foo*/ function' is OK.
-// - 'async /*\n*/ function' is invalid.
-pp$1.isAsyncFunction = function() {
-  if (this.options.ecmaVersion < 8 || !this.isContextual("async"))
-    { return false }
-
-  skipWhiteSpace.lastIndex = this.pos;
-  var skip = skipWhiteSpace.exec(this.input);
-  var next = this.pos + skip[0].length;
-  return !lineBreak.test(this.input.slice(this.pos, next)) &&
-    this.input.slice(next, next + 8) === "function" &&
-    (next + 8 === this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
-};
+  // check 'async [no LineTerminator here] function'
+  // - 'async /*foo*/ function' is OK.
+  // - 'async /*\n*/ function' is invalid.
+  pp$1.isAsyncFunction = function() {
+    if (this.options.ecmaVersion < 8 || !this.isContextual("async"))
+      { return false }
+
+    skipWhiteSpace.lastIndex = this.pos;
+    var skip = skipWhiteSpace.exec(this.input);
+    var next = this.pos + skip[0].length;
+    return !lineBreak.test(this.input.slice(this.pos, next)) &&
+      this.input.slice(next, next + 8) === "function" &&
+      (next + 8 === this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
+  };
 
-// Parse a single statement.
-//
-// If expecting a statement and finding a slash operator, parse a
-// regular expression literal. This is to handle cases like
-// `if (foo) /blah/.exec(foo)`, where looking at the previous token
-// does not help.
+  // Parse a single statement.
+  //
+  // If expecting a statement and finding a slash operator, parse a
+  // regular expression literal. This is to handle cases like
+  // `if (foo) /blah/.exec(foo)`, where looking at the previous token
+  // does not help.
+
+  pp$1.parseStatement = function(context, topLevel, exports) {
+    var starttype = this.type, node = this.startNode(), kind;
+
+    if (this.isLet(context)) {
+      starttype = types._var;
+      kind = "let";
+    }
+
+    // Most types of statements are recognized by the keyword they
+    // start with. Many are trivial to parse, some require a bit of
+    // complexity.
+
+    switch (starttype) {
+    case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
+    case types._debugger: return this.parseDebuggerStatement(node)
+    case types._do: return this.parseDoStatement(node)
+    case types._for: return this.parseForStatement(node)
+    case types._function:
+      // Function as sole body of either an if statement or a labeled statement
+      // works, but not when it is part of a labeled statement that is the sole
+      // body of an if statement.
+      if ((context && (this.strict || context !== "if" && context !== "label")) && this.options.ecmaVersion >= 6) { this.unexpected(); }
+      return this.parseFunctionStatement(node, false, !context)
+    case types._class:
+      if (context) { this.unexpected(); }
+      return this.parseClass(node, true)
+    case types._if: return this.parseIfStatement(node)
+    case types._return: return this.parseReturnStatement(node)
+    case types._switch: return this.parseSwitchStatement(node)
+    case types._throw: return this.parseThrowStatement(node)
+    case types._try: return this.parseTryStatement(node)
+    case types._const: case types._var:
+      kind = kind || this.value;
+      if (context && kind !== "var") { this.unexpected(); }
+      return this.parseVarStatement(node, kind)
+    case types._while: return this.parseWhileStatement(node)
+    case types._with: return this.parseWithStatement(node)
+    case types.braceL: return this.parseBlock(true, node)
+    case types.semi: return this.parseEmptyStatement(node)
+    case types._export:
+    case types._import:
+      if (this.options.ecmaVersion > 10 && starttype === types._import) {
+        skipWhiteSpace.lastIndex = this.pos;
+        var skip = skipWhiteSpace.exec(this.input);
+        var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
+        if (nextCh === 40) // '('
+          { return this.parseExpressionStatement(node, this.parseExpression()) }
+      }
 
-pp$1.parseStatement = function(context, topLevel, exports) {
-  var starttype = this.type, node = this.startNode(), kind;
+      if (!this.options.allowImportExportEverywhere) {
+        if (!topLevel)
+          { this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
+        if (!this.inModule)
+          { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
+      }
+      return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
 
-  if (this.isLet(context)) {
-    starttype = types._var;
-    kind = "let";
-  }
+      // If the statement does not start with a statement keyword or a
+      // brace, it's an ExpressionStatement or LabeledStatement. We
+      // simply start parsing an expression, and afterwards, if the
+      // next token is a colon and the expression was a simple
+      // Identifier node, we switch to interpreting it as a label.
+    default:
+      if (this.isAsyncFunction()) {
+        if (context) { this.unexpected(); }
+        this.next();
+        return this.parseFunctionStatement(node, true, !context)
+      }
 
-  // Most types of statements are recognized by the keyword they
-  // start with. Many are trivial to parse, some require a bit of
-  // complexity.
-
-  switch (starttype) {
-  case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
-  case types._debugger: return this.parseDebuggerStatement(node)
-  case types._do: return this.parseDoStatement(node)
-  case types._for: return this.parseForStatement(node)
-  case types._function:
-    // Function as sole body of either an if statement or a labeled statement
-    // works, but not when it is part of a labeled statement that is the sole
-    // body of an if statement.
-    if ((context && (this.strict || context !== "if" && context !== "label")) && this.options.ecmaVersion >= 6) { this.unexpected(); }
-    return this.parseFunctionStatement(node, false, !context)
-  case types._class:
-    if (context) { this.unexpected(); }
-    return this.parseClass(node, true)
-  case types._if: return this.parseIfStatement(node)
-  case types._return: return this.parseReturnStatement(node)
-  case types._switch: return this.parseSwitchStatement(node)
-  case types._throw: return this.parseThrowStatement(node)
-  case types._try: return this.parseTryStatement(node)
-  case types._const: case types._var:
-    kind = kind || this.value;
-    if (context && kind !== "var") { this.unexpected(); }
-    return this.parseVarStatement(node, kind)
-  case types._while: return this.parseWhileStatement(node)
-  case types._with: return this.parseWithStatement(node)
-  case types.braceL: return this.parseBlock(true, node)
-  case types.semi: return this.parseEmptyStatement(node)
-  case types._export:
-  case types._import:
-    if (!this.options.allowImportExportEverywhere) {
-      if (!topLevel)
-        { this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
-      if (!this.inModule)
-        { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
-    }
-    return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
-
-    // If the statement does not start with a statement keyword or a
-    // brace, it's an ExpressionStatement or LabeledStatement. We
-    // simply start parsing an expression, and afterwards, if the
-    // next token is a colon and the expression was a simple
-    // Identifier node, we switch to interpreting it as a label.
-  default:
-    if (this.isAsyncFunction()) {
-      if (context) { this.unexpected(); }
-      this.next();
-      return this.parseFunctionStatement(node, true, !context)
+      var maybeName = this.value, expr = this.parseExpression();
+      if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
+        { return this.parseLabeledStatement(node, maybeName, expr, context) }
+      else { return this.parseExpressionStatement(node, expr) }
     }
+  };
 
-    var maybeName = this.value, expr = this.parseExpression();
-    if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
-      { return this.parseLabeledStatement(node, maybeName, expr, context) }
-    else { return this.parseExpressionStatement(node, expr) }
-  }
-};
+  pp$1.parseBreakContinueStatement = function(node, keyword) {
+    var isBreak = keyword === "break";
+    this.next();
+    if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; }
+    else if (this.type !== types.name) { this.unexpected(); }
+    else {
+      node.label = this.parseIdent();
+      this.semicolon();
+    }
 
-pp$1.parseBreakContinueStatement = function(node, keyword) {
-  var this$1 = this;
+    // Verify that there is an actual destination to break or
+    // continue to.
+    var i = 0;
+    for (; i < this.labels.length; ++i) {
+      var lab = this.labels[i];
+      if (node.label == null || lab.name === node.label.name) {
+        if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
+        if (node.label && isBreak) { break }
+      }
+    }
+    if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
+    return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
+  };
 
-  var isBreak = keyword === "break";
-  this.next();
-  if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; }
-  else if (this.type !== types.name) { this.unexpected(); }
-  else {
-    node.label = this.parseIdent();
+  pp$1.parseDebuggerStatement = function(node) {
+    this.next();
     this.semicolon();
-  }
-
-  // Verify that there is an actual destination to break or
-  // continue to.
-  var i = 0;
-  for (; i < this.labels.length; ++i) {
-    var lab = this$1.labels[i];
-    if (node.label == null || lab.name === node.label.name) {
-      if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
-      if (node.label && isBreak) { break }
-    }
-  }
-  if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
-  return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-};
+    return this.finishNode(node, "DebuggerStatement")
+  };
 
-pp$1.parseDebuggerStatement = function(node) {
-  this.next();
-  this.semicolon();
-  return this.finishNode(node, "DebuggerStatement")
-};
+  pp$1.parseDoStatement = function(node) {
+    this.next();
+    this.labels.push(loopLabel);
+    node.body = this.parseStatement("do");
+    this.labels.pop();
+    this.expect(types._while);
+    node.test = this.parseParenExpression();
+    if (this.options.ecmaVersion >= 6)
+      { this.eat(types.semi); }
+    else
+      { this.semicolon(); }
+    return this.finishNode(node, "DoWhileStatement")
+  };
 
-pp$1.parseDoStatement = function(node) {
-  this.next();
-  this.labels.push(loopLabel);
-  node.body = this.parseStatement("do");
-  this.labels.pop();
-  this.expect(types._while);
-  node.test = this.parseParenExpression();
-  if (this.options.ecmaVersion >= 6)
-    { this.eat(types.semi); }
-  else
-    { this.semicolon(); }
-  return this.finishNode(node, "DoWhileStatement")
-};
+  // Disambiguating between a `for` and a `for`/`in` or `for`/`of`
+  // loop is non-trivial. Basically, we have to parse the init `var`
+  // statement or expression, disallowing the `in` operator (see
+  // the second parameter to `parseExpression`), and then check
+  // whether the next token is `in` or `of`. When there is no init
+  // part (semicolon immediately after the opening parenthesis), it
+  // is a regular `for` loop.
 
-// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
-// loop is non-trivial. Basically, we have to parse the init `var`
-// statement or expression, disallowing the `in` operator (see
-// the second parameter to `parseExpression`), and then check
-// whether the next token is `in` or `of`. When there is no init
-// part (semicolon immediately after the opening parenthesis), it
-// is a regular `for` loop.
-
-pp$1.parseForStatement = function(node) {
-  this.next();
-  var awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual("await")) ? this.lastTokStart : -1;
-  this.labels.push(loopLabel);
-  this.enterScope(0);
-  this.expect(types.parenL);
-  if (this.type === types.semi) {
-    if (awaitAt > -1) { this.unexpected(awaitAt); }
-    return this.parseFor(node, null)
-  }
-  var isLet = this.isLet();
-  if (this.type === types._var || this.type === types._const || isLet) {
-    var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
+  pp$1.parseForStatement = function(node) {
     this.next();
-    this.parseVar(init$1, true, kind);
-    this.finishNode(init$1, "VariableDeclaration");
-    if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
-        !(kind !== "var" && init$1.declarations[0].init)) {
+    var awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual("await")) ? this.lastTokStart : -1;
+    this.labels.push(loopLabel);
+    this.enterScope(0);
+    this.expect(types.parenL);
+    if (this.type === types.semi) {
+      if (awaitAt > -1) { this.unexpected(awaitAt); }
+      return this.parseFor(node, null)
+    }
+    var isLet = this.isLet();
+    if (this.type === types._var || this.type === types._const || isLet) {
+      var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
+      this.next();
+      this.parseVar(init$1, true, kind);
+      this.finishNode(init$1, "VariableDeclaration");
+      if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1) {
+        if (this.options.ecmaVersion >= 9) {
+          if (this.type === types._in) {
+            if (awaitAt > -1) { this.unexpected(awaitAt); }
+          } else { node.await = awaitAt > -1; }
+        }
+        return this.parseForIn(node, init$1)
+      }
+      if (awaitAt > -1) { this.unexpected(awaitAt); }
+      return this.parseFor(node, init$1)
+    }
+    var refDestructuringErrors = new DestructuringErrors;
+    var init = this.parseExpression(true, refDestructuringErrors);
+    if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
       if (this.options.ecmaVersion >= 9) {
         if (this.type === types._in) {
           if (awaitAt > -1) { this.unexpected(awaitAt); }
         } else { node.await = awaitAt > -1; }
       }
-      return this.parseForIn(node, init$1)
+      this.toAssignable(init, false, refDestructuringErrors);
+      this.checkLVal(init);
+      return this.parseForIn(node, init)
+    } else {
+      this.checkExpressionErrors(refDestructuringErrors, true);
     }
     if (awaitAt > -1) { this.unexpected(awaitAt); }
-    return this.parseFor(node, init$1)
-  }
-  var refDestructuringErrors = new DestructuringErrors;
-  var init = this.parseExpression(true, refDestructuringErrors);
-  if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
-    if (this.options.ecmaVersion >= 9) {
-      if (this.type === types._in) {
-        if (awaitAt > -1) { this.unexpected(awaitAt); }
-      } else { node.await = awaitAt > -1; }
-    }
-    this.toAssignable(init, false, refDestructuringErrors);
-    this.checkLVal(init);
-    return this.parseForIn(node, init)
-  } else {
-    this.checkExpressionErrors(refDestructuringErrors, true);
-  }
-  if (awaitAt > -1) { this.unexpected(awaitAt); }
-  return this.parseFor(node, init)
-};
+    return this.parseFor(node, init)
+  };
 
-pp$1.parseFunctionStatement = function(node, isAsync, declarationPosition) {
-  this.next();
-  return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), false, isAsync)
-};
+  pp$1.parseFunctionStatement = function(node, isAsync, declarationPosition) {
+    this.next();
+    return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), false, isAsync)
+  };
 
-pp$1.parseIfStatement = function(node) {
-  this.next();
-  node.test = this.parseParenExpression();
-  // allow function declarations in branches, but only in non-strict mode
-  node.consequent = this.parseStatement("if");
-  node.alternate = this.eat(types._else) ? this.parseStatement("if") : null;
-  return this.finishNode(node, "IfStatement")
-};
+  pp$1.parseIfStatement = function(node) {
+    this.next();
+    node.test = this.parseParenExpression();
+    // allow function declarations in branches, but only in non-strict mode
+    node.consequent = this.parseStatement("if");
+    node.alternate = this.eat(types._else) ? this.parseStatement("if") : null;
+    return this.finishNode(node, "IfStatement")
+  };
 
-pp$1.parseReturnStatement = function(node) {
-  if (!this.inFunction && !this.options.allowReturnOutsideFunction)
-    { this.raise(this.start, "'return' outside of function"); }
-  this.next();
+  pp$1.parseReturnStatement = function(node) {
+    if (!this.inFunction && !this.options.allowReturnOutsideFunction)
+      { this.raise(this.start, "'return' outside of function"); }
+    this.next();
 
-  // In `return` (and `break`/`continue`), the keywords with
-  // optional arguments, we eagerly look for a semicolon or the
-  // possibility to insert one.
+    // In `return` (and `break`/`continue`), the keywords with
+    // optional arguments, we eagerly look for a semicolon or the
+    // possibility to insert one.
 
-  if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; }
-  else { node.argument = this.parseExpression(); this.semicolon(); }
-  return this.finishNode(node, "ReturnStatement")
-};
+    if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; }
+    else { node.argument = this.parseExpression(); this.semicolon(); }
+    return this.finishNode(node, "ReturnStatement")
+  };
+
+  pp$1.parseSwitchStatement = function(node) {
+    this.next();
+    node.discriminant = this.parseParenExpression();
+    node.cases = [];
+    this.expect(types.braceL);
+    this.labels.push(switchLabel);
+    this.enterScope(0);
 
-pp$1.parseSwitchStatement = function(node) {
-  var this$1 = this;
-
-  this.next();
-  node.discriminant = this.parseParenExpression();
-  node.cases = [];
-  this.expect(types.braceL);
-  this.labels.push(switchLabel);
-  this.enterScope(0);
-
-  // Statements under must be grouped (by label) in SwitchCase
-  // nodes. `cur` is used to keep the node that we are currently
-  // adding statements to.
-
-  var cur;
-  for (var sawDefault = false; this.type !== types.braceR;) {
-    if (this$1.type === types._case || this$1.type === types._default) {
-      var isCase = this$1.type === types._case;
-      if (cur) { this$1.finishNode(cur, "SwitchCase"); }
-      node.cases.push(cur = this$1.startNode());
-      cur.consequent = [];
-      this$1.next();
-      if (isCase) {
-        cur.test = this$1.parseExpression();
+    // Statements under must be grouped (by label) in SwitchCase
+    // nodes. `cur` is used to keep the node that we are currently
+    // adding statements to.
+
+    var cur;
+    for (var sawDefault = false; this.type !== types.braceR;) {
+      if (this.type === types._case || this.type === types._default) {
+        var isCase = this.type === types._case;
+        if (cur) { this.finishNode(cur, "SwitchCase"); }
+        node.cases.push(cur = this.startNode());
+        cur.consequent = [];
+        this.next();
+        if (isCase) {
+          cur.test = this.parseExpression();
+        } else {
+          if (sawDefault) { this.raiseRecoverable(this.lastTokStart, "Multiple default clauses"); }
+          sawDefault = true;
+          cur.test = null;
+        }
+        this.expect(types.colon);
       } else {
-        if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); }
-        sawDefault = true;
-        cur.test = null;
+        if (!cur) { this.unexpected(); }
+        cur.consequent.push(this.parseStatement(null));
       }
-      this$1.expect(types.colon);
-    } else {
-      if (!cur) { this$1.unexpected(); }
-      cur.consequent.push(this$1.parseStatement(null));
     }
-  }
-  this.exitScope();
-  if (cur) { this.finishNode(cur, "SwitchCase"); }
-  this.next(); // Closing brace
-  this.labels.pop();
-  return this.finishNode(node, "SwitchStatement")
-};
+    this.exitScope();
+    if (cur) { this.finishNode(cur, "SwitchCase"); }
+    this.next(); // Closing brace
+    this.labels.pop();
+    return this.finishNode(node, "SwitchStatement")
+  };
 
-pp$1.parseThrowStatement = function(node) {
-  this.next();
-  if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
-    { this.raise(this.lastTokEnd, "Illegal newline after throw"); }
-  node.argument = this.parseExpression();
-  this.semicolon();
-  return this.finishNode(node, "ThrowStatement")
-};
+  pp$1.parseThrowStatement = function(node) {
+    this.next();
+    if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
+      { this.raise(this.lastTokEnd, "Illegal newline after throw"); }
+    node.argument = this.parseExpression();
+    this.semicolon();
+    return this.finishNode(node, "ThrowStatement")
+  };
 
-// Reused empty array added for node fields that are always empty.
+  // Reused empty array added for node fields that are always empty.
 
-var empty = [];
+  var empty = [];
 
-pp$1.parseTryStatement = function(node) {
-  this.next();
-  node.block = this.parseBlock();
-  node.handler = null;
-  if (this.type === types._catch) {
-    var clause = this.startNode();
+  pp$1.parseTryStatement = function(node) {
     this.next();
-    if (this.eat(types.parenL)) {
-      clause.param = this.parseBindingAtom();
-      var simple = clause.param.type === "Identifier";
-      this.enterScope(simple ? SCOPE_SIMPLE_CATCH : 0);
-      this.checkLVal(clause.param, simple ? BIND_SIMPLE_CATCH : BIND_LEXICAL);
-      this.expect(types.parenR);
-    } else {
-      if (this.options.ecmaVersion < 10) { this.unexpected(); }
-      clause.param = null;
-      this.enterScope(0);
+    node.block = this.parseBlock();
+    node.handler = null;
+    if (this.type === types._catch) {
+      var clause = this.startNode();
+      this.next();
+      if (this.eat(types.parenL)) {
+        clause.param = this.parseBindingAtom();
+        var simple = clause.param.type === "Identifier";
+        this.enterScope(simple ? SCOPE_SIMPLE_CATCH : 0);
+        this.checkLVal(clause.param, simple ? BIND_SIMPLE_CATCH : BIND_LEXICAL);
+        this.expect(types.parenR);
+      } else {
+        if (this.options.ecmaVersion < 10) { this.unexpected(); }
+        clause.param = null;
+        this.enterScope(0);
+      }
+      clause.body = this.parseBlock(false);
+      this.exitScope();
+      node.handler = this.finishNode(clause, "CatchClause");
     }
-    clause.body = this.parseBlock(false);
-    this.exitScope();
-    node.handler = this.finishNode(clause, "CatchClause");
-  }
-  node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
-  if (!node.handler && !node.finalizer)
-    { this.raise(node.start, "Missing catch or finally clause"); }
-  return this.finishNode(node, "TryStatement")
-};
+    node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
+    if (!node.handler && !node.finalizer)
+      { this.raise(node.start, "Missing catch or finally clause"); }
+    return this.finishNode(node, "TryStatement")
+  };
 
-pp$1.parseVarStatement = function(node, kind) {
-  this.next();
-  this.parseVar(node, false, kind);
-  this.semicolon();
-  return this.finishNode(node, "VariableDeclaration")
-};
+  pp$1.parseVarStatement = function(node, kind) {
+    this.next();
+    this.parseVar(node, false, kind);
+    this.semicolon();
+    return this.finishNode(node, "VariableDeclaration")
+  };
 
-pp$1.parseWhileStatement = function(node) {
-  this.next();
-  node.test = this.parseParenExpression();
-  this.labels.push(loopLabel);
-  node.body = this.parseStatement("while");
-  this.labels.pop();
-  return this.finishNode(node, "WhileStatement")
-};
+  pp$1.parseWhileStatement = function(node) {
+    this.next();
+    node.test = this.parseParenExpression();
+    this.labels.push(loopLabel);
+    node.body = this.parseStatement("while");
+    this.labels.pop();
+    return this.finishNode(node, "WhileStatement")
+  };
 
-pp$1.parseWithStatement = function(node) {
-  if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
-  this.next();
-  node.object = this.parseParenExpression();
-  node.body = this.parseStatement("with");
-  return this.finishNode(node, "WithStatement")
-};
+  pp$1.parseWithStatement = function(node) {
+    if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
+    this.next();
+    node.object = this.parseParenExpression();
+    node.body = this.parseStatement("with");
+    return this.finishNode(node, "WithStatement")
+  };
 
-pp$1.parseEmptyStatement = function(node) {
-  this.next();
-  return this.finishNode(node, "EmptyStatement")
-};
+  pp$1.parseEmptyStatement = function(node) {
+    this.next();
+    return this.finishNode(node, "EmptyStatement")
+  };
 
-pp$1.parseLabeledStatement = function(node, maybeName, expr, context) {
-  var this$1 = this;
-
-  for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1)
-    {
-    var label = list[i$1];
-
-    if (label.name === maybeName)
-      { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
-  } }
-  var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
-  for (var i = this.labels.length - 1; i >= 0; i--) {
-    var label$1 = this$1.labels[i];
-    if (label$1.statementStart === node.start) {
-      // Update information about previous labels on this node
-      label$1.statementStart = this$1.start;
-      label$1.kind = kind;
-    } else { break }
-  }
-  this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
-  node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label");
-  this.labels.pop();
-  node.label = expr;
-  return this.finishNode(node, "LabeledStatement")
-};
+  pp$1.parseLabeledStatement = function(node, maybeName, expr, context) {
+    for (var i$1 = 0, list = this.labels; i$1 < list.length; i$1 += 1)
+      {
+      var label = list[i$1];
 
-pp$1.parseExpressionStatement = function(node, expr) {
-  node.expression = expr;
-  this.semicolon();
-  return this.finishNode(node, "ExpressionStatement")
-};
+      if (label.name === maybeName)
+        { this.raise(expr.start, "Label '" + maybeName + "' is already declared");
+    } }
+    var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
+    for (var i = this.labels.length - 1; i >= 0; i--) {
+      var label$1 = this.labels[i];
+      if (label$1.statementStart === node.start) {
+        // Update information about previous labels on this node
+        label$1.statementStart = this.start;
+        label$1.kind = kind;
+      } else { break }
+    }
+    this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
+    node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label");
+    this.labels.pop();
+    node.label = expr;
+    return this.finishNode(node, "LabeledStatement")
+  };
 
-// Parse a semicolon-enclosed block of statements, handling `"use
-// strict"` declarations when `allowStrict` is true (used for
-// function bodies).
-
-pp$1.parseBlock = function(createNewLexicalScope, node) {
-  var this$1 = this;
-  if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
-  if ( node === void 0 ) node = this.startNode();
-
-  node.body = [];
-  this.expect(types.braceL);
-  if (createNewLexicalScope) { this.enterScope(0); }
-  while (!this.eat(types.braceR)) {
-    var stmt = this$1.parseStatement(null);
-    node.body.push(stmt);
-  }
-  if (createNewLexicalScope) { this.exitScope(); }
-  return this.finishNode(node, "BlockStatement")
-};
+  pp$1.parseExpressionStatement = function(node, expr) {
+    node.expression = expr;
+    this.semicolon();
+    return this.finishNode(node, "ExpressionStatement")
+  };
 
-// Parse a regular `for` loop. The disambiguation code in
-// `parseStatement` will already have parsed the init statement or
-// expression.
-
-pp$1.parseFor = function(node, init) {
-  node.init = init;
-  this.expect(types.semi);
-  node.test = this.type === types.semi ? null : this.parseExpression();
-  this.expect(types.semi);
-  node.update = this.type === types.parenR ? null : this.parseExpression();
-  this.expect(types.parenR);
-  node.body = this.parseStatement("for");
-  this.exitScope();
-  this.labels.pop();
-  return this.finishNode(node, "ForStatement")
-};
+  // Parse a semicolon-enclosed block of statements, handling `"use
+  // strict"` declarations when `allowStrict` is true (used for
+  // function bodies).
 
-// Parse a `for`/`in` and `for`/`of` loop, which are almost
-// same from parser's perspective.
-
-pp$1.parseForIn = function(node, init) {
-  var type = this.type === types._in ? "ForInStatement" : "ForOfStatement";
-  this.next();
-  if (type === "ForInStatement") {
-    if (init.type === "AssignmentPattern" ||
-      (init.type === "VariableDeclaration" && init.declarations[0].init != null &&
-       (this.strict || init.declarations[0].id.type !== "Identifier")))
-      { this.raise(init.start, "Invalid assignment in for-in loop head"); }
-  }
-  node.left = init;
-  node.right = type === "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign();
-  this.expect(types.parenR);
-  node.body = this.parseStatement("for");
-  this.exitScope();
-  this.labels.pop();
-  return this.finishNode(node, type)
-};
+  pp$1.parseBlock = function(createNewLexicalScope, node) {
+    if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
+    if ( node === void 0 ) node = this.startNode();
 
-// Parse a list of variable declarations.
-
-pp$1.parseVar = function(node, isFor, kind) {
-  var this$1 = this;
-
-  node.declarations = [];
-  node.kind = kind;
-  for (;;) {
-    var decl = this$1.startNode();
-    this$1.parseVarId(decl, kind);
-    if (this$1.eat(types.eq)) {
-      decl.init = this$1.parseMaybeAssign(isFor);
-    } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
-      this$1.unexpected();
-    } else if (decl.id.type !== "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) {
-      this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
-    } else {
-      decl.init = null;
+    node.body = [];
+    this.expect(types.braceL);
+    if (createNewLexicalScope) { this.enterScope(0); }
+    while (!this.eat(types.braceR)) {
+      var stmt = this.parseStatement(null);
+      node.body.push(stmt);
     }
-    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
-    if (!this$1.eat(types.comma)) { break }
-  }
-  return node
-};
+    if (createNewLexicalScope) { this.exitScope(); }
+    return this.finishNode(node, "BlockStatement")
+  };
 
-pp$1.parseVarId = function(decl, kind) {
-  if ((kind === "const" || kind === "let") && this.isContextual("let")) {
-    this.raiseRecoverable(this.start, "let is disallowed as a lexically bound name");
-  }
-  decl.id = this.parseBindingAtom();
-  this.checkLVal(decl.id, kind === "var" ? BIND_VAR : BIND_LEXICAL, false);
-};
+  // Parse a regular `for` loop. The disambiguation code in
+  // `parseStatement` will already have parsed the init statement or
+  // expression.
 
-var FUNC_STATEMENT = 1;
-var FUNC_HANGING_STATEMENT = 2;
-var FUNC_NULLABLE_ID = 4;
+  pp$1.parseFor = function(node, init) {
+    node.init = init;
+    this.expect(types.semi);
+    node.test = this.type === types.semi ? null : this.parseExpression();
+    this.expect(types.semi);
+    node.update = this.type === types.parenR ? null : this.parseExpression();
+    this.expect(types.parenR);
+    node.body = this.parseStatement("for");
+    this.exitScope();
+    this.labels.pop();
+    return this.finishNode(node, "ForStatement")
+  };
 
-// Parse a function declaration or literal (depending on the
-// `statement & FUNC_STATEMENT`).
+  // Parse a `for`/`in` and `for`/`of` loop, which are almost
+  // same from parser's perspective.
 
-// Remove `allowExpressionBody` for 7.0.0, as it is only called with false
-pp$1.parseFunction = function(node, statement, allowExpressionBody, isAsync) {
-  this.initFunction(node);
-  if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync) {
-    if (this.type === types.star && (statement & FUNC_HANGING_STATEMENT))
-      { this.unexpected(); }
-    node.generator = this.eat(types.star);
-  }
-  if (this.options.ecmaVersion >= 8)
-    { node.async = !!isAsync; }
-
-  if (statement & FUNC_STATEMENT) {
-    node.id = (statement & FUNC_NULLABLE_ID) && this.type !== types.name ? null : this.parseIdent();
-    if (node.id && !(statement & FUNC_HANGING_STATEMENT))
-      // If it is a regular function declaration in sloppy mode, then it is
-      // subject to Annex B semantics (BIND_FUNCTION). Otherwise, the binding
-      // mode depends on properties of the current scope (see
-      // treatFunctionsAsVar).
-      { this.checkLVal(node.id, (this.strict || node.generator || node.async) ? this.treatFunctionsAsVar ? BIND_VAR : BIND_LEXICAL : BIND_FUNCTION); }
-  }
+  pp$1.parseForIn = function(node, init) {
+    var isForIn = this.type === types._in;
+    this.next();
 
-  var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
-  this.yieldPos = 0;
-  this.awaitPos = 0;
-  this.awaitIdentPos = 0;
-  this.enterScope(functionFlags(node.async, node.generator));
+    if (
+      init.type === "VariableDeclaration" &&
+      init.declarations[0].init != null &&
+      (
+        !isForIn ||
+        this.options.ecmaVersion < 8 ||
+        this.strict ||
+        init.kind !== "var" ||
+        init.declarations[0].id.type !== "Identifier"
+      )
+    ) {
+      this.raise(
+        init.start,
+        ((isForIn ? "for-in" : "for-of") + " loop variable declaration may not have an initializer")
+      );
+    } else if (init.type === "AssignmentPattern") {
+      this.raise(init.start, "Invalid left-hand side in for-loop");
+    }
+    node.left = init;
+    node.right = isForIn ? this.parseExpression() : this.parseMaybeAssign();
+    this.expect(types.parenR);
+    node.body = this.parseStatement("for");
+    this.exitScope();
+    this.labels.pop();
+    return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement")
+  };
 
-  if (!(statement & FUNC_STATEMENT))
-    { node.id = this.type === types.name ? this.parseIdent() : null; }
+  // Parse a list of variable declarations.
+
+  pp$1.parseVar = function(node, isFor, kind) {
+    node.declarations = [];
+    node.kind = kind;
+    for (;;) {
+      var decl = this.startNode();
+      this.parseVarId(decl, kind);
+      if (this.eat(types.eq)) {
+        decl.init = this.parseMaybeAssign(isFor);
+      } else if (kind === "const" && !(this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of")))) {
+        this.unexpected();
+      } else if (decl.id.type !== "Identifier" && !(isFor && (this.type === types._in || this.isContextual("of")))) {
+        this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value");
+      } else {
+        decl.init = null;
+      }
+      node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
+      if (!this.eat(types.comma)) { break }
+    }
+    return node
+  };
 
-  this.parseFunctionParams(node);
-  this.parseFunctionBody(node, allowExpressionBody, false);
+  pp$1.parseVarId = function(decl, kind) {
+    decl.id = this.parseBindingAtom();
+    this.checkLVal(decl.id, kind === "var" ? BIND_VAR : BIND_LEXICAL, false);
+  };
 
-  this.yieldPos = oldYieldPos;
-  this.awaitPos = oldAwaitPos;
-  this.awaitIdentPos = oldAwaitIdentPos;
-  return this.finishNode(node, (statement & FUNC_STATEMENT) ? "FunctionDeclaration" : "FunctionExpression")
-};
+  var FUNC_STATEMENT = 1, FUNC_HANGING_STATEMENT = 2, FUNC_NULLABLE_ID = 4;
 
-pp$1.parseFunctionParams = function(node) {
-  this.expect(types.parenL);
-  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
-  this.checkYieldAwaitInDefaultParams();
-};
+  // Parse a function declaration or literal (depending on the
+  // `statement & FUNC_STATEMENT`).
 
-// Parse a class declaration or literal (depending on the
-// `isStatement` parameter).
+  // Remove `allowExpressionBody` for 7.0.0, as it is only called with false
+  pp$1.parseFunction = function(node, statement, allowExpressionBody, isAsync) {
+    this.initFunction(node);
+    if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync) {
+      if (this.type === types.star && (statement & FUNC_HANGING_STATEMENT))
+        { this.unexpected(); }
+      node.generator = this.eat(types.star);
+    }
+    if (this.options.ecmaVersion >= 8)
+      { node.async = !!isAsync; }
 
-pp$1.parseClass = function(node, isStatement) {
-  var this$1 = this;
+    if (statement & FUNC_STATEMENT) {
+      node.id = (statement & FUNC_NULLABLE_ID) && this.type !== types.name ? null : this.parseIdent();
+      if (node.id && !(statement & FUNC_HANGING_STATEMENT))
+        // If it is a regular function declaration in sloppy mode, then it is
+        // subject to Annex B semantics (BIND_FUNCTION). Otherwise, the binding
+        // mode depends on properties of the current scope (see
+        // treatFunctionsAsVar).
+        { this.checkLVal(node.id, (this.strict || node.generator || node.async) ? this.treatFunctionsAsVar ? BIND_VAR : BIND_LEXICAL : BIND_FUNCTION); }
+    }
 
-  this.next();
+    var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
+    this.yieldPos = 0;
+    this.awaitPos = 0;
+    this.awaitIdentPos = 0;
+    this.enterScope(functionFlags(node.async, node.generator));
 
-  // ecma-262 14.6 Class Definitions
-  // A class definition is always strict mode code.
-  var oldStrict = this.strict;
-  this.strict = true;
+    if (!(statement & FUNC_STATEMENT))
+      { node.id = this.type === types.name ? this.parseIdent() : null; }
 
-  this.parseClassId(node, isStatement);
-  this.parseClassSuper(node);
-  var classBody = this.startNode();
-  var hadConstructor = false;
-  classBody.body = [];
-  this.expect(types.braceL);
-  while (!this.eat(types.braceR)) {
-    var element = this$1.parseClassElement(node.superClass !== null);
-    if (element) {
-      classBody.body.push(element);
-      if (element.type === "MethodDefinition" && element.kind === "constructor") {
-        if (hadConstructor) { this$1.raise(element.start, "Duplicate constructor in the same class"); }
-        hadConstructor = true;
-      }
-    }
-  }
-  node.body = this.finishNode(classBody, "ClassBody");
-  this.strict = oldStrict;
-  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-};
+    this.parseFunctionParams(node);
+    this.parseFunctionBody(node, allowExpressionBody, false);
 
-pp$1.parseClassElement = function(constructorAllowsSuper) {
-  var this$1 = this;
+    this.yieldPos = oldYieldPos;
+    this.awaitPos = oldAwaitPos;
+    this.awaitIdentPos = oldAwaitIdentPos;
+    return this.finishNode(node, (statement & FUNC_STATEMENT) ? "FunctionDeclaration" : "FunctionExpression")
+  };
 
-  if (this.eat(types.semi)) { return null }
+  pp$1.parseFunctionParams = function(node) {
+    this.expect(types.parenL);
+    node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+    this.checkYieldAwaitInDefaultParams();
+  };
 
-  var method = this.startNode();
-  var tryContextual = function (k, noLineBreak) {
-    if ( noLineBreak === void 0 ) noLineBreak = false;
+  // Parse a class declaration or literal (depending on the
+  // `isStatement` parameter).
 
-    var start = this$1.start, startLoc = this$1.startLoc;
-    if (!this$1.eatContextual(k)) { return false }
-    if (this$1.type !== types.parenL && (!noLineBreak || !this$1.canInsertSemicolon())) { return true }
-    if (method.key) { this$1.unexpected(); }
-    method.computed = false;
-    method.key = this$1.startNodeAt(start, startLoc);
-    method.key.name = k;
-    this$1.finishNode(method.key, "Identifier");
-    return false
-  };
+  pp$1.parseClass = function(node, isStatement) {
+    this.next();
 
-  method.kind = "method";
-  method.static = tryContextual("static");
-  var isGenerator = this.eat(types.star);
-  var isAsync = false;
-  if (!isGenerator) {
-    if (this.options.ecmaVersion >= 8 && tryContextual("async", true)) {
-      isAsync = true;
-      isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
-    } else if (tryContextual("get")) {
-      method.kind = "get";
-    } else if (tryContextual("set")) {
-      method.kind = "set";
+    // ecma-262 14.6 Class Definitions
+    // A class definition is always strict mode code.
+    var oldStrict = this.strict;
+    this.strict = true;
+
+    this.parseClassId(node, isStatement);
+    this.parseClassSuper(node);
+    var classBody = this.startNode();
+    var hadConstructor = false;
+    classBody.body = [];
+    this.expect(types.braceL);
+    while (!this.eat(types.braceR)) {
+      var element = this.parseClassElement(node.superClass !== null);
+      if (element) {
+        classBody.body.push(element);
+        if (element.type === "MethodDefinition" && element.kind === "constructor") {
+          if (hadConstructor) { this.raise(element.start, "Duplicate constructor in the same class"); }
+          hadConstructor = true;
+        }
+      }
     }
-  }
-  if (!method.key) { this.parsePropertyName(method); }
-  var key = method.key;
-  var allowsDirectSuper = false;
-  if (!method.computed && !method.static && (key.type === "Identifier" && key.name === "constructor" ||
-      key.type === "Literal" && key.value === "constructor")) {
-    if (method.kind !== "method") { this.raise(key.start, "Constructor can't have get/set modifier"); }
-    if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); }
-    if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); }
-    method.kind = "constructor";
-    allowsDirectSuper = constructorAllowsSuper;
-  } else if (method.static && key.type === "Identifier" && key.name === "prototype") {
-    this.raise(key.start, "Classes may not have a static property named prototype");
-  }
-  this.parseClassMethod(method, isGenerator, isAsync, allowsDirectSuper);
-  if (method.kind === "get" && method.value.params.length !== 0)
-    { this.raiseRecoverable(method.value.start, "getter should have no params"); }
-  if (method.kind === "set" && method.value.params.length !== 1)
-    { this.raiseRecoverable(method.value.start, "setter should have exactly one param"); }
-  if (method.kind === "set" && method.value.params[0].type === "RestElement")
-    { this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); }
-  return method
-};
+    node.body = this.finishNode(classBody, "ClassBody");
+    this.strict = oldStrict;
+    return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
+  };
 
-pp$1.parseClassMethod = function(method, isGenerator, isAsync, allowsDirectSuper) {
-  method.value = this.parseMethod(isGenerator, isAsync, allowsDirectSuper);
-  return this.finishNode(method, "MethodDefinition")
-};
+  pp$1.parseClassElement = function(constructorAllowsSuper) {
+    var this$1 = this;
 
-pp$1.parseClassId = function(node, isStatement) {
-  if (this.type === types.name) {
-    node.id = this.parseIdent();
-    if (isStatement)
-      { this.checkLVal(node.id, BIND_LEXICAL, false); }
-  } else {
-    if (isStatement === true)
-      { this.unexpected(); }
-    node.id = null;
-  }
-};
+    if (this.eat(types.semi)) { return null }
 
-pp$1.parseClassSuper = function(node) {
-  node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
-};
+    var method = this.startNode();
+    var tryContextual = function (k, noLineBreak) {
+      if ( noLineBreak === void 0 ) noLineBreak = false;
 
-// Parses module export declaration.
+      var start = this$1.start, startLoc = this$1.startLoc;
+      if (!this$1.eatContextual(k)) { return false }
+      if (this$1.type !== types.parenL && (!noLineBreak || !this$1.canInsertSemicolon())) { return true }
+      if (method.key) { this$1.unexpected(); }
+      method.computed = false;
+      method.key = this$1.startNodeAt(start, startLoc);
+      method.key.name = k;
+      this$1.finishNode(method.key, "Identifier");
+      return false
+    };
 
-pp$1.parseExport = function(node, exports) {
-  var this$1 = this;
+    method.kind = "method";
+    method.static = tryContextual("static");
+    var isGenerator = this.eat(types.star);
+    var isAsync = false;
+    if (!isGenerator) {
+      if (this.options.ecmaVersion >= 8 && tryContextual("async", true)) {
+        isAsync = true;
+        isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
+      } else if (tryContextual("get")) {
+        method.kind = "get";
+      } else if (tryContextual("set")) {
+        method.kind = "set";
+      }
+    }
+    if (!method.key) { this.parsePropertyName(method); }
+    var key = method.key;
+    var allowsDirectSuper = false;
+    if (!method.computed && !method.static && (key.type === "Identifier" && key.name === "constructor" ||
+        key.type === "Literal" && key.value === "constructor")) {
+      if (method.kind !== "method") { this.raise(key.start, "Constructor can't have get/set modifier"); }
+      if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); }
+      if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); }
+      method.kind = "constructor";
+      allowsDirectSuper = constructorAllowsSuper;
+    } else if (method.static && key.type === "Identifier" && key.name === "prototype") {
+      this.raise(key.start, "Classes may not have a static property named prototype");
+    }
+    this.parseClassMethod(method, isGenerator, isAsync, allowsDirectSuper);
+    if (method.kind === "get" && method.value.params.length !== 0)
+      { this.raiseRecoverable(method.value.start, "getter should have no params"); }
+    if (method.kind === "set" && method.value.params.length !== 1)
+      { this.raiseRecoverable(method.value.start, "setter should have exactly one param"); }
+    if (method.kind === "set" && method.value.params[0].type === "RestElement")
+      { this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); }
+    return method
+  };
 
-  this.next();
-  // export * from '...'
-  if (this.eat(types.star)) {
-    this.expectContextual("from");
-    if (this.type !== types.string) { this.unexpected(); }
-    node.source = this.parseExprAtom();
-    this.semicolon();
-    return this.finishNode(node, "ExportAllDeclaration")
-  }
-  if (this.eat(types._default)) { // export default ...
-    this.checkExport(exports, "default", this.lastTokStart);
-    var isAsync;
-    if (this.type === types._function || (isAsync = this.isAsyncFunction())) {
-      var fNode = this.startNode();
-      this.next();
-      if (isAsync) { this.next(); }
-      node.declaration = this.parseFunction(fNode, FUNC_STATEMENT | FUNC_NULLABLE_ID, false, isAsync);
-    } else if (this.type === types._class) {
-      var cNode = this.startNode();
-      node.declaration = this.parseClass(cNode, "nullableID");
+  pp$1.parseClassMethod = function(method, isGenerator, isAsync, allowsDirectSuper) {
+    method.value = this.parseMethod(isGenerator, isAsync, allowsDirectSuper);
+    return this.finishNode(method, "MethodDefinition")
+  };
+
+  pp$1.parseClassId = function(node, isStatement) {
+    if (this.type === types.name) {
+      node.id = this.parseIdent();
+      if (isStatement)
+        { this.checkLVal(node.id, BIND_LEXICAL, false); }
     } else {
-      node.declaration = this.parseMaybeAssign();
-      this.semicolon();
+      if (isStatement === true)
+        { this.unexpected(); }
+      node.id = null;
     }
-    return this.finishNode(node, "ExportDefaultDeclaration")
-  }
-  // export var|const|let|function|class ...
-  if (this.shouldParseExportStatement()) {
-    node.declaration = this.parseStatement(null);
-    if (node.declaration.type === "VariableDeclaration")
-      { this.checkVariableExport(exports, node.declaration.declarations); }
-    else
-      { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
-    node.specifiers = [];
-    node.source = null;
-  } else { // export { x, y as z } [from '...']
-    node.declaration = null;
-    node.specifiers = this.parseExportSpecifiers(exports);
-    if (this.eatContextual("from")) {
+  };
+
+  pp$1.parseClassSuper = function(node) {
+    node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
+  };
+
+  // Parses module export declaration.
+
+  pp$1.parseExport = function(node, exports) {
+    this.next();
+    // export * from '...'
+    if (this.eat(types.star)) {
+      this.expectContextual("from");
       if (this.type !== types.string) { this.unexpected(); }
       node.source = this.parseExprAtom();
-    } else {
-      for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
-        // check for keywords used as local names
-        var spec = list[i];
-
-        this$1.checkUnreserved(spec.local);
-        // check if export is defined
-        this$1.checkLocalExport(spec.local);
+      this.semicolon();
+      return this.finishNode(node, "ExportAllDeclaration")
+    }
+    if (this.eat(types._default)) { // export default ...
+      this.checkExport(exports, "default", this.lastTokStart);
+      var isAsync;
+      if (this.type === types._function || (isAsync = this.isAsyncFunction())) {
+        var fNode = this.startNode();
+        this.next();
+        if (isAsync) { this.next(); }
+        node.declaration = this.parseFunction(fNode, FUNC_STATEMENT | FUNC_NULLABLE_ID, false, isAsync);
+      } else if (this.type === types._class) {
+        var cNode = this.startNode();
+        node.declaration = this.parseClass(cNode, "nullableID");
+      } else {
+        node.declaration = this.parseMaybeAssign();
+        this.semicolon();
       }
-
-      node.source = null;
+      return this.finishNode(node, "ExportDefaultDeclaration")
     }
-    this.semicolon();
-  }
-  return this.finishNode(node, "ExportNamedDeclaration")
-};
+    // export var|const|let|function|class ...
+    if (this.shouldParseExportStatement()) {
+      node.declaration = this.parseStatement(null);
+      if (node.declaration.type === "VariableDeclaration")
+        { this.checkVariableExport(exports, node.declaration.declarations); }
+      else
+        { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
+      node.specifiers = [];
+      node.source = null;
+    } else { // export { x, y as z } [from '...']
+      node.declaration = null;
+      node.specifiers = this.parseExportSpecifiers(exports);
+      if (this.eatContextual("from")) {
+        if (this.type !== types.string) { this.unexpected(); }
+        node.source = this.parseExprAtom();
+      } else {
+        for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
+          // check for keywords used as local names
+          var spec = list[i];
 
-pp$1.checkExport = function(exports, name, pos) {
-  if (!exports) { return }
-  if (has(exports, name))
-    { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
-  exports[name] = true;
-};
+          this.checkUnreserved(spec.local);
+          // check if export is defined
+          this.checkLocalExport(spec.local);
+        }
 
-pp$1.checkPatternExport = function(exports, pat) {
-  var this$1 = this;
+        node.source = null;
+      }
+      this.semicolon();
+    }
+    return this.finishNode(node, "ExportNamedDeclaration")
+  };
 
-  var type = pat.type;
-  if (type === "Identifier")
-    { this.checkExport(exports, pat.name, pat.start); }
-  else if (type === "ObjectPattern")
-    { for (var i = 0, list = pat.properties; i < list.length; i += 1)
-      {
-        var prop = list[i];
+  pp$1.checkExport = function(exports, name, pos) {
+    if (!exports) { return }
+    if (has(exports, name))
+      { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
+    exports[name] = true;
+  };
 
-        this$1.checkPatternExport(exports, prop);
+  pp$1.checkPatternExport = function(exports, pat) {
+    var type = pat.type;
+    if (type === "Identifier")
+      { this.checkExport(exports, pat.name, pat.start); }
+    else if (type === "ObjectPattern")
+      { for (var i = 0, list = pat.properties; i < list.length; i += 1)
+        {
+          var prop = list[i];
+
+          this.checkPatternExport(exports, prop);
+        } }
+    else if (type === "ArrayPattern")
+      { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
+        var elt = list$1[i$1];
+
+          if (elt) { this.checkPatternExport(exports, elt); }
       } }
-  else if (type === "ArrayPattern")
-    { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
-      var elt = list$1[i$1];
-
-        if (elt) { this$1.checkPatternExport(exports, elt); }
-    } }
-  else if (type === "Property")
-    { this.checkPatternExport(exports, pat.value); }
-  else if (type === "AssignmentPattern")
-    { this.checkPatternExport(exports, pat.left); }
-  else if (type === "RestElement")
-    { this.checkPatternExport(exports, pat.argument); }
-  else if (type === "ParenthesizedExpression")
-    { this.checkPatternExport(exports, pat.expression); }
-};
-
-pp$1.checkVariableExport = function(exports, decls) {
-  var this$1 = this;
+    else if (type === "Property")
+      { this.checkPatternExport(exports, pat.value); }
+    else if (type === "AssignmentPattern")
+      { this.checkPatternExport(exports, pat.left); }
+    else if (type === "RestElement")
+      { this.checkPatternExport(exports, pat.argument); }
+    else if (type === "ParenthesizedExpression")
+      { this.checkPatternExport(exports, pat.expression); }
+  };
 
-  if (!exports) { return }
-  for (var i = 0, list = decls; i < list.length; i += 1)
-    {
-    var decl = list[i];
+  pp$1.checkVariableExport = function(exports, decls) {
+    if (!exports) { return }
+    for (var i = 0, list = decls; i < list.length; i += 1)
+      {
+      var decl = list[i];
 
-    this$1.checkPatternExport(exports, decl.id);
-  }
-};
+      this.checkPatternExport(exports, decl.id);
+    }
+  };
 
-pp$1.shouldParseExportStatement = function() {
-  return this.type.keyword === "var" ||
-    this.type.keyword === "const" ||
-    this.type.keyword === "class" ||
-    this.type.keyword === "function" ||
-    this.isLet() ||
-    this.isAsyncFunction()
-};
+  pp$1.shouldParseExportStatement = function() {
+    return this.type.keyword === "var" ||
+      this.type.keyword === "const" ||
+      this.type.keyword === "class" ||
+      this.type.keyword === "function" ||
+      this.isLet() ||
+      this.isAsyncFunction()
+  };
 
-// Parses a comma-separated list of module exports.
-
-pp$1.parseExportSpecifiers = function(exports) {
-  var this$1 = this;
-
-  var nodes = [], first = true;
-  // export { x, y as z } [from '...']
-  this.expect(types.braceL);
-  while (!this.eat(types.braceR)) {
-    if (!first) {
-      this$1.expect(types.comma);
-      if (this$1.afterTrailingComma(types.braceR)) { break }
-    } else { first = false; }
-
-    var node = this$1.startNode();
-    node.local = this$1.parseIdent(true);
-    node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
-    this$1.checkExport(exports, node.exported.name, node.exported.start);
-    nodes.push(this$1.finishNode(node, "ExportSpecifier"));
-  }
-  return nodes
-};
+  // Parses a comma-separated list of module exports.
 
-// Parses import declaration.
-
-pp$1.parseImport = function(node) {
-  this.next();
-  // import '...'
-  if (this.type === types.string) {
-    node.specifiers = empty;
-    node.source = this.parseExprAtom();
-  } else {
-    node.specifiers = this.parseImportSpecifiers();
-    this.expectContextual("from");
-    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
-  }
-  this.semicolon();
-  return this.finishNode(node, "ImportDeclaration")
-};
+  pp$1.parseExportSpecifiers = function(exports) {
+    var nodes = [], first = true;
+    // export { x, y as z } [from '...']
+    this.expect(types.braceL);
+    while (!this.eat(types.braceR)) {
+      if (!first) {
+        this.expect(types.comma);
+        if (this.afterTrailingComma(types.braceR)) { break }
+      } else { first = false; }
 
-// Parses a comma-separated list of module imports.
+      var node = this.startNode();
+      node.local = this.parseIdent(true);
+      node.exported = this.eatContextual("as") ? this.parseIdent(true) : node.local;
+      this.checkExport(exports, node.exported.name, node.exported.start);
+      nodes.push(this.finishNode(node, "ExportSpecifier"));
+    }
+    return nodes
+  };
 
-pp$1.parseImportSpecifiers = function() {
-  var this$1 = this;
+  // Parses import declaration.
 
-  var nodes = [], first = true;
-  if (this.type === types.name) {
-    // import defaultObj, { x, y as z } from '...'
-    var node = this.startNode();
-    node.local = this.parseIdent();
-    this.checkLVal(node.local, BIND_LEXICAL);
-    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
-    if (!this.eat(types.comma)) { return nodes }
-  }
-  if (this.type === types.star) {
-    var node$1 = this.startNode();
+  pp$1.parseImport = function(node) {
     this.next();
-    this.expectContextual("as");
-    node$1.local = this.parseIdent();
-    this.checkLVal(node$1.local, BIND_LEXICAL);
-    nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
-    return nodes
-  }
-  this.expect(types.braceL);
-  while (!this.eat(types.braceR)) {
-    if (!first) {
-      this$1.expect(types.comma);
-      if (this$1.afterTrailingComma(types.braceR)) { break }
-    } else { first = false; }
-
-    var node$2 = this$1.startNode();
-    node$2.imported = this$1.parseIdent(true);
-    if (this$1.eatContextual("as")) {
-      node$2.local = this$1.parseIdent();
+    // import '...'
+    if (this.type === types.string) {
+      node.specifiers = empty;
+      node.source = this.parseExprAtom();
     } else {
-      this$1.checkUnreserved(node$2.imported);
-      node$2.local = node$2.imported;
+      node.specifiers = this.parseImportSpecifiers();
+      this.expectContextual("from");
+      node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
     }
-    this$1.checkLVal(node$2.local, BIND_LEXICAL);
-    nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
-  }
-  return nodes
-};
+    this.semicolon();
+    return this.finishNode(node, "ImportDeclaration")
+  };
 
-// Set `ExpressionStatement#directive` property for directive prologues.
-pp$1.adaptDirectivePrologue = function(statements) {
-  for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) {
-    statements[i].directive = statements[i].expression.raw.slice(1, -1);
-  }
-};
-pp$1.isDirectiveCandidate = function(statement) {
-  return (
-    statement.type === "ExpressionStatement" &&
-    statement.expression.type === "Literal" &&
-    typeof statement.expression.value === "string" &&
-    // Reject parenthesized strings.
-    (this.input[statement.start] === "\"" || this.input[statement.start] === "'")
-  )
-};
+  // Parses a comma-separated list of module imports.
 
-var pp$2 = Parser.prototype;
+  pp$1.parseImportSpecifiers = function() {
+    var nodes = [], first = true;
+    if (this.type === types.name) {
+      // import defaultObj, { x, y as z } from '...'
+      var node = this.startNode();
+      node.local = this.parseIdent();
+      this.checkLVal(node.local, BIND_LEXICAL);
+      nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
+      if (!this.eat(types.comma)) { return nodes }
+    }
+    if (this.type === types.star) {
+      var node$1 = this.startNode();
+      this.next();
+      this.expectContextual("as");
+      node$1.local = this.parseIdent();
+      this.checkLVal(node$1.local, BIND_LEXICAL);
+      nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
+      return nodes
+    }
+    this.expect(types.braceL);
+    while (!this.eat(types.braceR)) {
+      if (!first) {
+        this.expect(types.comma);
+        if (this.afterTrailingComma(types.braceR)) { break }
+      } else { first = false; }
+
+      var node$2 = this.startNode();
+      node$2.imported = this.parseIdent(true);
+      if (this.eatContextual("as")) {
+        node$2.local = this.parseIdent();
+      } else {
+        this.checkUnreserved(node$2.imported);
+        node$2.local = node$2.imported;
+      }
+      this.checkLVal(node$2.local, BIND_LEXICAL);
+      nodes.push(this.finishNode(node$2, "ImportSpecifier"));
+    }
+    return nodes
+  };
 
-// Convert existing expression atom to assignable pattern
-// if possible.
+  // Set `ExpressionStatement#directive` property for directive prologues.
+  pp$1.adaptDirectivePrologue = function(statements) {
+    for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) {
+      statements[i].directive = statements[i].expression.raw.slice(1, -1);
+    }
+  };
+  pp$1.isDirectiveCandidate = function(statement) {
+    return (
+      statement.type === "ExpressionStatement" &&
+      statement.expression.type === "Literal" &&
+      typeof statement.expression.value === "string" &&
+      // Reject parenthesized strings.
+      (this.input[statement.start] === "\"" || this.input[statement.start] === "'")
+    )
+  };
 
-pp$2.toAssignable = function(node, isBinding, refDestructuringErrors) {
-  var this$1 = this;
+  var pp$2 = Parser.prototype;
 
-  if (this.options.ecmaVersion >= 6 && node) {
-    switch (node.type) {
-    case "Identifier":
-      if (this.inAsync && node.name === "await")
-        { this.raise(node.start, "Cannot use 'await' as identifier inside an async function"); }
-      break
+  // Convert existing expression atom to assignable pattern
+  // if possible.
 
-    case "ObjectPattern":
-    case "ArrayPattern":
-    case "RestElement":
-      break
+  pp$2.toAssignable = function(node, isBinding, refDestructuringErrors) {
+    if (this.options.ecmaVersion >= 6 && node) {
+      switch (node.type) {
+      case "Identifier":
+        if (this.inAsync && node.name === "await")
+          { this.raise(node.start, "Cannot use 'await' as identifier inside an async function"); }
+        break
 
-    case "ObjectExpression":
-      node.type = "ObjectPattern";
-      if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
-      for (var i = 0, list = node.properties; i < list.length; i += 1) {
-        var prop = list[i];
+      case "ObjectPattern":
+      case "ArrayPattern":
+      case "RestElement":
+        break
 
-      this$1.toAssignable(prop, isBinding);
-        // Early error:
-        //   AssignmentRestProperty[Yield, Await] :
-        //     `...` DestructuringAssignmentTarget[Yield, Await]
-        //
-        //   It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|.
-        if (
-          prop.type === "RestElement" &&
-          (prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern")
-        ) {
-          this$1.raise(prop.argument.start, "Unexpected token");
+      case "ObjectExpression":
+        node.type = "ObjectPattern";
+        if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
+        for (var i = 0, list = node.properties; i < list.length; i += 1) {
+          var prop = list[i];
+
+        this.toAssignable(prop, isBinding);
+          // Early error:
+          //   AssignmentRestProperty[Yield, Await] :
+          //     `...` DestructuringAssignmentTarget[Yield, Await]
+          //
+          //   It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|.
+          if (
+            prop.type === "RestElement" &&
+            (prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern")
+          ) {
+            this.raise(prop.argument.start, "Unexpected token");
+          }
         }
-      }
-      break
+        break
 
-    case "Property":
-      // AssignmentProperty has type === "Property"
-      if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); }
-      this.toAssignable(node.value, isBinding);
-      break
+      case "Property":
+        // AssignmentProperty has type === "Property"
+        if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); }
+        this.toAssignable(node.value, isBinding);
+        break
 
-    case "ArrayExpression":
-      node.type = "ArrayPattern";
-      if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
-      this.toAssignableList(node.elements, isBinding);
-      break
+      case "ArrayExpression":
+        node.type = "ArrayPattern";
+        if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
+        this.toAssignableList(node.elements, isBinding);
+        break
 
-    case "SpreadElement":
-      node.type = "RestElement";
-      this.toAssignable(node.argument, isBinding);
-      if (node.argument.type === "AssignmentPattern")
-        { this.raise(node.argument.start, "Rest elements cannot have a default value"); }
-      break
+      case "SpreadElement":
+        node.type = "RestElement";
+        this.toAssignable(node.argument, isBinding);
+        if (node.argument.type === "AssignmentPattern")
+          { this.raise(node.argument.start, "Rest elements cannot have a default value"); }
+        break
 
-    case "AssignmentExpression":
-      if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); }
-      node.type = "AssignmentPattern";
-      delete node.operator;
-      this.toAssignable(node.left, isBinding);
-      // falls through to AssignmentPattern
+      case "AssignmentExpression":
+        if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); }
+        node.type = "AssignmentPattern";
+        delete node.operator;
+        this.toAssignable(node.left, isBinding);
+        // falls through to AssignmentPattern
 
-    case "AssignmentPattern":
-      break
+      case "AssignmentPattern":
+        break
 
-    case "ParenthesizedExpression":
-      this.toAssignable(node.expression, isBinding, refDestructuringErrors);
-      break
+      case "ParenthesizedExpression":
+        this.toAssignable(node.expression, isBinding, refDestructuringErrors);
+        break
 
-    case "MemberExpression":
-      if (!isBinding) { break }
+      case "MemberExpression":
+        if (!isBinding) { break }
 
-    default:
-      this.raise(node.start, "Assigning to rvalue");
+      default:
+        this.raise(node.start, "Assigning to rvalue");
+      }
+    } else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
+    return node
+  };
+
+  // Convert list of expression atoms to binding list.
+
+  pp$2.toAssignableList = function(exprList, isBinding) {
+    var end = exprList.length;
+    for (var i = 0; i < end; i++) {
+      var elt = exprList[i];
+      if (elt) { this.toAssignable(elt, isBinding); }
     }
-  } else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
-  return node
-};
+    if (end) {
+      var last = exprList[end - 1];
+      if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
+        { this.unexpected(last.argument.start); }
+    }
+    return exprList
+  };
 
-// Convert list of expression atoms to binding list.
+  // Parses spread element.
 
-pp$2.toAssignableList = function(exprList, isBinding) {
-  var this$1 = this;
+  pp$2.parseSpread = function(refDestructuringErrors) {
+    var node = this.startNode();
+    this.next();
+    node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
+    return this.finishNode(node, "SpreadElement")
+  };
 
-  var end = exprList.length;
-  for (var i = 0; i < end; i++) {
-    var elt = exprList[i];
-    if (elt) { this$1.toAssignable(elt, isBinding); }
-  }
-  if (end) {
-    var last = exprList[end - 1];
-    if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
-      { this.unexpected(last.argument.start); }
-  }
-  return exprList
-};
+  pp$2.parseRestBinding = function() {
+    var node = this.startNode();
+    this.next();
 
-// Parses spread element.
+    // RestElement inside of a function parameter must be an identifier
+    if (this.options.ecmaVersion === 6 && this.type !== types.name)
+      { this.unexpected(); }
 
-pp$2.parseSpread = function(refDestructuringErrors) {
-  var node = this.startNode();
-  this.next();
-  node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
-  return this.finishNode(node, "SpreadElement")
-};
+    node.argument = this.parseBindingAtom();
 
-pp$2.parseRestBinding = function() {
-  var node = this.startNode();
-  this.next();
+    return this.finishNode(node, "RestElement")
+  };
 
-  // RestElement inside of a function parameter must be an identifier
-  if (this.options.ecmaVersion === 6 && this.type !== types.name)
-    { this.unexpected(); }
+  // Parses lvalue (assignable) atom.
 
-  node.argument = this.parseBindingAtom();
+  pp$2.parseBindingAtom = function() {
+    if (this.options.ecmaVersion >= 6) {
+      switch (this.type) {
+      case types.bracketL:
+        var node = this.startNode();
+        this.next();
+        node.elements = this.parseBindingList(types.bracketR, true, true);
+        return this.finishNode(node, "ArrayPattern")
+
+      case types.braceL:
+        return this.parseObj(true)
+      }
+    }
+    return this.parseIdent()
+  };
 
-  return this.finishNode(node, "RestElement")
-};
+  pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
+    var elts = [], first = true;
+    while (!this.eat(close)) {
+      if (first) { first = false; }
+      else { this.expect(types.comma); }
+      if (allowEmpty && this.type === types.comma) {
+        elts.push(null);
+      } else if (allowTrailingComma && this.afterTrailingComma(close)) {
+        break
+      } else if (this.type === types.ellipsis) {
+        var rest = this.parseRestBinding();
+        this.parseBindingListItem(rest);
+        elts.push(rest);
+        if (this.type === types.comma) { this.raise(this.start, "Comma is not permitted after the rest element"); }
+        this.expect(close);
+        break
+      } else {
+        var elem = this.parseMaybeDefault(this.start, this.startLoc);
+        this.parseBindingListItem(elem);
+        elts.push(elem);
+      }
+    }
+    return elts
+  };
 
-// Parses lvalue (assignable) atom.
+  pp$2.parseBindingListItem = function(param) {
+    return param
+  };
 
-pp$2.parseBindingAtom = function() {
-  if (this.options.ecmaVersion >= 6) {
-    switch (this.type) {
-    case types.bracketL:
-      var node = this.startNode();
-      this.next();
-      node.elements = this.parseBindingList(types.bracketR, true, true);
-      return this.finishNode(node, "ArrayPattern")
+  // Parses assignment pattern around given atom if possible.
 
-    case types.braceL:
-      return this.parseObj(true)
-    }
-  }
-  return this.parseIdent()
-};
+  pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
+    left = left || this.parseBindingAtom();
+    if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left }
+    var node = this.startNodeAt(startPos, startLoc);
+    node.left = left;
+    node.right = this.parseMaybeAssign();
+    return this.finishNode(node, "AssignmentPattern")
+  };
+
+  // Verify that a node is an lval — something that can be assigned
+  // to.
+  // bindingType can be either:
+  // 'var' indicating that the lval creates a 'var' binding
+  // 'let' indicating that the lval creates a lexical ('let' or 'const') binding
+  // 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references
 
-pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
-  var this$1 = this;
+  pp$2.checkLVal = function(expr, bindingType, checkClashes) {
+    if ( bindingType === void 0 ) bindingType = BIND_NONE;
 
-  var elts = [], first = true;
-  while (!this.eat(close)) {
-    if (first) { first = false; }
-    else { this$1.expect(types.comma); }
-    if (allowEmpty && this$1.type === types.comma) {
-      elts.push(null);
-    } else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
+    switch (expr.type) {
+    case "Identifier":
+      if (bindingType === BIND_LEXICAL && expr.name === "let")
+        { this.raiseRecoverable(expr.start, "let is disallowed as a lexically bound name"); }
+      if (this.strict && this.reservedWordsStrictBind.test(expr.name))
+        { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
+      if (checkClashes) {
+        if (has(checkClashes, expr.name))
+          { this.raiseRecoverable(expr.start, "Argument name clash"); }
+        checkClashes[expr.name] = true;
+      }
+      if (bindingType !== BIND_NONE && bindingType !== BIND_OUTSIDE) { this.declareName(expr.name, bindingType, expr.start); }
       break
-    } else if (this$1.type === types.ellipsis) {
-      var rest = this$1.parseRestBinding();
-      this$1.parseBindingListItem(rest);
-      elts.push(rest);
-      if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
-      this$1.expect(close);
+
+    case "MemberExpression":
+      if (bindingType) { this.raiseRecoverable(expr.start, "Binding member expression"); }
       break
-    } else {
-      var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
-      this$1.parseBindingListItem(elem);
-      elts.push(elem);
-    }
-  }
-  return elts
-};
 
-pp$2.parseBindingListItem = function(param) {
-  return param
-};
+    case "ObjectPattern":
+      for (var i = 0, list = expr.properties; i < list.length; i += 1)
+        {
+      var prop = list[i];
 
-// Parses assignment pattern around given atom if possible.
+      this.checkLVal(prop, bindingType, checkClashes);
+    }
+      break
 
-pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
-  left = left || this.parseBindingAtom();
-  if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left }
-  var node = this.startNodeAt(startPos, startLoc);
-  node.left = left;
-  node.right = this.parseMaybeAssign();
-  return this.finishNode(node, "AssignmentPattern")
-};
+    case "Property":
+      // AssignmentProperty has type === "Property"
+      this.checkLVal(expr.value, bindingType, checkClashes);
+      break
 
-// Verify that a node is an lval — something that can be assigned
-// to.
-// bindingType can be either:
-// 'var' indicating that the lval creates a 'var' binding
-// 'let' indicating that the lval creates a lexical ('let' or 'const') binding
-// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references
-
-pp$2.checkLVal = function(expr, bindingType, checkClashes) {
-  var this$1 = this;
-  if ( bindingType === void 0 ) bindingType = BIND_NONE;
-
-  switch (expr.type) {
-  case "Identifier":
-    if (this.strict && this.reservedWordsStrictBind.test(expr.name))
-      { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
-    if (checkClashes) {
-      if (has(checkClashes, expr.name))
-        { this.raiseRecoverable(expr.start, "Argument name clash"); }
-      checkClashes[expr.name] = true;
-    }
-    if (bindingType !== BIND_NONE && bindingType !== BIND_OUTSIDE) { this.declareName(expr.name, bindingType, expr.start); }
-    break
-
-  case "MemberExpression":
-    if (bindingType) { this.raiseRecoverable(expr.start, "Binding member expression"); }
-    break
-
-  case "ObjectPattern":
-    for (var i = 0, list = expr.properties; i < list.length; i += 1)
-      {
-    var prop = list[i];
+    case "ArrayPattern":
+      for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
+        var elem = list$1[i$1];
 
-    this$1.checkLVal(prop, bindingType, checkClashes);
-  }
-    break
+      if (elem) { this.checkLVal(elem, bindingType, checkClashes); }
+      }
+      break
 
-  case "Property":
-    // AssignmentProperty has type === "Property"
-    this.checkLVal(expr.value, bindingType, checkClashes);
-    break
+    case "AssignmentPattern":
+      this.checkLVal(expr.left, bindingType, checkClashes);
+      break
 
-  case "ArrayPattern":
-    for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
-      var elem = list$1[i$1];
+    case "RestElement":
+      this.checkLVal(expr.argument, bindingType, checkClashes);
+      break
 
-    if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); }
-    }
-    break
+    case "ParenthesizedExpression":
+      this.checkLVal(expr.expression, bindingType, checkClashes);
+      break
 
-  case "AssignmentPattern":
-    this.checkLVal(expr.left, bindingType, checkClashes);
-    break
+    default:
+      this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue");
+    }
+  };
 
-  case "RestElement":
-    this.checkLVal(expr.argument, bindingType, checkClashes);
-    break
+  // A recursive descent parser operates by defining functions for all
 
-  case "ParenthesizedExpression":
-    this.checkLVal(expr.expression, bindingType, checkClashes);
-    break
+  var pp$3 = Parser.prototype;
 
-  default:
-    this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue");
-  }
-};
+  // Check if property name clashes with already added.
+  // Object/class getters and setters are not allowed to clash —
+  // either with each other or with an init property — and in
+  // strict mode, init properties are also not allowed to be repeated.
 
-// A recursive descent parser operates by defining functions for all
-// syntactic elements, and recursively calling those, each function
-// advancing the input stream and returning an AST node. Precedence
-// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
-// instead of `(!x)[1]` is handled by the fact that the parser
-// function that parses unary prefix operators is called first, and
-// in turn calls the function that parses `[]` subscripts — that
-// way, it'll receive the node for `x[1]` already parsed, and wraps
-// *that* in the unary operator node.
-//
-// Acorn uses an [operator precedence parser][opp] to handle binary
-// operator precedence, because it is much more compact than using
-// the technique outlined above, which uses different, nesting
-// functions to specify precedence, for all of the ten binary
-// precedence levels that JavaScript defines.
-//
-// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
-
-var pp$3 = Parser.prototype;
-
-// Check if property name clashes with already added.
-// Object/class getters and setters are not allowed to clash —
-// either with each other or with an init property — and in
-// strict mode, init properties are also not allowed to be repeated.
-
-pp$3.checkPropClash = function(prop, propHash, refDestructuringErrors) {
-  if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement")
-    { return }
-  if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
-    { return }
-  var key = prop.key;
-  var name;
-  switch (key.type) {
-  case "Identifier": name = key.name; break
-  case "Literal": name = String(key.value); break
-  default: return
-  }
-  var kind = prop.kind;
-  if (this.options.ecmaVersion >= 6) {
-    if (name === "__proto__" && kind === "init") {
-      if (propHash.proto) {
-        if (refDestructuringErrors && refDestructuringErrors.doubleProto < 0) { refDestructuringErrors.doubleProto = key.start; }
-        // Backwards-compat kludge. Can be removed in version 6.0
-        else { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); }
+  pp$3.checkPropClash = function(prop, propHash, refDestructuringErrors) {
+    if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement")
+      { return }
+    if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
+      { return }
+    var key = prop.key;
+    var name;
+    switch (key.type) {
+    case "Identifier": name = key.name; break
+    case "Literal": name = String(key.value); break
+    default: return
+    }
+    var kind = prop.kind;
+    if (this.options.ecmaVersion >= 6) {
+      if (name === "__proto__" && kind === "init") {
+        if (propHash.proto) {
+          if (refDestructuringErrors) {
+            if (refDestructuringErrors.doubleProto < 0)
+              { refDestructuringErrors.doubleProto = key.start; }
+            // Backwards-compat kludge. Can be removed in version 6.0
+          } else { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); }
+        }
+        propHash.proto = true;
       }
-      propHash.proto = true;
+      return
     }
-    return
-  }
-  name = "$" + name;
-  var other = propHash[name];
-  if (other) {
-    var redefinition;
-    if (kind === "init") {
-      redefinition = this.strict && other.init || other.get || other.set;
+    name = "$" + name;
+    var other = propHash[name];
+    if (other) {
+      var redefinition;
+      if (kind === "init") {
+        redefinition = this.strict && other.init || other.get || other.set;
+      } else {
+        redefinition = other.init || other[kind];
+      }
+      if (redefinition)
+        { this.raiseRecoverable(key.start, "Redefinition of property"); }
     } else {
-      redefinition = other.init || other[kind];
-    }
-    if (redefinition)
-      { this.raiseRecoverable(key.start, "Redefinition of property"); }
-  } else {
-    other = propHash[name] = {
-      init: false,
-      get: false,
-      set: false
-    };
-  }
-  other[kind] = true;
-};
-
-// ### Expression parsing
+      other = propHash[name] = {
+        init: false,
+        get: false,
+        set: false
+      };
+    }
+    other[kind] = true;
+  };
 
-// These nest, from the most general expression type at the top to
-// 'atomic', nondivisible expression types at the bottom. Most of
-// the functions will simply let the function(s) below them parse,
-// and, *if* the syntactic construct they handle is present, wrap
-// the AST node that the inner parser gave them in another node.
+  // ### Expression parsing
+
+  // These nest, from the most general expression type at the top to
+  // 'atomic', nondivisible expression types at the bottom. Most of
+  // the functions will simply let the function(s) below them parse,
+  // and, *if* the syntactic construct they handle is present, wrap
+  // the AST node that the inner parser gave them in another node.
+
+  // Parse a full expression. The optional arguments are used to
+  // forbid the `in` operator (in for loops initalization expressions)
+  // and provide reference for storing '=' operator inside shorthand
+  // property assignment in contexts where both object expression
+  // and object pattern might appear (so it's possible to raise
+  // delayed syntax error at correct position).
+
+  pp$3.parseExpression = function(noIn, refDestructuringErrors) {
+    var startPos = this.start, startLoc = this.startLoc;
+    var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
+    if (this.type === types.comma) {
+      var node = this.startNodeAt(startPos, startLoc);
+      node.expressions = [expr];
+      while (this.eat(types.comma)) { node.expressions.push(this.parseMaybeAssign(noIn, refDestructuringErrors)); }
+      return this.finishNode(node, "SequenceExpression")
+    }
+    return expr
+  };
 
-// Parse a full expression. The optional arguments are used to
-// forbid the `in` operator (in for loops initalization expressions)
-// and provide reference for storing '=' operator inside shorthand
-// property assignment in contexts where both object expression
-// and object pattern might appear (so it's possible to raise
-// delayed syntax error at correct position).
+  // Parse an assignment expression. This includes applications of
+  // operators like `+=`.
 
-pp$3.parseExpression = function(noIn, refDestructuringErrors) {
-  var this$1 = this;
+  pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
+    if (this.isContextual("yield")) {
+      if (this.inGenerator) { return this.parseYield(noIn) }
+      // The tokenizer will assume an expression is allowed after
+      // `yield`, but this isn't that kind of yield
+      else { this.exprAllowed = false; }
+    }
 
-  var startPos = this.start, startLoc = this.startLoc;
-  var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
-  if (this.type === types.comma) {
-    var node = this.startNodeAt(startPos, startLoc);
-    node.expressions = [expr];
-    while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); }
-    return this.finishNode(node, "SequenceExpression")
-  }
-  return expr
-};
+    var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1;
+    if (refDestructuringErrors) {
+      oldParenAssign = refDestructuringErrors.parenthesizedAssign;
+      oldTrailingComma = refDestructuringErrors.trailingComma;
+      refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1;
+    } else {
+      refDestructuringErrors = new DestructuringErrors;
+      ownDestructuringErrors = true;
+    }
+
+    var startPos = this.start, startLoc = this.startLoc;
+    if (this.type === types.parenL || this.type === types.name)
+      { this.potentialArrowAt = this.start; }
+    var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
+    if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
+    if (this.type.isAssign) {
+      var node = this.startNodeAt(startPos, startLoc);
+      node.operator = this.value;
+      node.left = this.type === types.eq ? this.toAssignable(left, false, refDestructuringErrors) : left;
+      if (!ownDestructuringErrors) {
+        refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = refDestructuringErrors.doubleProto = -1;
+      }
+      if (refDestructuringErrors.shorthandAssign >= node.left.start)
+        { refDestructuringErrors.shorthandAssign = -1; } // reset because shorthand default was used correctly
+      this.checkLVal(left);
+      this.next();
+      node.right = this.parseMaybeAssign(noIn);
+      return this.finishNode(node, "AssignmentExpression")
+    } else {
+      if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
+    }
+    if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
+    if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
+    return left
+  };
 
-// Parse an assignment expression. This includes applications of
-// operators like `+=`.
+  // Parse a ternary conditional (`?:`) operator.
 
-pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
-  if (this.isContextual("yield")) {
-    if (this.inGenerator) { return this.parseYield(noIn) }
-    // The tokenizer will assume an expression is allowed after
-    // `yield`, but this isn't that kind of yield
-    else { this.exprAllowed = false; }
-  }
+  pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
+    var startPos = this.start, startLoc = this.startLoc;
+    var expr = this.parseExprOps(noIn, refDestructuringErrors);
+    if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
+    if (this.eat(types.question)) {
+      var node = this.startNodeAt(startPos, startLoc);
+      node.test = expr;
+      node.consequent = this.parseMaybeAssign();
+      this.expect(types.colon);
+      node.alternate = this.parseMaybeAssign(noIn);
+      return this.finishNode(node, "ConditionalExpression")
+    }
+    return expr
+  };
 
-  var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1, oldShorthandAssign = -1;
-  if (refDestructuringErrors) {
-    oldParenAssign = refDestructuringErrors.parenthesizedAssign;
-    oldTrailingComma = refDestructuringErrors.trailingComma;
-    oldShorthandAssign = refDestructuringErrors.shorthandAssign;
-    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = refDestructuringErrors.shorthandAssign = -1;
-  } else {
-    refDestructuringErrors = new DestructuringErrors;
-    ownDestructuringErrors = true;
-  }
+  // Start the precedence parser.
 
-  var startPos = this.start, startLoc = this.startLoc;
-  if (this.type === types.parenL || this.type === types.name)
-    { this.potentialArrowAt = this.start; }
-  var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
-  if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
-  if (this.type.isAssign) {
-    var node = this.startNodeAt(startPos, startLoc);
-    node.operator = this.value;
-    node.left = this.type === types.eq ? this.toAssignable(left, false, refDestructuringErrors) : left;
-    if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); }
-    refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly
-    this.checkLVal(left);
-    this.next();
-    node.right = this.parseMaybeAssign(noIn);
-    return this.finishNode(node, "AssignmentExpression")
-  } else {
-    if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
-  }
-  if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
-  if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
-  if (oldShorthandAssign > -1) { refDestructuringErrors.shorthandAssign = oldShorthandAssign; }
-  return left
-};
+  pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
+    var startPos = this.start, startLoc = this.startLoc;
+    var expr = this.parseMaybeUnary(refDestructuringErrors, false);
+    if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
+    return expr.start === startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
+  };
 
-// Parse a ternary conditional (`?:`) operator.
+  // Parse binary operators with the operator precedence parsing
+  // algorithm. `left` is the left-hand side of the operator.
+  // `minPrec` provides context that allows the function to stop and
+  // defer further parser to one of its callers when it encounters an
+  // operator that has a lower precedence than the set it is parsing.
+
+  pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
+    var prec = this.type.binop;
+    if (prec != null && (!noIn || this.type !== types._in)) {
+      if (prec > minPrec) {
+        var logical = this.type === types.logicalOR || this.type === types.logicalAND;
+        var op = this.value;
+        this.next();
+        var startPos = this.start, startLoc = this.startLoc;
+        var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
+        var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
+        return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
+      }
+    }
+    return left
+  };
 
-pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc;
-  var expr = this.parseExprOps(noIn, refDestructuringErrors);
-  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
-  if (this.eat(types.question)) {
+  pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
     var node = this.startNodeAt(startPos, startLoc);
-    node.test = expr;
-    node.consequent = this.parseMaybeAssign();
-    this.expect(types.colon);
-    node.alternate = this.parseMaybeAssign(noIn);
-    return this.finishNode(node, "ConditionalExpression")
-  }
-  return expr
-};
-
-// Start the precedence parser.
-
-pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc;
-  var expr = this.parseMaybeUnary(refDestructuringErrors, false);
-  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
-  return expr.start === startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
-};
+    node.left = left;
+    node.operator = op;
+    node.right = right;
+    return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
+  };
 
-// Parse binary operators with the operator precedence parsing
-// algorithm. `left` is the left-hand side of the operator.
-// `minPrec` provides context that allows the function to stop and
-// defer further parser to one of its callers when it encounters an
-// operator that has a lower precedence than the set it is parsing.
-
-pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
-  var prec = this.type.binop;
-  if (prec != null && (!noIn || this.type !== types._in)) {
-    if (prec > minPrec) {
-      var logical = this.type === types.logicalOR || this.type === types.logicalAND;
-      var op = this.value;
+  // Parse unary operators, both prefix and postfix.
+
+  pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
+    var startPos = this.start, startLoc = this.startLoc, expr;
+    if (this.isContextual("await") && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))) {
+      expr = this.parseAwait();
+      sawUnary = true;
+    } else if (this.type.prefix) {
+      var node = this.startNode(), update = this.type === types.incDec;
+      node.operator = this.value;
+      node.prefix = true;
       this.next();
-      var startPos = this.start, startLoc = this.startLoc;
-      var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
-      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
-      return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
+      node.argument = this.parseMaybeUnary(null, true);
+      this.checkExpressionErrors(refDestructuringErrors, true);
+      if (update) { this.checkLVal(node.argument); }
+      else if (this.strict && node.operator === "delete" &&
+               node.argument.type === "Identifier")
+        { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
+      else { sawUnary = true; }
+      expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
+    } else {
+      expr = this.parseExprSubscripts(refDestructuringErrors);
+      if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
+      while (this.type.postfix && !this.canInsertSemicolon()) {
+        var node$1 = this.startNodeAt(startPos, startLoc);
+        node$1.operator = this.value;
+        node$1.prefix = false;
+        node$1.argument = expr;
+        this.checkLVal(expr);
+        this.next();
+        expr = this.finishNode(node$1, "UpdateExpression");
+      }
     }
-  }
-  return left
-};
 
-pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
-  var node = this.startNodeAt(startPos, startLoc);
-  node.left = left;
-  node.operator = op;
-  node.right = right;
-  return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
-};
+    if (!sawUnary && this.eat(types.starstar))
+      { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) }
+    else
+      { return expr }
+  };
 
-// Parse unary operators, both prefix and postfix.
+  // Parse call, dot, and `[]`-subscript expressions.
 
-pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
-  var this$1 = this;
+  pp$3.parseExprSubscripts = function(refDestructuringErrors) {
+    var startPos = this.start, startLoc = this.startLoc;
+    var expr = this.parseExprAtom(refDestructuringErrors);
+    if (expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")")
+      { return expr }
+    var result = this.parseSubscripts(expr, startPos, startLoc);
+    if (refDestructuringErrors && result.type === "MemberExpression") {
+      if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
+      if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
+    }
+    return result
+  };
 
-  var startPos = this.start, startLoc = this.startLoc, expr;
-  if (this.isContextual("await") && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))) {
-    expr = this.parseAwait();
-    sawUnary = true;
-  } else if (this.type.prefix) {
-    var node = this.startNode(), update = this.type === types.incDec;
-    node.operator = this.value;
-    node.prefix = true;
-    this.next();
-    node.argument = this.parseMaybeUnary(null, true);
-    this.checkExpressionErrors(refDestructuringErrors, true);
-    if (update) { this.checkLVal(node.argument); }
-    else if (this.strict && node.operator === "delete" &&
-             node.argument.type === "Identifier")
-      { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
-    else { sawUnary = true; }
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
-  } else {
-    expr = this.parseExprSubscripts(refDestructuringErrors);
-    if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
-    while (this.type.postfix && !this.canInsertSemicolon()) {
-      var node$1 = this$1.startNodeAt(startPos, startLoc);
-      node$1.operator = this$1.value;
-      node$1.prefix = false;
-      node$1.argument = expr;
-      this$1.checkLVal(expr);
-      this$1.next();
-      expr = this$1.finishNode(node$1, "UpdateExpression");
+  pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
+    var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
+        this.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async";
+    while (true) {
+      var element = this.parseSubscript(base, startPos, startLoc, noCalls, maybeAsyncArrow);
+      if (element === base || element.type === "ArrowFunctionExpression") { return element }
+      base = element;
     }
-  }
+  };
 
-  if (!sawUnary && this.eat(types.starstar))
-    { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) }
-  else
-    { return expr }
-};
+  pp$3.parseSubscript = function(base, startPos, startLoc, noCalls, maybeAsyncArrow) {
+    var computed = this.eat(types.bracketL);
+    if (computed || this.eat(types.dot)) {
+      var node = this.startNodeAt(startPos, startLoc);
+      node.object = base;
+      node.property = computed ? this.parseExpression() : this.parseIdent(this.options.allowReserved !== "never");
+      node.computed = !!computed;
+      if (computed) { this.expect(types.bracketR); }
+      base = this.finishNode(node, "MemberExpression");
+    } else if (!noCalls && this.eat(types.parenL)) {
+      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
+      this.yieldPos = 0;
+      this.awaitPos = 0;
+      this.awaitIdentPos = 0;
+      var exprList = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false, refDestructuringErrors);
+      if (maybeAsyncArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
+        this.checkPatternErrors(refDestructuringErrors, false);
+        this.checkYieldAwaitInDefaultParams();
+        if (this.awaitIdentPos > 0)
+          { this.raise(this.awaitIdentPos, "Cannot use 'await' as identifier inside an async function"); }
+        this.yieldPos = oldYieldPos;
+        this.awaitPos = oldAwaitPos;
+        this.awaitIdentPos = oldAwaitIdentPos;
+        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, true)
+      }
+      this.checkExpressionErrors(refDestructuringErrors, true);
+      this.yieldPos = oldYieldPos || this.yieldPos;
+      this.awaitPos = oldAwaitPos || this.awaitPos;
+      this.awaitIdentPos = oldAwaitIdentPos || this.awaitIdentPos;
+      var node$1 = this.startNodeAt(startPos, startLoc);
+      node$1.callee = base;
+      node$1.arguments = exprList;
+      base = this.finishNode(node$1, "CallExpression");
+    } else if (this.type === types.backQuote) {
+      var node$2 = this.startNodeAt(startPos, startLoc);
+      node$2.tag = base;
+      node$2.quasi = this.parseTemplate({isTagged: true});
+      base = this.finishNode(node$2, "TaggedTemplateExpression");
+    }
+    return base
+  };
 
-// Parse call, dot, and `[]`-subscript expressions.
-
-pp$3.parseExprSubscripts = function(refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc;
-  var expr = this.parseExprAtom(refDestructuringErrors);
-  var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
-  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr }
-  var result = this.parseSubscripts(expr, startPos, startLoc);
-  if (refDestructuringErrors && result.type === "MemberExpression") {
-    if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
-    if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
-  }
-  return result
-};
+  // Parse an atomic expression — either a single token that is an
+  // expression, an expression started by a keyword like `function` or
+  // `new`, or an expression wrapped in punctuation like `()`, `[]`,
+  // or `{}`.
 
-pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
-  var this$1 = this;
+  pp$3.parseExprAtom = function(refDestructuringErrors) {
+    // If a division operator appears in an expression position, the
+    // tokenizer got confused, and we force it to read a regexp instead.
+    if (this.type === types.slash) { this.readRegexp(); }
 
-  var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
-      this.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async";
-  while (true) {
-    var element = this$1.parseSubscript(base, startPos, startLoc, noCalls, maybeAsyncArrow);
-    if (element === base || element.type === "ArrowFunctionExpression") { return element }
-    base = element;
-  }
-};
+    var node, canBeArrow = this.potentialArrowAt === this.start;
+    switch (this.type) {
+    case types._super:
+      if (!this.allowSuper)
+        { this.raise(this.start, "'super' keyword outside a method"); }
+      node = this.startNode();
+      this.next();
+      if (this.type === types.parenL && !this.allowDirectSuper)
+        { this.raise(node.start, "super() call outside constructor of a subclass"); }
+      // The `super` keyword can appear at below:
+      // SuperProperty:
+      //     super [ Expression ]
+      //     super . IdentifierName
+      // SuperCall:
+      //     super ( Arguments )
+      if (this.type !== types.dot && this.type !== types.bracketL && this.type !== types.parenL)
+        { this.unexpected(); }
+      return this.finishNode(node, "Super")
+
+    case types._this:
+      node = this.startNode();
+      this.next();
+      return this.finishNode(node, "ThisExpression")
+
+    case types.name:
+      var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc;
+      var id = this.parseIdent(false);
+      if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
+        { return this.parseFunction(this.startNodeAt(startPos, startLoc), 0, false, true) }
+      if (canBeArrow && !this.canInsertSemicolon()) {
+        if (this.eat(types.arrow))
+          { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) }
+        if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name && !containsEsc) {
+          id = this.parseIdent(false);
+          if (this.canInsertSemicolon() || !this.eat(types.arrow))
+            { this.unexpected(); }
+          return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
+        }
+      }
+      return id
 
-pp$3.parseSubscript = function(base, startPos, startLoc, noCalls, maybeAsyncArrow) {
-  var computed = this.eat(types.bracketL);
-  if (computed || this.eat(types.dot)) {
-    var node = this.startNodeAt(startPos, startLoc);
-    node.object = base;
-    node.property = computed ? this.parseExpression() : this.parseIdent(true);
-    node.computed = !!computed;
-    if (computed) { this.expect(types.bracketR); }
-    base = this.finishNode(node, "MemberExpression");
-  } else if (!noCalls && this.eat(types.parenL)) {
-    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
-    this.yieldPos = 0;
-    this.awaitPos = 0;
-    this.awaitIdentPos = 0;
-    var exprList = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false, refDestructuringErrors);
-    if (maybeAsyncArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
-      this.checkPatternErrors(refDestructuringErrors, false);
-      this.checkYieldAwaitInDefaultParams();
-      if (this.awaitIdentPos > 0)
-        { this.raise(this.awaitIdentPos, "Cannot use 'await' as identifier inside an async function"); }
-      this.yieldPos = oldYieldPos;
-      this.awaitPos = oldAwaitPos;
-      this.awaitIdentPos = oldAwaitIdentPos;
-      return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, true)
-    }
-    this.checkExpressionErrors(refDestructuringErrors, true);
-    this.yieldPos = oldYieldPos || this.yieldPos;
-    this.awaitPos = oldAwaitPos || this.awaitPos;
-    this.awaitIdentPos = oldAwaitIdentPos || this.awaitIdentPos;
-    var node$1 = this.startNodeAt(startPos, startLoc);
-    node$1.callee = base;
-    node$1.arguments = exprList;
-    base = this.finishNode(node$1, "CallExpression");
-  } else if (this.type === types.backQuote) {
-    var node$2 = this.startNodeAt(startPos, startLoc);
-    node$2.tag = base;
-    node$2.quasi = this.parseTemplate({isTagged: true});
-    base = this.finishNode(node$2, "TaggedTemplateExpression");
-  }
-  return base
-};
+    case types.regexp:
+      var value = this.value;
+      node = this.parseLiteral(value.value);
+      node.regex = {pattern: value.pattern, flags: value.flags};
+      return node
 
-// Parse an atomic expression — either a single token that is an
-// expression, an expression started by a keyword like `function` or
-// `new`, or an expression wrapped in punctuation like `()`, `[]`,
-// or `{}`.
-
-pp$3.parseExprAtom = function(refDestructuringErrors) {
-  // If a division operator appears in an expression position, the
-  // tokenizer got confused, and we force it to read a regexp instead.
-  if (this.type === types.slash) { this.readRegexp(); }
-
-  var node, canBeArrow = this.potentialArrowAt === this.start;
-  switch (this.type) {
-  case types._super:
-    if (!this.allowSuper)
-      { this.raise(this.start, "'super' keyword outside a method"); }
-    node = this.startNode();
-    this.next();
-    if (this.type === types.parenL && !this.allowDirectSuper)
-      { this.raise(node.start, "super() call outside constructor of a subclass"); }
-    // The `super` keyword can appear at below:
-    // SuperProperty:
-    //     super [ Expression ]
-    //     super . IdentifierName
-    // SuperCall:
-    //     super Arguments
-    if (this.type !== types.dot && this.type !== types.bracketL && this.type !== types.parenL)
-      { this.unexpected(); }
-    return this.finishNode(node, "Super")
+    case types.num: case types.string:
+      return this.parseLiteral(this.value)
 
-  case types._this:
-    node = this.startNode();
-    this.next();
-    return this.finishNode(node, "ThisExpression")
-
-  case types.name:
-    var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc;
-    var id = this.parseIdent(false);
-    if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
-      { return this.parseFunction(this.startNodeAt(startPos, startLoc), 0, false, true) }
-    if (canBeArrow && !this.canInsertSemicolon()) {
-      if (this.eat(types.arrow))
-        { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) }
-      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name && !containsEsc) {
-        id = this.parseIdent(false);
-        if (this.canInsertSemicolon() || !this.eat(types.arrow))
-          { this.unexpected(); }
-        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
-      }
-    }
-    return id
-
-  case types.regexp:
-    var value = this.value;
-    node = this.parseLiteral(value.value);
-    node.regex = {pattern: value.pattern, flags: value.flags};
-    return node
+    case types._null: case types._true: case types._false:
+      node = this.startNode();
+      node.value = this.type === types._null ? null : this.type === types._true;
+      node.raw = this.type.keyword;
+      this.next();
+      return this.finishNode(node, "Literal")
+
+    case types.parenL:
+      var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow);
+      if (refDestructuringErrors) {
+        if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
+          { refDestructuringErrors.parenthesizedAssign = start; }
+        if (refDestructuringErrors.parenthesizedBind < 0)
+          { refDestructuringErrors.parenthesizedBind = start; }
+      }
+      return expr
 
-  case types.num: case types.string:
-    return this.parseLiteral(this.value)
+    case types.bracketL:
+      node = this.startNode();
+      this.next();
+      node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
+      return this.finishNode(node, "ArrayExpression")
 
-  case types._null: case types._true: case types._false:
-    node = this.startNode();
-    node.value = this.type === types._null ? null : this.type === types._true;
-    node.raw = this.type.keyword;
-    this.next();
-    return this.finishNode(node, "Literal")
+    case types.braceL:
+      return this.parseObj(false, refDestructuringErrors)
 
-  case types.parenL:
-    var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow);
-    if (refDestructuringErrors) {
-      if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
-        { refDestructuringErrors.parenthesizedAssign = start; }
-      if (refDestructuringErrors.parenthesizedBind < 0)
-        { refDestructuringErrors.parenthesizedBind = start; }
-    }
-    return expr
+    case types._function:
+      node = this.startNode();
+      this.next();
+      return this.parseFunction(node, 0)
 
-  case types.bracketL:
-    node = this.startNode();
-    this.next();
-    node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
-    return this.finishNode(node, "ArrayExpression")
+    case types._class:
+      return this.parseClass(this.startNode(), false)
 
-  case types.braceL:
-    return this.parseObj(false, refDestructuringErrors)
+    case types._new:
+      return this.parseNew()
 
-  case types._function:
-    node = this.startNode();
-    this.next();
-    return this.parseFunction(node, 0)
+    case types.backQuote:
+      return this.parseTemplate()
 
-  case types._class:
-    return this.parseClass(this.startNode(), false)
+    case types._import:
+      if (this.options.ecmaVersion >= 11) {
+        return this.parseExprImport()
+      } else {
+        return this.unexpected()
+      }
 
-  case types._new:
-    return this.parseNew()
+    default:
+      this.unexpected();
+    }
+  };
 
-  case types.backQuote:
-    return this.parseTemplate()
+  pp$3.parseExprImport = function() {
+    var node = this.startNode();
+    this.next(); // skip `import`
+    switch (this.type) {
+    case types.parenL:
+      return this.parseDynamicImport(node)
+    default:
+      this.unexpected();
+    }
+  };
 
-  default:
-    this.unexpected();
-  }
-};
+  pp$3.parseDynamicImport = function(node) {
+    this.next(); // skip `(`
 
-pp$3.parseLiteral = function(value) {
-  var node = this.startNode();
-  node.value = value;
-  node.raw = this.input.slice(this.start, this.end);
-  this.next();
-  return this.finishNode(node, "Literal")
-};
+    // Parse node.source.
+    node.source = this.parseMaybeAssign();
 
-pp$3.parseParenExpression = function() {
-  this.expect(types.parenL);
-  var val = this.parseExpression();
-  this.expect(types.parenR);
-  return val
-};
+    // Verify ending.
+    if (!this.eat(types.parenR)) {
+      var errorPos = this.start;
+      if (this.eat(types.comma) && this.eat(types.parenR)) {
+        this.raiseRecoverable(errorPos, "Trailing comma is not allowed in import()");
+      } else {
+        this.unexpected(errorPos);
+      }
+    }
 
-pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
-  var this$1 = this;
+    return this.finishNode(node, "ImportExpression")
+  };
 
-  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
-  if (this.options.ecmaVersion >= 6) {
+  pp$3.parseLiteral = function(value) {
+    var node = this.startNode();
+    node.value = value;
+    node.raw = this.input.slice(this.start, this.end);
+    if (node.raw.charCodeAt(node.raw.length - 1) === 110) { node.bigint = node.raw.slice(0, -1); }
     this.next();
+    return this.finishNode(node, "Literal")
+  };
 
-    var innerStartPos = this.start, innerStartLoc = this.startLoc;
-    var exprList = [], first = true, lastIsComma = false;
-    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart;
-    this.yieldPos = 0;
-    this.awaitPos = 0;
-    // Do not save awaitIdentPos to allow checking awaits nested in parameters
-    while (this.type !== types.parenR) {
-      first ? first = false : this$1.expect(types.comma);
-      if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) {
-        lastIsComma = true;
-        break
-      } else if (this$1.type === types.ellipsis) {
-        spreadStart = this$1.start;
-        exprList.push(this$1.parseParenItem(this$1.parseRestBinding()));
-        if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
-        break
-      } else {
-        exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
-      }
-    }
-    var innerEndPos = this.start, innerEndLoc = this.startLoc;
+  pp$3.parseParenExpression = function() {
+    this.expect(types.parenL);
+    var val = this.parseExpression();
     this.expect(types.parenR);
+    return val
+  };
 
-    if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
-      this.checkPatternErrors(refDestructuringErrors, false);
-      this.checkYieldAwaitInDefaultParams();
-      this.yieldPos = oldYieldPos;
-      this.awaitPos = oldAwaitPos;
-      return this.parseParenArrowList(startPos, startLoc, exprList)
-    }
+  pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
+    var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
+    if (this.options.ecmaVersion >= 6) {
+      this.next();
+
+      var innerStartPos = this.start, innerStartLoc = this.startLoc;
+      var exprList = [], first = true, lastIsComma = false;
+      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart;
+      this.yieldPos = 0;
+      this.awaitPos = 0;
+      // Do not save awaitIdentPos to allow checking awaits nested in parameters
+      while (this.type !== types.parenR) {
+        first ? first = false : this.expect(types.comma);
+        if (allowTrailingComma && this.afterTrailingComma(types.parenR, true)) {
+          lastIsComma = true;
+          break
+        } else if (this.type === types.ellipsis) {
+          spreadStart = this.start;
+          exprList.push(this.parseParenItem(this.parseRestBinding()));
+          if (this.type === types.comma) { this.raise(this.start, "Comma is not permitted after the rest element"); }
+          break
+        } else {
+          exprList.push(this.parseMaybeAssign(false, refDestructuringErrors, this.parseParenItem));
+        }
+      }
+      var innerEndPos = this.start, innerEndLoc = this.startLoc;
+      this.expect(types.parenR);
 
-    if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
-    if (spreadStart) { this.unexpected(spreadStart); }
-    this.checkExpressionErrors(refDestructuringErrors, true);
-    this.yieldPos = oldYieldPos || this.yieldPos;
-    this.awaitPos = oldAwaitPos || this.awaitPos;
+      if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
+        this.checkPatternErrors(refDestructuringErrors, false);
+        this.checkYieldAwaitInDefaultParams();
+        this.yieldPos = oldYieldPos;
+        this.awaitPos = oldAwaitPos;
+        return this.parseParenArrowList(startPos, startLoc, exprList)
+      }
 
-    if (exprList.length > 1) {
-      val = this.startNodeAt(innerStartPos, innerStartLoc);
-      val.expressions = exprList;
-      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
+      if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
+      if (spreadStart) { this.unexpected(spreadStart); }
+      this.checkExpressionErrors(refDestructuringErrors, true);
+      this.yieldPos = oldYieldPos || this.yieldPos;
+      this.awaitPos = oldAwaitPos || this.awaitPos;
+
+      if (exprList.length > 1) {
+        val = this.startNodeAt(innerStartPos, innerStartLoc);
+        val.expressions = exprList;
+        this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
+      } else {
+        val = exprList[0];
+      }
     } else {
-      val = exprList[0];
+      val = this.parseParenExpression();
     }
-  } else {
-    val = this.parseParenExpression();
-  }
 
-  if (this.options.preserveParens) {
-    var par = this.startNodeAt(startPos, startLoc);
-    par.expression = val;
-    return this.finishNode(par, "ParenthesizedExpression")
-  } else {
-    return val
-  }
-};
+    if (this.options.preserveParens) {
+      var par = this.startNodeAt(startPos, startLoc);
+      par.expression = val;
+      return this.finishNode(par, "ParenthesizedExpression")
+    } else {
+      return val
+    }
+  };
 
-pp$3.parseParenItem = function(item) {
-  return item
-};
+  pp$3.parseParenItem = function(item) {
+    return item
+  };
 
-pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
-  return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
-};
+  pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
+    return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
+  };
 
-// New's precedence is slightly tricky. It must allow its argument to
-// be a `[]` or dot subscript expression, but not a call — at least,
-// not without wrapping it in parentheses. Thus, it uses the noCalls
-// argument to parseSubscripts to prevent it from consuming the
-// argument list.
+  // New's precedence is slightly tricky. It must allow its argument to
+  // be a `[]` or dot subscript expression, but not a call — at least,
+  // not without wrapping it in parentheses. Thus, it uses the noCalls
+  // argument to parseSubscripts to prevent it from consuming the
+  // argument list.
 
-var empty$1 = [];
+  var empty$1 = [];
 
-pp$3.parseNew = function() {
-  var node = this.startNode();
-  var meta = this.parseIdent(true);
-  if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
-    node.meta = meta;
-    var containsEsc = this.containsEsc;
-    node.property = this.parseIdent(true);
-    if (node.property.name !== "target" || containsEsc)
-      { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); }
-    if (!this.inNonArrowFunction())
-      { this.raiseRecoverable(node.start, "new.target can only be used in functions"); }
-    return this.finishNode(node, "MetaProperty")
-  }
-  var startPos = this.start, startLoc = this.startLoc;
-  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
-  if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); }
-  else { node.arguments = empty$1; }
-  return this.finishNode(node, "NewExpression")
-};
+  pp$3.parseNew = function() {
+    if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword new"); }
+    var node = this.startNode();
+    var meta = this.parseIdent(true);
+    if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
+      node.meta = meta;
+      var containsEsc = this.containsEsc;
+      node.property = this.parseIdent(true);
+      if (node.property.name !== "target" || containsEsc)
+        { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); }
+      if (!this.inNonArrowFunction())
+        { this.raiseRecoverable(node.start, "new.target can only be used in functions"); }
+      return this.finishNode(node, "MetaProperty")
+    }
+    var startPos = this.start, startLoc = this.startLoc, isImport = this.type === types._import;
+    node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
+    if (isImport && node.callee.type === "ImportExpression") {
+      this.raise(startPos, "Cannot use new with import()");
+    }
+    if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); }
+    else { node.arguments = empty$1; }
+    return this.finishNode(node, "NewExpression")
+  };
 
-// Parse template expression.
+  // Parse template expression.
 
-pp$3.parseTemplateElement = function(ref) {
-  var isTagged = ref.isTagged;
+  pp$3.parseTemplateElement = function(ref) {
+    var isTagged = ref.isTagged;
 
-  var elem = this.startNode();
-  if (this.type === types.invalidTemplate) {
-    if (!isTagged) {
-      this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
+    var elem = this.startNode();
+    if (this.type === types.invalidTemplate) {
+      if (!isTagged) {
+        this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
+      }
+      elem.value = {
+        raw: this.value,
+        cooked: null
+      };
+    } else {
+      elem.value = {
+        raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
+        cooked: this.value
+      };
     }
-    elem.value = {
-      raw: this.value,
-      cooked: null
-    };
-  } else {
-    elem.value = {
-      raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
-      cooked: this.value
-    };
-  }
-  this.next();
-  elem.tail = this.type === types.backQuote;
-  return this.finishNode(elem, "TemplateElement")
-};
+    this.next();
+    elem.tail = this.type === types.backQuote;
+    return this.finishNode(elem, "TemplateElement")
+  };
 
-pp$3.parseTemplate = function(ref) {
-  var this$1 = this;
-  if ( ref === void 0 ) ref = {};
-  var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;
-
-  var node = this.startNode();
-  this.next();
-  node.expressions = [];
-  var curElt = this.parseTemplateElement({isTagged: isTagged});
-  node.quasis = [curElt];
-  while (!curElt.tail) {
-    if (this$1.type === types.eof) { this$1.raise(this$1.pos, "Unterminated template literal"); }
-    this$1.expect(types.dollarBraceL);
-    node.expressions.push(this$1.parseExpression());
-    this$1.expect(types.braceR);
-    node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged}));
-  }
-  this.next();
-  return this.finishNode(node, "TemplateLiteral")
-};
+  pp$3.parseTemplate = function(ref) {
+    if ( ref === void 0 ) ref = {};
+    var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;
 
-pp$3.isAsyncProp = function(prop) {
-  return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
-    (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === types.star)) &&
-    !lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-};
+    var node = this.startNode();
+    this.next();
+    node.expressions = [];
+    var curElt = this.parseTemplateElement({isTagged: isTagged});
+    node.quasis = [curElt];
+    while (!curElt.tail) {
+      if (this.type === types.eof) { this.raise(this.pos, "Unterminated template literal"); }
+      this.expect(types.dollarBraceL);
+      node.expressions.push(this.parseExpression());
+      this.expect(types.braceR);
+      node.quasis.push(curElt = this.parseTemplateElement({isTagged: isTagged}));
+    }
+    this.next();
+    return this.finishNode(node, "TemplateLiteral")
+  };
 
-// Parse an object literal or binding pattern.
+  pp$3.isAsyncProp = function(prop) {
+    return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
+      (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === types.star)) &&
+      !lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+  };
 
-pp$3.parseObj = function(isPattern, refDestructuringErrors) {
-  var this$1 = this;
+  // Parse an object literal or binding pattern.
 
-  var node = this.startNode(), first = true, propHash = {};
-  node.properties = [];
-  this.next();
-  while (!this.eat(types.braceR)) {
-    if (!first) {
-      this$1.expect(types.comma);
-      if (this$1.afterTrailingComma(types.braceR)) { break }
-    } else { first = false; }
+  pp$3.parseObj = function(isPattern, refDestructuringErrors) {
+    var node = this.startNode(), first = true, propHash = {};
+    node.properties = [];
+    this.next();
+    while (!this.eat(types.braceR)) {
+      if (!first) {
+        this.expect(types.comma);
+        if (this.options.ecmaVersion >= 5 && this.afterTrailingComma(types.braceR)) { break }
+      } else { first = false; }
 
-    var prop = this$1.parseProperty(isPattern, refDestructuringErrors);
-    if (!isPattern) { this$1.checkPropClash(prop, propHash, refDestructuringErrors); }
-    node.properties.push(prop);
-  }
-  return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
-};
+      var prop = this.parseProperty(isPattern, refDestructuringErrors);
+      if (!isPattern) { this.checkPropClash(prop, propHash, refDestructuringErrors); }
+      node.properties.push(prop);
+    }
+    return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
+  };
 
-pp$3.parseProperty = function(isPattern, refDestructuringErrors) {
-  var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc;
-  if (this.options.ecmaVersion >= 9 && this.eat(types.ellipsis)) {
-    if (isPattern) {
-      prop.argument = this.parseIdent(false);
-      if (this.type === types.comma) {
-        this.raise(this.start, "Comma is not permitted after the rest element");
+  pp$3.parseProperty = function(isPattern, refDestructuringErrors) {
+    var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc;
+    if (this.options.ecmaVersion >= 9 && this.eat(types.ellipsis)) {
+      if (isPattern) {
+        prop.argument = this.parseIdent(false);
+        if (this.type === types.comma) {
+          this.raise(this.start, "Comma is not permitted after the rest element");
+        }
+        return this.finishNode(prop, "RestElement")
       }
-      return this.finishNode(prop, "RestElement")
-    }
-    // To disallow parenthesized identifier via `this.toAssignable()`.
-    if (this.type === types.parenL && refDestructuringErrors) {
-      if (refDestructuringErrors.parenthesizedAssign < 0) {
-        refDestructuringErrors.parenthesizedAssign = this.start;
+      // To disallow parenthesized identifier via `this.toAssignable()`.
+      if (this.type === types.parenL && refDestructuringErrors) {
+        if (refDestructuringErrors.parenthesizedAssign < 0) {
+          refDestructuringErrors.parenthesizedAssign = this.start;
+        }
+        if (refDestructuringErrors.parenthesizedBind < 0) {
+          refDestructuringErrors.parenthesizedBind = this.start;
+        }
       }
-      if (refDestructuringErrors.parenthesizedBind < 0) {
-        refDestructuringErrors.parenthesizedBind = this.start;
+      // Parse argument.
+      prop.argument = this.parseMaybeAssign(false, refDestructuringErrors);
+      // To disallow trailing comma via `this.toAssignable()`.
+      if (this.type === types.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
+        refDestructuringErrors.trailingComma = this.start;
       }
+      // Finish
+      return this.finishNode(prop, "SpreadElement")
     }
-    // Parse argument.
-    prop.argument = this.parseMaybeAssign(false, refDestructuringErrors);
-    // To disallow trailing comma via `this.toAssignable()`.
-    if (this.type === types.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
-      refDestructuringErrors.trailingComma = this.start;
+    if (this.options.ecmaVersion >= 6) {
+      prop.method = false;
+      prop.shorthand = false;
+      if (isPattern || refDestructuringErrors) {
+        startPos = this.start;
+        startLoc = this.startLoc;
+      }
+      if (!isPattern)
+        { isGenerator = this.eat(types.star); }
     }
-    // Finish
-    return this.finishNode(prop, "SpreadElement")
-  }
-  if (this.options.ecmaVersion >= 6) {
-    prop.method = false;
-    prop.shorthand = false;
-    if (isPattern || refDestructuringErrors) {
-      startPos = this.start;
-      startLoc = this.startLoc;
-    }
-    if (!isPattern)
-      { isGenerator = this.eat(types.star); }
-  }
-  var containsEsc = this.containsEsc;
-  this.parsePropertyName(prop);
-  if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {
-    isAsync = true;
-    isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
-    this.parsePropertyName(prop, refDestructuringErrors);
-  } else {
-    isAsync = false;
-  }
-  this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc);
-  return this.finishNode(prop, "Property")
-};
-
-pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) {
-  if ((isGenerator || isAsync) && this.type === types.colon)
-    { this.unexpected(); }
-
-  if (this.eat(types.colon)) {
-    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
-    prop.kind = "init";
-  } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
-    if (isPattern) { this.unexpected(); }
-    prop.kind = "init";
-    prop.method = true;
-    prop.value = this.parseMethod(isGenerator, isAsync);
-  } else if (!isPattern && !containsEsc &&
-             this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
-             (prop.key.name === "get" || prop.key.name === "set") &&
-             (this.type !== types.comma && this.type !== types.braceR)) {
-    if (isGenerator || isAsync) { this.unexpected(); }
-    prop.kind = prop.key.name;
+    var containsEsc = this.containsEsc;
     this.parsePropertyName(prop);
-    prop.value = this.parseMethod(false);
-    var paramCount = prop.kind === "get" ? 0 : 1;
-    if (prop.value.params.length !== paramCount) {
-      var start = prop.value.start;
-      if (prop.kind === "get")
-        { this.raiseRecoverable(start, "getter should have no params"); }
-      else
-        { this.raiseRecoverable(start, "setter should have exactly one param"); }
-    } else {
-      if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
-        { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
-    }
-  } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
-    if (isGenerator || isAsync) { this.unexpected(); }
-    this.checkUnreserved(prop.key);
-    if (prop.key.name === "await" && !this.awaitIdentPos)
-      { this.awaitIdentPos = startPos; }
-    prop.kind = "init";
-    if (isPattern) {
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
-    } else if (this.type === types.eq && refDestructuringErrors) {
-      if (refDestructuringErrors.shorthandAssign < 0)
-        { refDestructuringErrors.shorthandAssign = this.start; }
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+    if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {
+      isAsync = true;
+      isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
+      this.parsePropertyName(prop, refDestructuringErrors);
     } else {
-      prop.value = prop.key;
+      isAsync = false;
     }
-    prop.shorthand = true;
-  } else { this.unexpected(); }
-};
+    this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc);
+    return this.finishNode(prop, "Property")
+  };
 
-pp$3.parsePropertyName = function(prop) {
-  if (this.options.ecmaVersion >= 6) {
-    if (this.eat(types.bracketL)) {
-      prop.computed = true;
-      prop.key = this.parseMaybeAssign();
-      this.expect(types.bracketR);
-      return prop.key
-    } else {
-      prop.computed = false;
+  pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) {
+    if ((isGenerator || isAsync) && this.type === types.colon)
+      { this.unexpected(); }
+
+    if (this.eat(types.colon)) {
+      prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
+      prop.kind = "init";
+    } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
+      if (isPattern) { this.unexpected(); }
+      prop.kind = "init";
+      prop.method = true;
+      prop.value = this.parseMethod(isGenerator, isAsync);
+    } else if (!isPattern && !containsEsc &&
+               this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
+               (prop.key.name === "get" || prop.key.name === "set") &&
+               (this.type !== types.comma && this.type !== types.braceR)) {
+      if (isGenerator || isAsync) { this.unexpected(); }
+      prop.kind = prop.key.name;
+      this.parsePropertyName(prop);
+      prop.value = this.parseMethod(false);
+      var paramCount = prop.kind === "get" ? 0 : 1;
+      if (prop.value.params.length !== paramCount) {
+        var start = prop.value.start;
+        if (prop.kind === "get")
+          { this.raiseRecoverable(start, "getter should have no params"); }
+        else
+          { this.raiseRecoverable(start, "setter should have exactly one param"); }
+      } else {
+        if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
+          { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
+      }
+    } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
+      if (isGenerator || isAsync) { this.unexpected(); }
+      this.checkUnreserved(prop.key);
+      if (prop.key.name === "await" && !this.awaitIdentPos)
+        { this.awaitIdentPos = startPos; }
+      prop.kind = "init";
+      if (isPattern) {
+        prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+      } else if (this.type === types.eq && refDestructuringErrors) {
+        if (refDestructuringErrors.shorthandAssign < 0)
+          { refDestructuringErrors.shorthandAssign = this.start; }
+        prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+      } else {
+        prop.value = prop.key;
+      }
+      prop.shorthand = true;
+    } else { this.unexpected(); }
+  };
+
+  pp$3.parsePropertyName = function(prop) {
+    if (this.options.ecmaVersion >= 6) {
+      if (this.eat(types.bracketL)) {
+        prop.computed = true;
+        prop.key = this.parseMaybeAssign();
+        this.expect(types.bracketR);
+        return prop.key
+      } else {
+        prop.computed = false;
+      }
     }
-  }
-  return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true)
-};
+    return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(this.options.allowReserved !== "never")
+  };
 
-// Initialize empty function node.
+  // Initialize empty function node.
 
-pp$3.initFunction = function(node) {
-  node.id = null;
-  if (this.options.ecmaVersion >= 6) { node.generator = node.expression = false; }
-  if (this.options.ecmaVersion >= 8) { node.async = false; }
-};
+  pp$3.initFunction = function(node) {
+    node.id = null;
+    if (this.options.ecmaVersion >= 6) { node.generator = node.expression = false; }
+    if (this.options.ecmaVersion >= 8) { node.async = false; }
+  };
 
-// Parse object or class method.
+  // Parse object or class method.
 
-pp$3.parseMethod = function(isGenerator, isAsync, allowDirectSuper) {
-  var node = this.startNode(), oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
+  pp$3.parseMethod = function(isGenerator, isAsync, allowDirectSuper) {
+    var node = this.startNode(), oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
 
-  this.initFunction(node);
-  if (this.options.ecmaVersion >= 6)
-    { node.generator = isGenerator; }
-  if (this.options.ecmaVersion >= 8)
-    { node.async = !!isAsync; }
+    this.initFunction(node);
+    if (this.options.ecmaVersion >= 6)
+      { node.generator = isGenerator; }
+    if (this.options.ecmaVersion >= 8)
+      { node.async = !!isAsync; }
 
-  this.yieldPos = 0;
-  this.awaitPos = 0;
-  this.awaitIdentPos = 0;
-  this.enterScope(functionFlags(isAsync, node.generator) | SCOPE_SUPER | (allowDirectSuper ? SCOPE_DIRECT_SUPER : 0));
+    this.yieldPos = 0;
+    this.awaitPos = 0;
+    this.awaitIdentPos = 0;
+    this.enterScope(functionFlags(isAsync, node.generator) | SCOPE_SUPER | (allowDirectSuper ? SCOPE_DIRECT_SUPER : 0));
 
-  this.expect(types.parenL);
-  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
-  this.checkYieldAwaitInDefaultParams();
-  this.parseFunctionBody(node, false, true);
+    this.expect(types.parenL);
+    node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+    this.checkYieldAwaitInDefaultParams();
+    this.parseFunctionBody(node, false, true);
 
-  this.yieldPos = oldYieldPos;
-  this.awaitPos = oldAwaitPos;
-  this.awaitIdentPos = oldAwaitIdentPos;
-  return this.finishNode(node, "FunctionExpression")
-};
+    this.yieldPos = oldYieldPos;
+    this.awaitPos = oldAwaitPos;
+    this.awaitIdentPos = oldAwaitIdentPos;
+    return this.finishNode(node, "FunctionExpression")
+  };
 
-// Parse arrow function expression with given parameters.
+  // Parse arrow function expression with given parameters.
 
-pp$3.parseArrowExpression = function(node, params, isAsync) {
-  var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
+  pp$3.parseArrowExpression = function(node, params, isAsync) {
+    var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldAwaitIdentPos = this.awaitIdentPos;
 
-  this.enterScope(functionFlags(isAsync, false) | SCOPE_ARROW);
-  this.initFunction(node);
-  if (this.options.ecmaVersion >= 8) { node.async = !!isAsync; }
+    this.enterScope(functionFlags(isAsync, false) | SCOPE_ARROW);
+    this.initFunction(node);
+    if (this.options.ecmaVersion >= 8) { node.async = !!isAsync; }
 
-  this.yieldPos = 0;
-  this.awaitPos = 0;
-  this.awaitIdentPos = 0;
+    this.yieldPos = 0;
+    this.awaitPos = 0;
+    this.awaitIdentPos = 0;
 
-  node.params = this.toAssignableList(params, true);
-  this.parseFunctionBody(node, true, false);
+    node.params = this.toAssignableList(params, true);
+    this.parseFunctionBody(node, true, false);
 
-  this.yieldPos = oldYieldPos;
-  this.awaitPos = oldAwaitPos;
-  this.awaitIdentPos = oldAwaitIdentPos;
-  return this.finishNode(node, "ArrowFunctionExpression")
-};
+    this.yieldPos = oldYieldPos;
+    this.awaitPos = oldAwaitPos;
+    this.awaitIdentPos = oldAwaitIdentPos;
+    return this.finishNode(node, "ArrowFunctionExpression")
+  };
 
-// Parse function body and check parameters.
-
-pp$3.parseFunctionBody = function(node, isArrowFunction, isMethod) {
-  var isExpression = isArrowFunction && this.type !== types.braceL;
-  var oldStrict = this.strict, useStrict = false;
-
-  if (isExpression) {
-    node.body = this.parseMaybeAssign();
-    node.expression = true;
-    this.checkParams(node, false);
-  } else {
-    var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
-    if (!oldStrict || nonSimple) {
-      useStrict = this.strictDirective(this.end);
-      // If this is a strict mode function, verify that argument names
-      // are not repeated, and it does not try to bind the words `eval`
-      // or `arguments`.
-      if (useStrict && nonSimple)
-        { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
-    }
-    // Start a new scope with regard to labels and the `inFunction`
-    // flag (restore them to their old value afterwards).
-    var oldLabels = this.labels;
-    this.labels = [];
-    if (useStrict) { this.strict = true; }
-
-    // Add the params to varDeclaredNames to ensure that an error is thrown
-    // if a let/const declaration in the function clashes with one of the params.
-    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && !isMethod && this.isSimpleParamList(node.params));
-    node.body = this.parseBlock(false);
-    node.expression = false;
-    this.adaptDirectivePrologue(node.body.body);
-    this.labels = oldLabels;
-  }
-  this.exitScope();
+  // Parse function body and check parameters.
 
-  // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
-  if (this.strict && node.id) { this.checkLVal(node.id, BIND_OUTSIDE); }
-  this.strict = oldStrict;
-};
+  pp$3.parseFunctionBody = function(node, isArrowFunction, isMethod) {
+    var isExpression = isArrowFunction && this.type !== types.braceL;
+    var oldStrict = this.strict, useStrict = false;
 
-pp$3.isSimpleParamList = function(params) {
-  for (var i = 0, list = params; i < list.length; i += 1)
-    {
-    var param = list[i];
+    if (isExpression) {
+      node.body = this.parseMaybeAssign();
+      node.expression = true;
+      this.checkParams(node, false);
+    } else {
+      var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
+      if (!oldStrict || nonSimple) {
+        useStrict = this.strictDirective(this.end);
+        // If this is a strict mode function, verify that argument names
+        // are not repeated, and it does not try to bind the words `eval`
+        // or `arguments`.
+        if (useStrict && nonSimple)
+          { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
+      }
+      // Start a new scope with regard to labels and the `inFunction`
+      // flag (restore them to their old value afterwards).
+      var oldLabels = this.labels;
+      this.labels = [];
+      if (useStrict) { this.strict = true; }
+
+      // Add the params to varDeclaredNames to ensure that an error is thrown
+      // if a let/const declaration in the function clashes with one of the params.
+      this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && !isMethod && this.isSimpleParamList(node.params));
+      node.body = this.parseBlock(false);
+      node.expression = false;
+      this.adaptDirectivePrologue(node.body.body);
+      this.labels = oldLabels;
+    }
+    this.exitScope();
 
-    if (param.type !== "Identifier") { return false
-  } }
-  return true
-};
+    // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
+    if (this.strict && node.id) { this.checkLVal(node.id, BIND_OUTSIDE); }
+    this.strict = oldStrict;
+  };
 
-// Checks function params for various disallowed patterns such as using "eval"
-// or "arguments" and duplicate parameters.
+  pp$3.isSimpleParamList = function(params) {
+    for (var i = 0, list = params; i < list.length; i += 1)
+      {
+      var param = list[i];
 
-pp$3.checkParams = function(node, allowDuplicates) {
-  var this$1 = this;
+      if (param.type !== "Identifier") { return false
+    } }
+    return true
+  };
 
-  var nameHash = {};
-  for (var i = 0, list = node.params; i < list.length; i += 1)
-    {
-    var param = list[i];
+  // Checks function params for various disallowed patterns such as using "eval"
+  // or "arguments" and duplicate parameters.
 
-    this$1.checkLVal(param, BIND_VAR, allowDuplicates ? null : nameHash);
-  }
-};
+  pp$3.checkParams = function(node, allowDuplicates) {
+    var nameHash = {};
+    for (var i = 0, list = node.params; i < list.length; i += 1)
+      {
+      var param = list[i];
 
-// Parses a comma-separated list of expressions, and returns them as
-// an array. `close` is the token type that ends the list, and
-// `allowEmpty` can be turned on to allow subsequent commas with
-// nothing in between them to be parsed as `null` (which is needed
-// for array literals).
-
-pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
-  var this$1 = this;
-
-  var elts = [], first = true;
-  while (!this.eat(close)) {
-    if (!first) {
-      this$1.expect(types.comma);
-      if (allowTrailingComma && this$1.afterTrailingComma(close)) { break }
-    } else { first = false; }
-
-    var elt = (void 0);
-    if (allowEmpty && this$1.type === types.comma)
-      { elt = null; }
-    else if (this$1.type === types.ellipsis) {
-      elt = this$1.parseSpread(refDestructuringErrors);
-      if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0)
-        { refDestructuringErrors.trailingComma = this$1.start; }
-    } else {
-      elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
+      this.checkLVal(param, BIND_VAR, allowDuplicates ? null : nameHash);
     }
-    elts.push(elt);
-  }
-  return elts
-};
+  };
 
-pp$3.checkUnreserved = function(ref) {
-  var start = ref.start;
-  var end = ref.end;
-  var name = ref.name;
-
-  if (this.inGenerator && name === "yield")
-    { this.raiseRecoverable(start, "Cannot use 'yield' as identifier inside a generator"); }
-  if (this.inAsync && name === "await")
-    { this.raiseRecoverable(start, "Cannot use 'await' as identifier inside an async function"); }
-  if (this.keywords.test(name))
-    { this.raise(start, ("Unexpected keyword '" + name + "'")); }
-  if (this.options.ecmaVersion < 6 &&
-    this.input.slice(start, end).indexOf("\\") !== -1) { return }
-  var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
-  if (re.test(name)) {
-    if (!this.inAsync && name === "await")
-      { this.raiseRecoverable(start, "Cannot use keyword 'await' outside an async function"); }
-    this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved"));
-  }
-};
+  // Parses a comma-separated list of expressions, and returns them as
+  // an array. `close` is the token type that ends the list, and
+  // `allowEmpty` can be turned on to allow subsequent commas with
+  // nothing in between them to be parsed as `null` (which is needed
+  // for array literals).
+
+  pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
+    var elts = [], first = true;
+    while (!this.eat(close)) {
+      if (!first) {
+        this.expect(types.comma);
+        if (allowTrailingComma && this.afterTrailingComma(close)) { break }
+      } else { first = false; }
+
+      var elt = (void 0);
+      if (allowEmpty && this.type === types.comma)
+        { elt = null; }
+      else if (this.type === types.ellipsis) {
+        elt = this.parseSpread(refDestructuringErrors);
+        if (refDestructuringErrors && this.type === types.comma && refDestructuringErrors.trailingComma < 0)
+          { refDestructuringErrors.trailingComma = this.start; }
+      } else {
+        elt = this.parseMaybeAssign(false, refDestructuringErrors);
+      }
+      elts.push(elt);
+    }
+    return elts
+  };
 
-// Parse the next token as an identifier. If `liberal` is true (used
-// when parsing properties), it will also convert keywords into
-// identifiers.
-
-pp$3.parseIdent = function(liberal, isBinding) {
-  var node = this.startNode();
-  if (liberal && this.options.allowReserved === "never") { liberal = false; }
-  if (this.type === types.name) {
-    node.name = this.value;
-  } else if (this.type.keyword) {
-    node.name = this.type.keyword;
-
-    // To fix https://github.com/acornjs/acorn/issues/575
-    // `class` and `function` keywords push new context into this.context.
-    // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name.
-    // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword
-    if ((node.name === "class" || node.name === "function") &&
-        (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) {
-      this.context.pop();
-    }
-  } else {
-    this.unexpected();
-  }
-  this.next();
-  this.finishNode(node, "Identifier");
-  if (!liberal) {
-    this.checkUnreserved(node);
-    if (node.name === "await" && !this.awaitIdentPos)
-      { this.awaitIdentPos = node.start; }
-  }
-  return node
-};
+  pp$3.checkUnreserved = function(ref) {
+    var start = ref.start;
+    var end = ref.end;
+    var name = ref.name;
+
+    if (this.inGenerator && name === "yield")
+      { this.raiseRecoverable(start, "Cannot use 'yield' as identifier inside a generator"); }
+    if (this.inAsync && name === "await")
+      { this.raiseRecoverable(start, "Cannot use 'await' as identifier inside an async function"); }
+    if (this.keywords.test(name))
+      { this.raise(start, ("Unexpected keyword '" + name + "'")); }
+    if (this.options.ecmaVersion < 6 &&
+      this.input.slice(start, end).indexOf("\\") !== -1) { return }
+    var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
+    if (re.test(name)) {
+      if (!this.inAsync && name === "await")
+        { this.raiseRecoverable(start, "Cannot use keyword 'await' outside an async function"); }
+      this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved"));
+    }
+  };
 
-// Parses yield expression inside generator.
+  // Parse the next token as an identifier. If `liberal` is true (used
+  // when parsing properties), it will also convert keywords into
+  // identifiers.
 
-pp$3.parseYield = function(noIn) {
-  if (!this.yieldPos) { this.yieldPos = this.start; }
+  pp$3.parseIdent = function(liberal, isBinding) {
+    var node = this.startNode();
+    if (this.type === types.name) {
+      node.name = this.value;
+    } else if (this.type.keyword) {
+      node.name = this.type.keyword;
+
+      // To fix https://github.com/acornjs/acorn/issues/575
+      // `class` and `function` keywords push new context into this.context.
+      // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name.
+      // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword
+      if ((node.name === "class" || node.name === "function") &&
+          (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) {
+        this.context.pop();
+      }
+    } else {
+      this.unexpected();
+    }
+    this.next(!!liberal);
+    this.finishNode(node, "Identifier");
+    if (!liberal) {
+      this.checkUnreserved(node);
+      if (node.name === "await" && !this.awaitIdentPos)
+        { this.awaitIdentPos = node.start; }
+    }
+    return node
+  };
 
-  var node = this.startNode();
-  this.next();
-  if (this.type === types.semi || this.canInsertSemicolon() || (this.type !== types.star && !this.type.startsExpr)) {
-    node.delegate = false;
-    node.argument = null;
-  } else {
-    node.delegate = this.eat(types.star);
-    node.argument = this.parseMaybeAssign(noIn);
-  }
-  return this.finishNode(node, "YieldExpression")
-};
+  // Parses yield expression inside generator.
 
-pp$3.parseAwait = function() {
-  if (!this.awaitPos) { this.awaitPos = this.start; }
+  pp$3.parseYield = function(noIn) {
+    if (!this.yieldPos) { this.yieldPos = this.start; }
 
-  var node = this.startNode();
-  this.next();
-  node.argument = this.parseMaybeUnary(null, true);
-  return this.finishNode(node, "AwaitExpression")
-};
+    var node = this.startNode();
+    this.next();
+    if (this.type === types.semi || this.canInsertSemicolon() || (this.type !== types.star && !this.type.startsExpr)) {
+      node.delegate = false;
+      node.argument = null;
+    } else {
+      node.delegate = this.eat(types.star);
+      node.argument = this.parseMaybeAssign(noIn);
+    }
+    return this.finishNode(node, "YieldExpression")
+  };
 
-var pp$4 = Parser.prototype;
+  pp$3.parseAwait = function() {
+    if (!this.awaitPos) { this.awaitPos = this.start; }
 
-// This function is used to raise exceptions on parse errors. It
-// takes an offset integer (into the current `input`) to indicate
-// the location of the error, attaches the position to the end
-// of the error message, and then raises a `SyntaxError` with that
-// message.
+    var node = this.startNode();
+    this.next();
+    node.argument = this.parseMaybeUnary(null, false);
+    return this.finishNode(node, "AwaitExpression")
+  };
 
-pp$4.raise = function(pos, message) {
-  var loc = getLineInfo(this.input, pos);
-  message += " (" + loc.line + ":" + loc.column + ")";
-  var err = new SyntaxError(message);
-  err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
-  throw err
-};
+  var pp$4 = Parser.prototype;
 
-pp$4.raiseRecoverable = pp$4.raise;
+  // This function is used to raise exceptions on parse errors. It
+  // takes an offset integer (into the current `input`) to indicate
+  // the location of the error, attaches the position to the end
+  // of the error message, and then raises a `SyntaxError` with that
+  // message.
 
-pp$4.curPosition = function() {
-  if (this.options.locations) {
-    return new Position(this.curLine, this.pos - this.lineStart)
-  }
-};
+  pp$4.raise = function(pos, message) {
+    var loc = getLineInfo(this.input, pos);
+    message += " (" + loc.line + ":" + loc.column + ")";
+    var err = new SyntaxError(message);
+    err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
+    throw err
+  };
 
-var pp$5 = Parser.prototype;
+  pp$4.raiseRecoverable = pp$4.raise;
 
-var Scope = function Scope(flags) {
-  this.flags = flags;
-  // A list of var-declared names in the current lexical scope
-  this.var = [];
-  // A list of lexically-declared names in the current lexical scope
-  this.lexical = [];
-  // A list of lexically-declared FunctionDeclaration names in the current lexical scope
-  this.functions = [];
-};
+  pp$4.curPosition = function() {
+    if (this.options.locations) {
+      return new Position(this.curLine, this.pos - this.lineStart)
+    }
+  };
 
-// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
+  var pp$5 = Parser.prototype;
 
-pp$5.enterScope = function(flags) {
-  this.scopeStack.push(new Scope(flags));
-};
+  var Scope = function Scope(flags) {
+    this.flags = flags;
+    // A list of var-declared names in the current lexical scope
+    this.var = [];
+    // A list of lexically-declared names in the current lexical scope
+    this.lexical = [];
+    // A list of lexically-declared FunctionDeclaration names in the current lexical scope
+    this.functions = [];
+  };
 
-pp$5.exitScope = function() {
-  this.scopeStack.pop();
-};
+  // The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
 
-// The spec says:
-// > At the top level of a function, or script, function declarations are
-// > treated like var declarations rather than like lexical declarations.
-pp$5.treatFunctionsAsVarInScope = function(scope) {
-  return (scope.flags & SCOPE_FUNCTION) || !this.inModule && (scope.flags & SCOPE_TOP)
-};
+  pp$5.enterScope = function(flags) {
+    this.scopeStack.push(new Scope(flags));
+  };
 
-pp$5.declareName = function(name, bindingType, pos) {
-  var this$1 = this;
-
-  var redeclared = false;
-  if (bindingType === BIND_LEXICAL) {
-    var scope = this.currentScope();
-    redeclared = scope.lexical.indexOf(name) > -1 || scope.functions.indexOf(name) > -1 || scope.var.indexOf(name) > -1;
-    scope.lexical.push(name);
-    if (this.inModule && (scope.flags & SCOPE_TOP))
-      { delete this.undefinedExports[name]; }
-  } else if (bindingType === BIND_SIMPLE_CATCH) {
-    var scope$1 = this.currentScope();
-    scope$1.lexical.push(name);
-  } else if (bindingType === BIND_FUNCTION) {
-    var scope$2 = this.currentScope();
-    if (this.treatFunctionsAsVar)
-      { redeclared = scope$2.lexical.indexOf(name) > -1; }
-    else
-      { redeclared = scope$2.lexical.indexOf(name) > -1 || scope$2.var.indexOf(name) > -1; }
-    scope$2.functions.push(name);
-  } else {
-    for (var i = this.scopeStack.length - 1; i >= 0; --i) {
-      var scope$3 = this$1.scopeStack[i];
-      if (scope$3.lexical.indexOf(name) > -1 && !((scope$3.flags & SCOPE_SIMPLE_CATCH) && scope$3.lexical[0] === name) ||
-          !this$1.treatFunctionsAsVarInScope(scope$3) && scope$3.functions.indexOf(name) > -1) {
-        redeclared = true;
-        break
+  pp$5.exitScope = function() {
+    this.scopeStack.pop();
+  };
+
+  // The spec says:
+  // > At the top level of a function, or script, function declarations are
+  // > treated like var declarations rather than like lexical declarations.
+  pp$5.treatFunctionsAsVarInScope = function(scope) {
+    return (scope.flags & SCOPE_FUNCTION) || !this.inModule && (scope.flags & SCOPE_TOP)
+  };
+
+  pp$5.declareName = function(name, bindingType, pos) {
+    var redeclared = false;
+    if (bindingType === BIND_LEXICAL) {
+      var scope = this.currentScope();
+      redeclared = scope.lexical.indexOf(name) > -1 || scope.functions.indexOf(name) > -1 || scope.var.indexOf(name) > -1;
+      scope.lexical.push(name);
+      if (this.inModule && (scope.flags & SCOPE_TOP))
+        { delete this.undefinedExports[name]; }
+    } else if (bindingType === BIND_SIMPLE_CATCH) {
+      var scope$1 = this.currentScope();
+      scope$1.lexical.push(name);
+    } else if (bindingType === BIND_FUNCTION) {
+      var scope$2 = this.currentScope();
+      if (this.treatFunctionsAsVar)
+        { redeclared = scope$2.lexical.indexOf(name) > -1; }
+      else
+        { redeclared = scope$2.lexical.indexOf(name) > -1 || scope$2.var.indexOf(name) > -1; }
+      scope$2.functions.push(name);
+    } else {
+      for (var i = this.scopeStack.length - 1; i >= 0; --i) {
+        var scope$3 = this.scopeStack[i];
+        if (scope$3.lexical.indexOf(name) > -1 && !((scope$3.flags & SCOPE_SIMPLE_CATCH) && scope$3.lexical[0] === name) ||
+            !this.treatFunctionsAsVarInScope(scope$3) && scope$3.functions.indexOf(name) > -1) {
+          redeclared = true;
+          break
+        }
+        scope$3.var.push(name);
+        if (this.inModule && (scope$3.flags & SCOPE_TOP))
+          { delete this.undefinedExports[name]; }
+        if (scope$3.flags & SCOPE_VAR) { break }
       }
-      scope$3.var.push(name);
-      if (this$1.inModule && (scope$3.flags & SCOPE_TOP))
-        { delete this$1.undefinedExports[name]; }
-      if (scope$3.flags & SCOPE_VAR) { break }
     }
-  }
-  if (redeclared) { this.raiseRecoverable(pos, ("Identifier '" + name + "' has already been declared")); }
-};
-
-pp$5.checkLocalExport = function(id) {
-  // scope.functions must be empty as Module code is always strict.
-  if (this.scopeStack[0].lexical.indexOf(id.name) === -1 &&
-      this.scopeStack[0].var.indexOf(id.name) === -1) {
-    this.undefinedExports[id.name] = id;
-  }
-};
+    if (redeclared) { this.raiseRecoverable(pos, ("Identifier '" + name + "' has already been declared")); }
+  };
 
-pp$5.currentScope = function() {
-  return this.scopeStack[this.scopeStack.length - 1]
-};
+  pp$5.checkLocalExport = function(id) {
+    // scope.functions must be empty as Module code is always strict.
+    if (this.scopeStack[0].lexical.indexOf(id.name) === -1 &&
+        this.scopeStack[0].var.indexOf(id.name) === -1) {
+      this.undefinedExports[id.name] = id;
+    }
+  };
 
-pp$5.currentVarScope = function() {
-  var this$1 = this;
+  pp$5.currentScope = function() {
+    return this.scopeStack[this.scopeStack.length - 1]
+  };
 
-  for (var i = this.scopeStack.length - 1;; i--) {
-    var scope = this$1.scopeStack[i];
-    if (scope.flags & SCOPE_VAR) { return scope }
-  }
-};
+  pp$5.currentVarScope = function() {
+    for (var i = this.scopeStack.length - 1;; i--) {
+      var scope = this.scopeStack[i];
+      if (scope.flags & SCOPE_VAR) { return scope }
+    }
+  };
 
-// Could be useful for `this`, `new.target`, `super()`, `super.property`, and `super[property]`.
-pp$5.currentThisScope = function() {
-  var this$1 = this;
+  // Could be useful for `this`, `new.target`, `super()`, `super.property`, and `super[property]`.
+  pp$5.currentThisScope = function() {
+    for (var i = this.scopeStack.length - 1;; i--) {
+      var scope = this.scopeStack[i];
+      if (scope.flags & SCOPE_VAR && !(scope.flags & SCOPE_ARROW)) { return scope }
+    }
+  };
 
-  for (var i = this.scopeStack.length - 1;; i--) {
-    var scope = this$1.scopeStack[i];
-    if (scope.flags & SCOPE_VAR && !(scope.flags & SCOPE_ARROW)) { return scope }
-  }
-};
+  var Node = function Node(parser, pos, loc) {
+    this.type = "";
+    this.start = pos;
+    this.end = 0;
+    if (parser.options.locations)
+      { this.loc = new SourceLocation(parser, loc); }
+    if (parser.options.directSourceFile)
+      { this.sourceFile = parser.options.directSourceFile; }
+    if (parser.options.ranges)
+      { this.range = [pos, 0]; }
+  };
 
-var Node = function Node(parser, pos, loc) {
-  this.type = "";
-  this.start = pos;
-  this.end = 0;
-  if (parser.options.locations)
-    { this.loc = new SourceLocation(parser, loc); }
-  if (parser.options.directSourceFile)
-    { this.sourceFile = parser.options.directSourceFile; }
-  if (parser.options.ranges)
-    { this.range = [pos, 0]; }
-};
+  // Start an AST node, attaching a start offset.
 
-// Start an AST node, attaching a start offset.
+  var pp$6 = Parser.prototype;
 
-var pp$6 = Parser.prototype;
+  pp$6.startNode = function() {
+    return new Node(this, this.start, this.startLoc)
+  };
 
-pp$6.startNode = function() {
-  return new Node(this, this.start, this.startLoc)
-};
+  pp$6.startNodeAt = function(pos, loc) {
+    return new Node(this, pos, loc)
+  };
 
-pp$6.startNodeAt = function(pos, loc) {
-  return new Node(this, pos, loc)
-};
+  // Finish an AST node, adding `type` and `end` properties.
 
-// Finish an AST node, adding `type` and `end` properties.
+  function finishNodeAt(node, type, pos, loc) {
+    node.type = type;
+    node.end = pos;
+    if (this.options.locations)
+      { node.loc.end = loc; }
+    if (this.options.ranges)
+      { node.range[1] = pos; }
+    return node
+  }
 
-function finishNodeAt(node, type, pos, loc) {
-  node.type = type;
-  node.end = pos;
-  if (this.options.locations)
-    { node.loc.end = loc; }
-  if (this.options.ranges)
-    { node.range[1] = pos; }
-  return node
-}
+  pp$6.finishNode = function(node, type) {
+    return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
+  };
 
-pp$6.finishNode = function(node, type) {
-  return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
-};
+  // Finish node at given position
 
-// Finish node at given position
+  pp$6.finishNodeAt = function(node, type, pos, loc) {
+    return finishNodeAt.call(this, node, type, pos, loc)
+  };
 
-pp$6.finishNodeAt = function(node, type, pos, loc) {
-  return finishNodeAt.call(this, node, type, pos, loc)
-};
+  // The algorithm used to determine whether a regexp can appear at a
 
-// The algorithm used to determine whether a regexp can appear at a
-// given point in the program is loosely based on sweet.js' approach.
-// See https://github.com/mozilla/sweet.js/wiki/design
+  var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
+    this.token = token;
+    this.isExpr = !!isExpr;
+    this.preserveSpace = !!preserveSpace;
+    this.override = override;
+    this.generator = !!generator;
+  };
 
-var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
-  this.token = token;
-  this.isExpr = !!isExpr;
-  this.preserveSpace = !!preserveSpace;
-  this.override = override;
-  this.generator = !!generator;
-};
+  var types$1 = {
+    b_stat: new TokContext("{", false),
+    b_expr: new TokContext("{", true),
+    b_tmpl: new TokContext("${", false),
+    p_stat: new TokContext("(", false),
+    p_expr: new TokContext("(", true),
+    q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
+    f_stat: new TokContext("function", false),
+    f_expr: new TokContext("function", true),
+    f_expr_gen: new TokContext("function", true, false, null, true),
+    f_gen: new TokContext("function", false, false, null, true)
+  };
 
-var types$1 = {
-  b_stat: new TokContext("{", false),
-  b_expr: new TokContext("{", true),
-  b_tmpl: new TokContext("${", false),
-  p_stat: new TokContext("(", false),
-  p_expr: new TokContext("(", true),
-  q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
-  f_stat: new TokContext("function", false),
-  f_expr: new TokContext("function", true),
-  f_expr_gen: new TokContext("function", true, false, null, true),
-  f_gen: new TokContext("function", false, false, null, true)
-};
+  var pp$7 = Parser.prototype;
 
-var pp$7 = Parser.prototype;
+  pp$7.initialContext = function() {
+    return [types$1.b_stat]
+  };
 
-pp$7.initialContext = function() {
-  return [types$1.b_stat]
-};
+  pp$7.braceIsBlock = function(prevType) {
+    var parent = this.curContext();
+    if (parent === types$1.f_expr || parent === types$1.f_stat)
+      { return true }
+    if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr))
+      { return !parent.isExpr }
+
+    // The check for `tt.name && exprAllowed` detects whether we are
+    // after a `yield` or `of` construct. See the `updateContext` for
+    // `tt.name`.
+    if (prevType === types._return || prevType === types.name && this.exprAllowed)
+      { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
+    if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow)
+      { return true }
+    if (prevType === types.braceL)
+      { return parent === types$1.b_stat }
+    if (prevType === types._var || prevType === types._const || prevType === types.name)
+      { return false }
+    return !this.exprAllowed
+  };
 
-pp$7.braceIsBlock = function(prevType) {
-  var parent = this.curContext();
-  if (parent === types$1.f_expr || parent === types$1.f_stat)
-    { return true }
-  if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr))
-    { return !parent.isExpr }
-
-  // The check for `tt.name && exprAllowed` detects whether we are
-  // after a `yield` or `of` construct. See the `updateContext` for
-  // `tt.name`.
-  if (prevType === types._return || prevType === types.name && this.exprAllowed)
-    { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
-  if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow)
-    { return true }
-  if (prevType === types.braceL)
-    { return parent === types$1.b_stat }
-  if (prevType === types._var || prevType === types._const || prevType === types.name)
-    { return false }
-  return !this.exprAllowed
-};
+  pp$7.inGeneratorContext = function() {
+    for (var i = this.context.length - 1; i >= 1; i--) {
+      var context = this.context[i];
+      if (context.token === "function")
+        { return context.generator }
+    }
+    return false
+  };
 
-pp$7.inGeneratorContext = function() {
-  var this$1 = this;
+  pp$7.updateContext = function(prevType) {
+    var update, type = this.type;
+    if (type.keyword && prevType === types.dot)
+      { this.exprAllowed = false; }
+    else if (update = type.updateContext)
+      { update.call(this, prevType); }
+    else
+      { this.exprAllowed = type.beforeExpr; }
+  };
 
-  for (var i = this.context.length - 1; i >= 1; i--) {
-    var context = this$1.context[i];
-    if (context.token === "function")
-      { return context.generator }
-  }
-  return false
-};
+  // Token-specific context update code
 
-pp$7.updateContext = function(prevType) {
-  var update, type = this.type;
-  if (type.keyword && prevType === types.dot)
-    { this.exprAllowed = false; }
-  else if (update = type.updateContext)
-    { update.call(this, prevType); }
-  else
-    { this.exprAllowed = type.beforeExpr; }
-};
+  types.parenR.updateContext = types.braceR.updateContext = function() {
+    if (this.context.length === 1) {
+      this.exprAllowed = true;
+      return
+    }
+    var out = this.context.pop();
+    if (out === types$1.b_stat && this.curContext().token === "function") {
+      out = this.context.pop();
+    }
+    this.exprAllowed = !out.isExpr;
+  };
 
-// Token-specific context update code
+  types.braceL.updateContext = function(prevType) {
+    this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
+    this.exprAllowed = true;
+  };
 
-types.parenR.updateContext = types.braceR.updateContext = function() {
-  if (this.context.length === 1) {
+  types.dollarBraceL.updateContext = function() {
+    this.context.push(types$1.b_tmpl);
     this.exprAllowed = true;
-    return
-  }
-  var out = this.context.pop();
-  if (out === types$1.b_stat && this.curContext().token === "function") {
-    out = this.context.pop();
-  }
-  this.exprAllowed = !out.isExpr;
-};
+  };
 
-types.braceL.updateContext = function(prevType) {
-  this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
-  this.exprAllowed = true;
-};
+  types.parenL.updateContext = function(prevType) {
+    var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
+    this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
+    this.exprAllowed = true;
+  };
 
-types.dollarBraceL.updateContext = function() {
-  this.context.push(types$1.b_tmpl);
-  this.exprAllowed = true;
-};
+  types.incDec.updateContext = function() {
+    // tokExprAllowed stays unchanged
+  };
 
-types.parenL.updateContext = function(prevType) {
-  var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
-  this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
-  this.exprAllowed = true;
-};
+  types._function.updateContext = types._class.updateContext = function(prevType) {
+    if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
+        !(prevType === types._return && lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) &&
+        !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
+      { this.context.push(types$1.f_expr); }
+    else
+      { this.context.push(types$1.f_stat); }
+    this.exprAllowed = false;
+  };
 
-types.incDec.updateContext = function() {
-  // tokExprAllowed stays unchanged
-};
+  types.backQuote.updateContext = function() {
+    if (this.curContext() === types$1.q_tmpl)
+      { this.context.pop(); }
+    else
+      { this.context.push(types$1.q_tmpl); }
+    this.exprAllowed = false;
+  };
 
-types._function.updateContext = types._class.updateContext = function(prevType) {
-  if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
-      !(prevType === types._return && lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) &&
-      !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
-    { this.context.push(types$1.f_expr); }
-  else
-    { this.context.push(types$1.f_stat); }
-  this.exprAllowed = false;
-};
+  types.star.updateContext = function(prevType) {
+    if (prevType === types._function) {
+      var index = this.context.length - 1;
+      if (this.context[index] === types$1.f_expr)
+        { this.context[index] = types$1.f_expr_gen; }
+      else
+        { this.context[index] = types$1.f_gen; }
+    }
+    this.exprAllowed = true;
+  };
 
-types.backQuote.updateContext = function() {
-  if (this.curContext() === types$1.q_tmpl)
-    { this.context.pop(); }
-  else
-    { this.context.push(types$1.q_tmpl); }
-  this.exprAllowed = false;
-};
+  types.name.updateContext = function(prevType) {
+    var allowed = false;
+    if (this.options.ecmaVersion >= 6 && prevType !== types.dot) {
+      if (this.value === "of" && !this.exprAllowed ||
+          this.value === "yield" && this.inGeneratorContext())
+        { allowed = true; }
+    }
+    this.exprAllowed = allowed;
+  };
 
-types.star.updateContext = function(prevType) {
-  if (prevType === types._function) {
-    var index = this.context.length - 1;
-    if (this.context[index] === types$1.f_expr)
-      { this.context[index] = types$1.f_expr_gen; }
-    else
-      { this.context[index] = types$1.f_gen; }
-  }
-  this.exprAllowed = true;
-};
+  // This file contains Unicode properties extracted from the ECMAScript
+  // specification. The lists are extracted like so:
+  // $$('#table-binary-unicode-properties > figure > table > tbody > tr > td:nth-child(1) code').map(el => el.innerText)
+
+  // #table-binary-unicode-properties
+  var ecma9BinaryProperties = "ASCII ASCII_Hex_Digit AHex Alphabetic Alpha Any Assigned Bidi_Control Bidi_C Bidi_Mirrored Bidi_M Case_Ignorable CI Cased Changes_When_Casefolded CWCF Changes_When_Casemapped CWCM Changes_When_Lowercased CWL Changes_When_NFKC_Casefolded CWKCF Changes_When_Titlecased CWT Changes_When_Uppercased CWU Dash Default_Ignorable_Code_Point DI Deprecated Dep Diacritic Dia Emoji Emoji_Component Emoji_Modifier Emoji_Modifier_Base Emoji_Presentation Extender Ext Grapheme_Base Gr_Base Grapheme_Extend Gr_Ext Hex_Digit Hex IDS_Binary_Operator IDSB IDS_Trinary_Operator IDST ID_Continue IDC ID_Start IDS Ideographic Ideo Join_Control Join_C Logical_Order_Exception LOE Lowercase Lower Math Noncharacter_Code_Point NChar Pattern_Syntax Pat_Syn Pattern_White_Space Pat_WS Quotation_Mark QMark Radical Regional_Indicator RI Sentence_Terminal STerm Soft_Dotted SD Terminal_Punctuation Term Unified_Ideograph UIdeo Uppercase Upper Variation_Selector VS White_Space space XID_Continue XIDC XID_Start XIDS";
+  var ecma10BinaryProperties = ecma9BinaryProperties + " Extended_Pictographic";
+  var ecma11BinaryProperties = ecma10BinaryProperties;
+  var unicodeBinaryProperties = {
+    9: ecma9BinaryProperties,
+    10: ecma10BinaryProperties,
+    11: ecma11BinaryProperties
+  };
 
-types.name.updateContext = function(prevType) {
-  var allowed = false;
-  if (this.options.ecmaVersion >= 6 && prevType !== types.dot) {
-    if (this.value === "of" && !this.exprAllowed ||
-        this.value === "yield" && this.inGeneratorContext())
-      { allowed = true; }
-  }
-  this.exprAllowed = allowed;
-};
+  // #table-unicode-general-category-values
+  var unicodeGeneralCategoryValues = "Cased_Letter LC Close_Punctuation Pe Connector_Punctuation Pc Control Cc cntrl Currency_Symbol Sc Dash_Punctuation Pd Decimal_Number Nd digit Enclosing_Mark Me Final_Punctuation Pf Format Cf Initial_Punctuation Pi Letter L Letter_Number Nl Line_Separator Zl Lowercase_Letter Ll Mark M Combining_Mark Math_Symbol Sm Modifier_Letter Lm Modifier_Symbol Sk Nonspacing_Mark Mn Number N Open_Punctuation Ps Other C Other_Letter Lo Other_Number No Other_Punctuation Po Other_Symbol So Paragraph_Separator Zp Private_Use Co Punctuation P punct Separator Z Space_Separator Zs Spacing_Mark Mc Surrogate Cs Symbol S Titlecase_Letter Lt Unassigned Cn Uppercase_Letter Lu";
+
+  // #table-unicode-script-values
+  var ecma9ScriptValues = "Adlam Adlm Ahom Ahom Anatolian_Hieroglyphs Hluw Arabic Arab Armenian Armn Avestan Avst Balinese Bali Bamum Bamu Bassa_Vah Bass Batak Batk Bengali Beng Bhaiksuki Bhks Bopomofo Bopo Brahmi Brah Braille Brai Buginese Bugi Buhid Buhd Canadian_Aboriginal Cans Carian Cari Caucasian_Albanian Aghb Chakma Cakm Cham Cham Cherokee Cher Common Zyyy Coptic Copt Qaac Cuneiform Xsux Cypriot Cprt Cyrillic Cyrl Deseret Dsrt Devanagari Deva Duployan Dupl Egyptian_Hieroglyphs Egyp Elbasan Elba Ethiopic Ethi Georgian Geor Glagolitic Glag Gothic Goth Grantha Gran Greek Grek Gujarati Gujr Gurmukhi Guru Han Hani Hangul Hang Hanunoo Hano Hatran Hatr Hebrew Hebr Hiragana Hira Imperial_Aramaic Armi Inherited Zinh Qaai Inscriptional_Pahlavi Phli Inscriptional_Parthian Prti Javanese Java Kaithi Kthi Kannada Knda Katakana Kana Kayah_Li Kali Kharoshthi Khar Khmer Khmr Khojki Khoj Khudawadi Sind Lao Laoo Latin Latn Lepcha Lepc Limbu Limb Linear_A Lina Linear_B Linb Lisu Lisu Lycian Lyci Lydian Lydi Mahajani Mahj Malayalam Mlym Mandaic Mand Manichaean Mani Marchen Marc Masaram_Gondi Gonm Meetei_Mayek Mtei Mende_Kikakui Mend Meroitic_Cursive Merc Meroitic_Hieroglyphs Mero Miao Plrd Modi Modi Mongolian Mong Mro Mroo Multani Mult Myanmar Mymr Nabataean Nbat New_Tai_Lue Talu Newa Newa Nko Nkoo Nushu Nshu Ogham Ogam Ol_Chiki Olck Old_Hungarian Hung Old_Italic Ital Old_North_Arabian Narb Old_Permic Perm Old_Persian Xpeo Old_South_Arabian Sarb Old_Turkic Orkh Oriya Orya Osage Osge Osmanya Osma Pahawh_Hmong Hmng Palmyrene Palm Pau_Cin_Hau Pauc Phags_Pa Phag Phoenician Phnx Psalter_Pahlavi Phlp Rejang Rjng Runic Runr Samaritan Samr Saurashtra Saur Sharada Shrd Shavian Shaw Siddham Sidd SignWriting Sgnw Sinhala Sinh Sora_Sompeng Sora Soyombo Soyo Sundanese Sund Syloti_Nagri Sylo Syriac Syrc Tagalog Tglg Tagbanwa Tagb Tai_Le Tale Tai_Tham Lana Tai_Viet Tavt Takri Takr Tamil Taml Tangut Tang Telugu Telu Thaana Thaa Thai Thai Tibetan Tibt Tifinagh Tfng Tirhuta Tirh Ugaritic Ugar Vai Vaii Warang_Citi Wara Yi Yiii Zanabazar_Square Zanb";
+  var ecma10ScriptValues = ecma9ScriptValues + " Dogra Dogr Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Old_Sogdian Sogo Sogdian Sogd";
+  var ecma11ScriptValues = ecma10ScriptValues + " Elymaic Elym Nandinagari Nand Nyiakeng_Puachue_Hmong Hmnp Wancho Wcho";
+  var unicodeScriptValues = {
+    9: ecma9ScriptValues,
+    10: ecma10ScriptValues,
+    11: ecma11ScriptValues
+  };
 
-// This file contains Unicode properties extracted from the ECMAScript
-// specification. The lists are extracted like so:
-// $$('#table-binary-unicode-properties > figure > table > tbody > tr > td:nth-child(1) code').map(el => el.innerText)
+  var data = {};
+  function buildUnicodeData(ecmaVersion) {
+    var d = data[ecmaVersion] = {
+      binary: wordsRegexp(unicodeBinaryProperties[ecmaVersion] + " " + unicodeGeneralCategoryValues),
+      nonBinary: {
+        General_Category: wordsRegexp(unicodeGeneralCategoryValues),
+        Script: wordsRegexp(unicodeScriptValues[ecmaVersion])
+      }
+    };
+    d.nonBinary.Script_Extensions = d.nonBinary.Script;
+
+    d.nonBinary.gc = d.nonBinary.General_Category;
+    d.nonBinary.sc = d.nonBinary.Script;
+    d.nonBinary.scx = d.nonBinary.Script_Extensions;
+  }
+  buildUnicodeData(9);
+  buildUnicodeData(10);
+  buildUnicodeData(11);
+
+  var pp$8 = Parser.prototype;
+
+  var RegExpValidationState = function RegExpValidationState(parser) {
+    this.parser = parser;
+    this.validFlags = "gim" + (parser.options.ecmaVersion >= 6 ? "uy" : "") + (parser.options.ecmaVersion >= 9 ? "s" : "");
+    this.unicodeProperties = data[parser.options.ecmaVersion >= 11 ? 11 : parser.options.ecmaVersion];
+    this.source = "";
+    this.flags = "";
+    this.start = 0;
+    this.switchU = false;
+    this.switchN = false;
+    this.pos = 0;
+    this.lastIntValue = 0;
+    this.lastStringValue = "";
+    this.lastAssertionIsQuantifiable = false;
+    this.numCapturingParens = 0;
+    this.maxBackReference = 0;
+    this.groupNames = [];
+    this.backReferenceNames = [];
+  };
 
-// #table-binary-unicode-properties
-var ecma9BinaryProperties = "ASCII ASCII_Hex_Digit AHex Alphabetic Alpha Any Assigned Bidi_Control Bidi_C Bidi_Mirrored Bidi_M Case_Ignorable CI Cased Changes_When_Casefolded CWCF Changes_When_Casemapped CWCM Changes_When_Lowercased CWL Changes_When_NFKC_Casefolded CWKCF Changes_When_Titlecased CWT Changes_When_Uppercased CWU Dash Default_Ignorable_Code_Point DI Deprecated Dep Diacritic Dia Emoji Emoji_Component Emoji_Modifier Emoji_Modifier_Base Emoji_Presentation Extender Ext Grapheme_Base Gr_Base Grapheme_Extend Gr_Ext Hex_Digit Hex IDS_Binary_Operator IDSB IDS_Trinary_Operator IDST ID_Continue IDC ID_Start IDS Ideographic Ideo Join_Control Join_C Logical_Order_Exception LOE Lowercase Lower Math Noncharacter_Code_Point NChar Pattern_Syntax Pat_Syn Pattern_White_Space Pat_WS Quotation_Mark QMark Radical Regional_Indicator RI Sentence_Terminal STerm Soft_Dotted SD Terminal_Punctuation Term Unified_Ideograph UIdeo Uppercase Upper Variation_Selector VS White_Space space XID_Continue XIDC XID_Start XIDS";
-var unicodeBinaryProperties = {
-  9: ecma9BinaryProperties,
-  10: ecma9BinaryProperties + " Extended_Pictographic"
-};
+  RegExpValidationState.prototype.reset = function reset (start, pattern, flags) {
+    var unicode = flags.indexOf("u") !== -1;
+    this.start = start | 0;
+    this.source = pattern + "";
+    this.flags = flags;
+    this.switchU = unicode && this.parser.options.ecmaVersion >= 6;
+    this.switchN = unicode && this.parser.options.ecmaVersion >= 9;
+  };
 
-// #table-unicode-general-category-values
-var unicodeGeneralCategoryValues = "Cased_Letter LC Close_Punctuation Pe Connector_Punctuation Pc Control Cc cntrl Currency_Symbol Sc Dash_Punctuation Pd Decimal_Number Nd digit Enclosing_Mark Me Final_Punctuation Pf Format Cf Initial_Punctuation Pi Letter L Letter_Number Nl Line_Separator Zl Lowercase_Letter Ll Mark M Combining_Mark Math_Symbol Sm Modifier_Letter Lm Modifier_Symbol Sk Nonspacing_Mark Mn Number N Open_Punctuation Ps Other C Other_Letter Lo Other_Number No Other_Punctuation Po Other_Symbol So Paragraph_Separator Zp Private_Use Co Punctuation P punct Separator Z Space_Separator Zs Spacing_Mark Mc Surrogate Cs Symbol S Titlecase_Letter Lt Unassigned Cn Uppercase_Letter Lu";
+  RegExpValidationState.prototype.raise = function raise (message) {
+    this.parser.raiseRecoverable(this.start, ("Invalid regular expression: /" + (this.source) + "/: " + message));
+  };
 
-// #table-unicode-script-values
-var ecma9ScriptValues = "Adlam Adlm Ahom Ahom Anatolian_Hieroglyphs Hluw Arabic Arab Armenian Armn Avestan Avst Balinese Bali Bamum Bamu Bassa_Vah Bass Batak Batk Bengali Beng Bhaiksuki Bhks Bopomofo Bopo Brahmi Brah Braille Brai Buginese Bugi Buhid Buhd Canadian_Aboriginal Cans Carian Cari Caucasian_Albanian Aghb Chakma Cakm Cham Cham Cherokee Cher Common Zyyy Coptic Copt Qaac Cuneiform Xsux Cypriot Cprt Cyrillic Cyrl Deseret Dsrt Devanagari Deva Duployan Dupl Egyptian_Hieroglyphs Egyp Elbasan Elba Ethiopic Ethi Georgian Geor Glagolitic Glag Gothic Goth Grantha Gran Greek Grek Gujarati Gujr Gurmukhi Guru Han Hani Hangul Hang Hanunoo Hano Hatran Hatr Hebrew Hebr Hiragana Hira Imperial_Aramaic Armi Inherited Zinh Qaai Inscriptional_Pahlavi Phli Inscriptional_Parthian Prti Javanese Java Kaithi Kthi Kannada Knda Katakana Kana Kayah_Li Kali Kharoshthi Khar Khmer Khmr Khojki Khoj Khudawadi Sind Lao Laoo Latin Latn Lepcha Lepc Limbu Limb Linear_A Lina Linear_B Linb Lisu Lisu Lycian Lyci Lydian Lydi Mahajani Mahj Malayalam Mlym Mandaic Mand Manichaean Mani Marchen Marc Masaram_Gondi Gonm Meetei_Mayek Mtei Mende_Kikakui Mend Meroitic_Cursive Merc Meroitic_Hieroglyphs Mero Miao Plrd Modi Modi Mongolian Mong Mro Mroo Multani Mult Myanmar Mymr Nabataean Nbat New_Tai_Lue Talu Newa Newa Nko Nkoo Nushu Nshu Ogham Ogam Ol_Chiki Olck Old_Hungarian Hung Old_Italic Ital Old_North_Arabian Narb Old_Permic Perm Old_Persian Xpeo Old_South_Arabian Sarb Old_Turkic Orkh Oriya Orya Osage Osge Osmanya Osma Pahawh_Hmong Hmng Palmyrene Palm Pau_Cin_Hau Pauc Phags_Pa Phag Phoenician Phnx Psalter_Pahlavi Phlp Rejang Rjng Runic Runr Samaritan Samr Saurashtra Saur Sharada Shrd Shavian Shaw Siddham Sidd SignWriting Sgnw Sinhala Sinh Sora_Sompeng Sora Soyombo Soyo Sundanese Sund Syloti_Nagri Sylo Syriac Syrc Tagalog Tglg Tagbanwa Tagb Tai_Le Tale Tai_Tham Lana Tai_Viet Tavt Takri Takr Tamil Taml Tangut Tang Telugu Telu Thaana Thaa Thai Thai Tibetan Tibt Tifinagh Tfng Tirhuta Tirh Ugaritic Ugar Vai Vaii Warang_Citi Wara Yi Yiii Zanabazar_Square Zanb";
-var unicodeScriptValues = {
-  9: ecma9ScriptValues,
-  10: ecma9ScriptValues + " Dogra Dogr Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Old_Sogdian Sogo Sogdian Sogd"
-};
+  // If u flag is given, this returns the code point at the index (it combines a surrogate pair).
+  // Otherwise, this returns the code unit of the index (can be a part of a surrogate pair).
+  RegExpValidationState.prototype.at = function at (i) {
+    var s = this.source;
+    var l = s.length;
+    if (i >= l) {
+      return -1
+    }
+    var c = s.charCodeAt(i);
+    if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
+      return c
+    }
+    var next = s.charCodeAt(i + 1);
+    return next >= 0xDC00 && next <= 0xDFFF ? (c << 10) + next - 0x35FDC00 : c
+  };
 
-var data = {};
-function buildUnicodeData(ecmaVersion) {
-  var d = data[ecmaVersion] = {
-    binary: wordsRegexp(unicodeBinaryProperties[ecmaVersion] + " " + unicodeGeneralCategoryValues),
-    nonBinary: {
-      General_Category: wordsRegexp(unicodeGeneralCategoryValues),
-      Script: wordsRegexp(unicodeScriptValues[ecmaVersion])
+  RegExpValidationState.prototype.nextIndex = function nextIndex (i) {
+    var s = this.source;
+    var l = s.length;
+    if (i >= l) {
+      return l
+    }
+    var c = s.charCodeAt(i), next;
+    if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l ||
+        (next = s.charCodeAt(i + 1)) < 0xDC00 || next > 0xDFFF) {
+      return i + 1
     }
+    return i + 2
   };
-  d.nonBinary.Script_Extensions = d.nonBinary.Script;
 
-  d.nonBinary.gc = d.nonBinary.General_Category;
-  d.nonBinary.sc = d.nonBinary.Script;
-  d.nonBinary.scx = d.nonBinary.Script_Extensions;
-}
-buildUnicodeData(9);
-buildUnicodeData(10);
-
-var pp$9 = Parser.prototype;
-
-var RegExpValidationState = function RegExpValidationState(parser) {
-  this.parser = parser;
-  this.validFlags = "gim" + (parser.options.ecmaVersion >= 6 ? "uy" : "") + (parser.options.ecmaVersion >= 9 ? "s" : "");
-  this.unicodeProperties = data[parser.options.ecmaVersion >= 10 ? 10 : parser.options.ecmaVersion];
-  this.source = "";
-  this.flags = "";
-  this.start = 0;
-  this.switchU = false;
-  this.switchN = false;
-  this.pos = 0;
-  this.lastIntValue = 0;
-  this.lastStringValue = "";
-  this.lastAssertionIsQuantifiable = false;
-  this.numCapturingParens = 0;
-  this.maxBackReference = 0;
-  this.groupNames = [];
-  this.backReferenceNames = [];
-};
+  RegExpValidationState.prototype.current = function current () {
+    return this.at(this.pos)
+  };
 
-RegExpValidationState.prototype.reset = function reset (start, pattern, flags) {
-  var unicode = flags.indexOf("u") !== -1;
-  this.start = start | 0;
-  this.source = pattern + "";
-  this.flags = flags;
-  this.switchU = unicode && this.parser.options.ecmaVersion >= 6;
-  this.switchN = unicode && this.parser.options.ecmaVersion >= 9;
-};
+  RegExpValidationState.prototype.lookahead = function lookahead () {
+    return this.at(this.nextIndex(this.pos))
+  };
 
-RegExpValidationState.prototype.raise = function raise (message) {
-  this.parser.raiseRecoverable(this.start, ("Invalid regular expression: /" + (this.source) + "/: " + message));
-};
+  RegExpValidationState.prototype.advance = function advance () {
+    this.pos = this.nextIndex(this.pos);
+  };
 
-// If u flag is given, this returns the code point at the index (it combines a surrogate pair).
-// Otherwise, this returns the code unit of the index (can be a part of a surrogate pair).
-RegExpValidationState.prototype.at = function at (i) {
-  var s = this.source;
-  var l = s.length;
-  if (i >= l) {
-    return -1
-  }
-  var c = s.charCodeAt(i);
-  if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
-    return c
-  }
-  return (c << 10) + s.charCodeAt(i + 1) - 0x35FDC00
-};
+  RegExpValidationState.prototype.eat = function eat (ch) {
+    if (this.current() === ch) {
+      this.advance();
+      return true
+    }
+    return false
+  };
 
-RegExpValidationState.prototype.nextIndex = function nextIndex (i) {
-  var s = this.source;
-  var l = s.length;
-  if (i >= l) {
-    return l
-  }
-  var c = s.charCodeAt(i);
-  if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
-    return i + 1
+  function codePointToString(ch) {
+    if (ch <= 0xFFFF) { return String.fromCharCode(ch) }
+    ch -= 0x10000;
+    return String.fromCharCode((ch >> 10) + 0xD800, (ch & 0x03FF) + 0xDC00)
   }
-  return i + 2
-};
-
-RegExpValidationState.prototype.current = function current () {
-  return this.at(this.pos)
-};
-
-RegExpValidationState.prototype.lookahead = function lookahead () {
-  return this.at(this.nextIndex(this.pos))
-};
 
-RegExpValidationState.prototype.advance = function advance () {
-  this.pos = this.nextIndex(this.pos);
-};
+  /**
+   * Validate the flags part of a given RegExpLiteral.
+   *
+   * @param {RegExpValidationState} state The state to validate RegExp.
+   * @returns {void}
+   */
+  pp$8.validateRegExpFlags = function(state) {
+    var validFlags = state.validFlags;
+    var flags = state.flags;
+
+    for (var i = 0; i < flags.length; i++) {
+      var flag = flags.charAt(i);
+      if (validFlags.indexOf(flag) === -1) {
+        this.raise(state.start, "Invalid regular expression flag");
+      }
+      if (flags.indexOf(flag, i + 1) > -1) {
+        this.raise(state.start, "Duplicate regular expression flag");
+      }
+    }
+  };
 
-RegExpValidationState.prototype.eat = function eat (ch) {
-  if (this.current() === ch) {
-    this.advance();
-    return true
-  }
-  return false
-};
+  /**
+   * Validate the pattern part of a given RegExpLiteral.
+   *
+   * @param {RegExpValidationState} state The state to validate RegExp.
+   * @returns {void}
+   */
+  pp$8.validateRegExpPattern = function(state) {
+    this.regexp_pattern(state);
 
-function codePointToString$1(ch) {
-  if (ch <= 0xFFFF) { return String.fromCharCode(ch) }
-  ch -= 0x10000;
-  return String.fromCharCode((ch >> 10) + 0xD800, (ch & 0x03FF) + 0xDC00)
-}
+    // The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of
+    // parsing contains a |GroupName|, reparse with the goal symbol
+    // |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError*
+    // exception if _P_ did not conform to the grammar, if any elements of _P_
+    // were not matched by the parse, or if any Early Error conditions exist.
+    if (!state.switchN && this.options.ecmaVersion >= 9 && state.groupNames.length > 0) {
+      state.switchN = true;
+      this.regexp_pattern(state);
+    }
+  };
 
-/**
- * Validate the flags part of a given RegExpLiteral.
- *
- * @param {RegExpValidationState} state The state to validate RegExp.
- * @returns {void}
- */
-pp$9.validateRegExpFlags = function(state) {
-  var this$1 = this;
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern
+  pp$8.regexp_pattern = function(state) {
+    state.pos = 0;
+    state.lastIntValue = 0;
+    state.lastStringValue = "";
+    state.lastAssertionIsQuantifiable = false;
+    state.numCapturingParens = 0;
+    state.maxBackReference = 0;
+    state.groupNames.length = 0;
+    state.backReferenceNames.length = 0;
 
-  var validFlags = state.validFlags;
-  var flags = state.flags;
+    this.regexp_disjunction(state);
 
-  for (var i = 0; i < flags.length; i++) {
-    var flag = flags.charAt(i);
-    if (validFlags.indexOf(flag) === -1) {
-      this$1.raise(state.start, "Invalid regular expression flag");
+    if (state.pos !== state.source.length) {
+      // Make the same messages as V8.
+      if (state.eat(0x29 /* ) */)) {
+        state.raise("Unmatched ')'");
+      }
+      if (state.eat(0x5D /* ] */) || state.eat(0x7D /* } */)) {
+        state.raise("Lone quantifier brackets");
+      }
     }
-    if (flags.indexOf(flag, i + 1) > -1) {
-      this$1.raise(state.start, "Duplicate regular expression flag");
+    if (state.maxBackReference > state.numCapturingParens) {
+      state.raise("Invalid escape");
     }
-  }
-};
+    for (var i = 0, list = state.backReferenceNames; i < list.length; i += 1) {
+      var name = list[i];
 
-/**
- * Validate the pattern part of a given RegExpLiteral.
- *
- * @param {RegExpValidationState} state The state to validate RegExp.
- * @returns {void}
- */
-pp$9.validateRegExpPattern = function(state) {
-  this.regexp_pattern(state);
-
-  // The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of
-  // parsing contains a |GroupName|, reparse with the goal symbol
-  // |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError*
-  // exception if _P_ did not conform to the grammar, if any elements of _P_
-  // were not matched by the parse, or if any Early Error conditions exist.
-  if (!state.switchN && this.options.ecmaVersion >= 9 && state.groupNames.length > 0) {
-    state.switchN = true;
-    this.regexp_pattern(state);
-  }
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern
-pp$9.regexp_pattern = function(state) {
-  state.pos = 0;
-  state.lastIntValue = 0;
-  state.lastStringValue = "";
-  state.lastAssertionIsQuantifiable = false;
-  state.numCapturingParens = 0;
-  state.maxBackReference = 0;
-  state.groupNames.length = 0;
-  state.backReferenceNames.length = 0;
-
-  this.regexp_disjunction(state);
-
-  if (state.pos !== state.source.length) {
-    // Make the same messages as V8.
-    if (state.eat(0x29 /* ) */)) {
-      state.raise("Unmatched ')'");
-    }
-    if (state.eat(0x5D /* [ */) || state.eat(0x7D /* } */)) {
-      state.raise("Lone quantifier brackets");
+      if (state.groupNames.indexOf(name) === -1) {
+        state.raise("Invalid named capture referenced");
+      }
     }
-  }
-  if (state.maxBackReference > state.numCapturingParens) {
-    state.raise("Invalid escape");
-  }
-  for (var i = 0, list = state.backReferenceNames; i < list.length; i += 1) {
-    var name = list[i];
+  };
 
-    if (state.groupNames.indexOf(name) === -1) {
-      state.raise("Invalid named capture referenced");
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction
+  pp$8.regexp_disjunction = function(state) {
+    this.regexp_alternative(state);
+    while (state.eat(0x7C /* | */)) {
+      this.regexp_alternative(state);
     }
-  }
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction
-pp$9.regexp_disjunction = function(state) {
-  var this$1 = this;
 
-  this.regexp_alternative(state);
-  while (state.eat(0x7C /* | */)) {
-    this$1.regexp_alternative(state);
-  }
-
-  // Make the same message as V8.
-  if (this.regexp_eatQuantifier(state, true)) {
-    state.raise("Nothing to repeat");
-  }
-  if (state.eat(0x7B /* { */)) {
-    state.raise("Lone quantifier brackets");
-  }
-};
+    // Make the same message as V8.
+    if (this.regexp_eatQuantifier(state, true)) {
+      state.raise("Nothing to repeat");
+    }
+    if (state.eat(0x7B /* { */)) {
+      state.raise("Lone quantifier brackets");
+    }
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative
-pp$9.regexp_alternative = function(state) {
-  while (state.pos < state.source.length && this.regexp_eatTerm(state))
-    {  }
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative
+  pp$8.regexp_alternative = function(state) {
+    while (state.pos < state.source.length && this.regexp_eatTerm(state))
+      { }
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term
-pp$9.regexp_eatTerm = function(state) {
-  if (this.regexp_eatAssertion(state)) {
-    // Handle `QuantifiableAssertion Quantifier` alternative.
-    // `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion
-    // is a QuantifiableAssertion.
-    if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) {
-      // Make the same message as V8.
-      if (state.switchU) {
-        state.raise("Invalid quantifier");
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term
+  pp$8.regexp_eatTerm = function(state) {
+    if (this.regexp_eatAssertion(state)) {
+      // Handle `QuantifiableAssertion Quantifier` alternative.
+      // `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion
+      // is a QuantifiableAssertion.
+      if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) {
+        // Make the same message as V8.
+        if (state.switchU) {
+          state.raise("Invalid quantifier");
+        }
       }
+      return true
     }
-    return true
-  }
-
-  if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) {
-    this.regexp_eatQuantifier(state);
-    return true
-  }
 
-  return false
-};
+    if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) {
+      this.regexp_eatQuantifier(state);
+      return true
+    }
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion
-pp$9.regexp_eatAssertion = function(state) {
-  var start = state.pos;
-  state.lastAssertionIsQuantifiable = false;
+    return false
+  };
 
-  // ^, $
-  if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) {
-    return true
-  }
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion
+  pp$8.regexp_eatAssertion = function(state) {
+    var start = state.pos;
+    state.lastAssertionIsQuantifiable = false;
 
-  // \b \B
-  if (state.eat(0x5C /* \ */)) {
-    if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) {
+    // ^, $
+    if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) {
       return true
     }
-    state.pos = start;
-  }
 
-  // Lookahead / Lookbehind
-  if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) {
-    var lookbehind = false;
-    if (this.options.ecmaVersion >= 9) {
-      lookbehind = state.eat(0x3C /* < */);
+    // \b \B
+    if (state.eat(0x5C /* \ */)) {
+      if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) {
+        return true
+      }
+      state.pos = start;
     }
-    if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) {
-      this.regexp_disjunction(state);
-      if (!state.eat(0x29 /* ) */)) {
-        state.raise("Unterminated group");
+
+    // Lookahead / Lookbehind
+    if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) {
+      var lookbehind = false;
+      if (this.options.ecmaVersion >= 9) {
+        lookbehind = state.eat(0x3C /* < */);
+      }
+      if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) {
+        this.regexp_disjunction(state);
+        if (!state.eat(0x29 /* ) */)) {
+          state.raise("Unterminated group");
+        }
+        state.lastAssertionIsQuantifiable = !lookbehind;
+        return true
       }
-      state.lastAssertionIsQuantifiable = !lookbehind;
-      return true
     }
-  }
 
-  state.pos = start;
-  return false
-};
+    state.pos = start;
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier
-pp$9.regexp_eatQuantifier = function(state, noError) {
-  if ( noError === void 0 ) noError = false;
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier
+  pp$8.regexp_eatQuantifier = function(state, noError) {
+    if ( noError === void 0 ) noError = false;
 
-  if (this.regexp_eatQuantifierPrefix(state, noError)) {
-    state.eat(0x3F /* ? */);
-    return true
-  }
-  return false
-};
+    if (this.regexp_eatQuantifierPrefix(state, noError)) {
+      state.eat(0x3F /* ? */);
+      return true
+    }
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix
-pp$9.regexp_eatQuantifierPrefix = function(state, noError) {
-  return (
-    state.eat(0x2A /* * */) ||
-    state.eat(0x2B /* + */) ||
-    state.eat(0x3F /* ? */) ||
-    this.regexp_eatBracedQuantifier(state, noError)
-  )
-};
-pp$9.regexp_eatBracedQuantifier = function(state, noError) {
-  var start = state.pos;
-  if (state.eat(0x7B /* { */)) {
-    var min = 0, max = -1;
-    if (this.regexp_eatDecimalDigits(state)) {
-      min = state.lastIntValue;
-      if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) {
-        max = state.lastIntValue;
-      }
-      if (state.eat(0x7D /* } */)) {
-        // SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term
-        if (max !== -1 && max < min && !noError) {
-          state.raise("numbers out of order in {} quantifier");
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix
+  pp$8.regexp_eatQuantifierPrefix = function(state, noError) {
+    return (
+      state.eat(0x2A /* * */) ||
+      state.eat(0x2B /* + */) ||
+      state.eat(0x3F /* ? */) ||
+      this.regexp_eatBracedQuantifier(state, noError)
+    )
+  };
+  pp$8.regexp_eatBracedQuantifier = function(state, noError) {
+    var start = state.pos;
+    if (state.eat(0x7B /* { */)) {
+      var min = 0, max = -1;
+      if (this.regexp_eatDecimalDigits(state)) {
+        min = state.lastIntValue;
+        if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) {
+          max = state.lastIntValue;
+        }
+        if (state.eat(0x7D /* } */)) {
+          // SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term
+          if (max !== -1 && max < min && !noError) {
+            state.raise("numbers out of order in {} quantifier");
+          }
+          return true
         }
-        return true
       }
+      if (state.switchU && !noError) {
+        state.raise("Incomplete quantifier");
+      }
+      state.pos = start;
     }
-    if (state.switchU && !noError) {
-      state.raise("Incomplete quantifier");
-    }
-    state.pos = start;
-  }
-  return false
-};
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-Atom
-pp$9.regexp_eatAtom = function(state) {
-  return (
-    this.regexp_eatPatternCharacters(state) ||
-    state.eat(0x2E /* . */) ||
-    this.regexp_eatReverseSolidusAtomEscape(state) ||
-    this.regexp_eatCharacterClass(state) ||
-    this.regexp_eatUncapturingGroup(state) ||
-    this.regexp_eatCapturingGroup(state)
-  )
-};
-pp$9.regexp_eatReverseSolidusAtomEscape = function(state) {
-  var start = state.pos;
-  if (state.eat(0x5C /* \ */)) {
-    if (this.regexp_eatAtomEscape(state)) {
-      return true
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-Atom
+  pp$8.regexp_eatAtom = function(state) {
+    return (
+      this.regexp_eatPatternCharacters(state) ||
+      state.eat(0x2E /* . */) ||
+      this.regexp_eatReverseSolidusAtomEscape(state) ||
+      this.regexp_eatCharacterClass(state) ||
+      this.regexp_eatUncapturingGroup(state) ||
+      this.regexp_eatCapturingGroup(state)
+    )
+  };
+  pp$8.regexp_eatReverseSolidusAtomEscape = function(state) {
+    var start = state.pos;
+    if (state.eat(0x5C /* \ */)) {
+      if (this.regexp_eatAtomEscape(state)) {
+        return true
+      }
+      state.pos = start;
     }
-    state.pos = start;
-  }
-  return false
-};
-pp$9.regexp_eatUncapturingGroup = function(state) {
-  var start = state.pos;
-  if (state.eat(0x28 /* ( */)) {
-    if (state.eat(0x3F /* ? */) && state.eat(0x3A /* : */)) {
+    return false
+  };
+  pp$8.regexp_eatUncapturingGroup = function(state) {
+    var start = state.pos;
+    if (state.eat(0x28 /* ( */)) {
+      if (state.eat(0x3F /* ? */) && state.eat(0x3A /* : */)) {
+        this.regexp_disjunction(state);
+        if (state.eat(0x29 /* ) */)) {
+          return true
+        }
+        state.raise("Unterminated group");
+      }
+      state.pos = start;
+    }
+    return false
+  };
+  pp$8.regexp_eatCapturingGroup = function(state) {
+    if (state.eat(0x28 /* ( */)) {
+      if (this.options.ecmaVersion >= 9) {
+        this.regexp_groupSpecifier(state);
+      } else if (state.current() === 0x3F /* ? */) {
+        state.raise("Invalid group");
+      }
       this.regexp_disjunction(state);
       if (state.eat(0x29 /* ) */)) {
+        state.numCapturingParens += 1;
         return true
       }
       state.raise("Unterminated group");
     }
-    state.pos = start;
-  }
-  return false
-};
-pp$9.regexp_eatCapturingGroup = function(state) {
-  if (state.eat(0x28 /* ( */)) {
-    if (this.options.ecmaVersion >= 9) {
-      this.regexp_groupSpecifier(state);
-    } else if (state.current() === 0x3F /* ? */) {
-      state.raise("Invalid group");
-    }
-    this.regexp_disjunction(state);
-    if (state.eat(0x29 /* ) */)) {
-      state.numCapturingParens += 1;
-      return true
-    }
-    state.raise("Unterminated group");
-  }
-  return false
-};
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom
-pp$9.regexp_eatExtendedAtom = function(state) {
-  return (
-    state.eat(0x2E /* . */) ||
-    this.regexp_eatReverseSolidusAtomEscape(state) ||
-    this.regexp_eatCharacterClass(state) ||
-    this.regexp_eatUncapturingGroup(state) ||
-    this.regexp_eatCapturingGroup(state) ||
-    this.regexp_eatInvalidBracedQuantifier(state) ||
-    this.regexp_eatExtendedPatternCharacter(state)
-  )
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom
+  pp$8.regexp_eatExtendedAtom = function(state) {
+    return (
+      state.eat(0x2E /* . */) ||
+      this.regexp_eatReverseSolidusAtomEscape(state) ||
+      this.regexp_eatCharacterClass(state) ||
+      this.regexp_eatUncapturingGroup(state) ||
+      this.regexp_eatCapturingGroup(state) ||
+      this.regexp_eatInvalidBracedQuantifier(state) ||
+      this.regexp_eatExtendedPatternCharacter(state)
+    )
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier
-pp$9.regexp_eatInvalidBracedQuantifier = function(state) {
-  if (this.regexp_eatBracedQuantifier(state, true)) {
-    state.raise("Nothing to repeat");
-  }
-  return false
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier
+  pp$8.regexp_eatInvalidBracedQuantifier = function(state) {
+    if (this.regexp_eatBracedQuantifier(state, true)) {
+      state.raise("Nothing to repeat");
+    }
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter
-pp$9.regexp_eatSyntaxCharacter = function(state) {
-  var ch = state.current();
-  if (isSyntaxCharacter(ch)) {
-    state.lastIntValue = ch;
-    state.advance();
-    return true
-  }
-  return false
-};
-function isSyntaxCharacter(ch) {
-  return (
-    ch === 0x24 /* $ */ ||
-    ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ ||
-    ch === 0x2E /* . */ ||
-    ch === 0x3F /* ? */ ||
-    ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ ||
-    ch >= 0x7B /* { */ && ch <= 0x7D /* } */
-  )
-}
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter
+  pp$8.regexp_eatSyntaxCharacter = function(state) {
+    var ch = state.current();
+    if (isSyntaxCharacter(ch)) {
+      state.lastIntValue = ch;
+      state.advance();
+      return true
+    }
+    return false
+  };
+  function isSyntaxCharacter(ch) {
+    return (
+      ch === 0x24 /* $ */ ||
+      ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ ||
+      ch === 0x2E /* . */ ||
+      ch === 0x3F /* ? */ ||
+      ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ ||
+      ch >= 0x7B /* { */ && ch <= 0x7D /* } */
+    )
+  }
+
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter
+  // But eat eager.
+  pp$8.regexp_eatPatternCharacters = function(state) {
+    var start = state.pos;
+    var ch = 0;
+    while ((ch = state.current()) !== -1 && !isSyntaxCharacter(ch)) {
+      state.advance();
+    }
+    return state.pos !== start
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter
-// But eat eager.
-pp$9.regexp_eatPatternCharacters = function(state) {
-  var start = state.pos;
-  var ch = 0;
-  while ((ch = state.current()) !== -1 && !isSyntaxCharacter(ch)) {
-    state.advance();
-  }
-  return state.pos !== start
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter
+  pp$8.regexp_eatExtendedPatternCharacter = function(state) {
+    var ch = state.current();
+    if (
+      ch !== -1 &&
+      ch !== 0x24 /* $ */ &&
+      !(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) &&
+      ch !== 0x2E /* . */ &&
+      ch !== 0x3F /* ? */ &&
+      ch !== 0x5B /* [ */ &&
+      ch !== 0x5E /* ^ */ &&
+      ch !== 0x7C /* | */
+    ) {
+      state.advance();
+      return true
+    }
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter
-pp$9.regexp_eatExtendedPatternCharacter = function(state) {
-  var ch = state.current();
-  if (
-    ch !== -1 &&
-    ch !== 0x24 /* $ */ &&
-    !(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) &&
-    ch !== 0x2E /* . */ &&
-    ch !== 0x3F /* ? */ &&
-    ch !== 0x5B /* [ */ &&
-    ch !== 0x5E /* ^ */ &&
-    ch !== 0x7C /* | */
-  ) {
-    state.advance();
-    return true
-  }
-  return false
-};
+  // GroupSpecifier[U] ::
+  //   [empty]
+  //   `?` GroupName[?U]
+  pp$8.regexp_groupSpecifier = function(state) {
+    if (state.eat(0x3F /* ? */)) {
+      if (this.regexp_eatGroupName(state)) {
+        if (state.groupNames.indexOf(state.lastStringValue) !== -1) {
+          state.raise("Duplicate capture group name");
+        }
+        state.groupNames.push(state.lastStringValue);
+        return
+      }
+      state.raise("Invalid group");
+    }
+  };
 
-// GroupSpecifier[U] ::
-//   [empty]
-//   `?` GroupName[?U]
-pp$9.regexp_groupSpecifier = function(state) {
-  if (state.eat(0x3F /* ? */)) {
-    if (this.regexp_eatGroupName(state)) {
-      if (state.groupNames.indexOf(state.lastStringValue) !== -1) {
-        state.raise("Duplicate capture group name");
+  // GroupName[U] ::
+  //   `<` RegExpIdentifierName[?U] `>`
+  // Note: this updates `state.lastStringValue` property with the eaten name.
+  pp$8.regexp_eatGroupName = function(state) {
+    state.lastStringValue = "";
+    if (state.eat(0x3C /* < */)) {
+      if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) {
+        return true
       }
-      state.groupNames.push(state.lastStringValue);
-      return
+      state.raise("Invalid capture group name");
     }
-    state.raise("Invalid group");
-  }
-};
+    return false
+  };
 
-// GroupName[U] ::
-//   `<` RegExpIdentifierName[?U] `>`
-// Note: this updates `state.lastStringValue` property with the eaten name.
-pp$9.regexp_eatGroupName = function(state) {
-  state.lastStringValue = "";
-  if (state.eat(0x3C /* < */)) {
-    if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) {
+  // RegExpIdentifierName[U] ::
+  //   RegExpIdentifierStart[?U]
+  //   RegExpIdentifierName[?U] RegExpIdentifierPart[?U]
+  // Note: this updates `state.lastStringValue` property with the eaten name.
+  pp$8.regexp_eatRegExpIdentifierName = function(state) {
+    state.lastStringValue = "";
+    if (this.regexp_eatRegExpIdentifierStart(state)) {
+      state.lastStringValue += codePointToString(state.lastIntValue);
+      while (this.regexp_eatRegExpIdentifierPart(state)) {
+        state.lastStringValue += codePointToString(state.lastIntValue);
+      }
       return true
     }
-    state.raise("Invalid capture group name");
-  }
-  return false
-};
+    return false
+  };
+
+  // RegExpIdentifierStart[U] ::
+  //   UnicodeIDStart
+  //   `$`
+  //   `_`
+  //   `\` RegExpUnicodeEscapeSequence[?U]
+  pp$8.regexp_eatRegExpIdentifierStart = function(state) {
+    var start = state.pos;
+    var ch = state.current();
+    state.advance();
 
-// RegExpIdentifierName[U] ::
-//   RegExpIdentifierStart[?U]
-//   RegExpIdentifierName[?U] RegExpIdentifierPart[?U]
-// Note: this updates `state.lastStringValue` property with the eaten name.
-pp$9.regexp_eatRegExpIdentifierName = function(state) {
-  state.lastStringValue = "";
-  if (this.regexp_eatRegExpIdentifierStart(state)) {
-    state.lastStringValue += codePointToString$1(state.lastIntValue);
-    while (this.regexp_eatRegExpIdentifierPart(state)) {
-      state.lastStringValue += codePointToString$1(state.lastIntValue);
+    if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {
+      ch = state.lastIntValue;
+    }
+    if (isRegExpIdentifierStart(ch)) {
+      state.lastIntValue = ch;
+      return true
     }
-    return true
-  }
-  return false
-};
 
-// RegExpIdentifierStart[U] ::
-//   UnicodeIDStart
-//   `$`
-//   `_`
-//   `\` RegExpUnicodeEscapeSequence[?U]
-pp$9.regexp_eatRegExpIdentifierStart = function(state) {
-  var start = state.pos;
-  var ch = state.current();
-  state.advance();
-
-  if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {
-    ch = state.lastIntValue;
-  }
-  if (isRegExpIdentifierStart(ch)) {
-    state.lastIntValue = ch;
-    return true
-  }
+    state.pos = start;
+    return false
+  };
+  function isRegExpIdentifierStart(ch) {
+    return isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */
+  }
+
+  // RegExpIdentifierPart[U] ::
+  //   UnicodeIDContinue
+  //   `$`
+  //   `_`
+  //   `\` RegExpUnicodeEscapeSequence[?U]
+  //   <ZWNJ>
+  //   <ZWJ>
+  pp$8.regexp_eatRegExpIdentifierPart = function(state) {
+    var start = state.pos;
+    var ch = state.current();
+    state.advance();
 
-  state.pos = start;
-  return false
-};
-function isRegExpIdentifierStart(ch) {
-  return isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */
-}
+    if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {
+      ch = state.lastIntValue;
+    }
+    if (isRegExpIdentifierPart(ch)) {
+      state.lastIntValue = ch;
+      return true
+    }
 
-// RegExpIdentifierPart[U] ::
-//   UnicodeIDContinue
-//   `$`
-//   `_`
-//   `\` RegExpUnicodeEscapeSequence[?U]
-//   <ZWNJ>
-//   <ZWJ>
-pp$9.regexp_eatRegExpIdentifierPart = function(state) {
-  var start = state.pos;
-  var ch = state.current();
-  state.advance();
-
-  if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {
-    ch = state.lastIntValue;
-  }
-  if (isRegExpIdentifierPart(ch)) {
-    state.lastIntValue = ch;
-    return true
+    state.pos = start;
+    return false
+  };
+  function isRegExpIdentifierPart(ch) {
+    return isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* <ZWNJ> */ || ch === 0x200D /* <ZWJ> */
   }
 
-  state.pos = start;
-  return false
-};
-function isRegExpIdentifierPart(ch) {
-  return isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* <ZWNJ> */ || ch === 0x200D /* <ZWJ> */
-}
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape
-pp$9.regexp_eatAtomEscape = function(state) {
-  if (
-    this.regexp_eatBackReference(state) ||
-    this.regexp_eatCharacterClassEscape(state) ||
-    this.regexp_eatCharacterEscape(state) ||
-    (state.switchN && this.regexp_eatKGroupName(state))
-  ) {
-    return true
-  }
-  if (state.switchU) {
-    // Make the same message as V8.
-    if (state.current() === 0x63 /* c */) {
-      state.raise("Invalid unicode escape");
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape
+  pp$8.regexp_eatAtomEscape = function(state) {
+    if (
+      this.regexp_eatBackReference(state) ||
+      this.regexp_eatCharacterClassEscape(state) ||
+      this.regexp_eatCharacterEscape(state) ||
+      (state.switchN && this.regexp_eatKGroupName(state))
+    ) {
+      return true
     }
-    state.raise("Invalid escape");
-  }
-  return false
-};
-pp$9.regexp_eatBackReference = function(state) {
-  var start = state.pos;
-  if (this.regexp_eatDecimalEscape(state)) {
-    var n = state.lastIntValue;
     if (state.switchU) {
-      // For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape
-      if (n > state.maxBackReference) {
-        state.maxBackReference = n;
+      // Make the same message as V8.
+      if (state.current() === 0x63 /* c */) {
+        state.raise("Invalid unicode escape");
       }
-      return true
+      state.raise("Invalid escape");
     }
-    if (n <= state.numCapturingParens) {
-      return true
+    return false
+  };
+  pp$8.regexp_eatBackReference = function(state) {
+    var start = state.pos;
+    if (this.regexp_eatDecimalEscape(state)) {
+      var n = state.lastIntValue;
+      if (state.switchU) {
+        // For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape
+        if (n > state.maxBackReference) {
+          state.maxBackReference = n;
+        }
+        return true
+      }
+      if (n <= state.numCapturingParens) {
+        return true
+      }
+      state.pos = start;
     }
-    state.pos = start;
-  }
-  return false
-};
-pp$9.regexp_eatKGroupName = function(state) {
-  if (state.eat(0x6B /* k */)) {
-    if (this.regexp_eatGroupName(state)) {
-      state.backReferenceNames.push(state.lastStringValue);
-      return true
+    return false
+  };
+  pp$8.regexp_eatKGroupName = function(state) {
+    if (state.eat(0x6B /* k */)) {
+      if (this.regexp_eatGroupName(state)) {
+        state.backReferenceNames.push(state.lastStringValue);
+        return true
+      }
+      state.raise("Invalid named reference");
     }
-    state.raise("Invalid named reference");
-  }
-  return false
-};
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape
-pp$9.regexp_eatCharacterEscape = function(state) {
-  return (
-    this.regexp_eatControlEscape(state) ||
-    this.regexp_eatCControlLetter(state) ||
-    this.regexp_eatZero(state) ||
-    this.regexp_eatHexEscapeSequence(state) ||
-    this.regexp_eatRegExpUnicodeEscapeSequence(state) ||
-    (!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) ||
-    this.regexp_eatIdentityEscape(state)
-  )
-};
-pp$9.regexp_eatCControlLetter = function(state) {
-  var start = state.pos;
-  if (state.eat(0x63 /* c */)) {
-    if (this.regexp_eatControlLetter(state)) {
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape
+  pp$8.regexp_eatCharacterEscape = function(state) {
+    return (
+      this.regexp_eatControlEscape(state) ||
+      this.regexp_eatCControlLetter(state) ||
+      this.regexp_eatZero(state) ||
+      this.regexp_eatHexEscapeSequence(state) ||
+      this.regexp_eatRegExpUnicodeEscapeSequence(state) ||
+      (!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) ||
+      this.regexp_eatIdentityEscape(state)
+    )
+  };
+  pp$8.regexp_eatCControlLetter = function(state) {
+    var start = state.pos;
+    if (state.eat(0x63 /* c */)) {
+      if (this.regexp_eatControlLetter(state)) {
+        return true
+      }
+      state.pos = start;
+    }
+    return false
+  };
+  pp$8.regexp_eatZero = function(state) {
+    if (state.current() === 0x30 /* 0 */ && !isDecimalDigit(state.lookahead())) {
+      state.lastIntValue = 0;
+      state.advance();
       return true
     }
-    state.pos = start;
-  }
-  return false
-};
-pp$9.regexp_eatZero = function(state) {
-  if (state.current() === 0x30 /* 0 */ && !isDecimalDigit(state.lookahead())) {
-    state.lastIntValue = 0;
-    state.advance();
-    return true
-  }
-  return false
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape
-pp$9.regexp_eatControlEscape = function(state) {
-  var ch = state.current();
-  if (ch === 0x74 /* t */) {
-    state.lastIntValue = 0x09; /* \t */
-    state.advance();
-    return true
-  }
-  if (ch === 0x6E /* n */) {
-    state.lastIntValue = 0x0A; /* \n */
-    state.advance();
-    return true
-  }
-  if (ch === 0x76 /* v */) {
-    state.lastIntValue = 0x0B; /* \v */
-    state.advance();
-    return true
-  }
-  if (ch === 0x66 /* f */) {
-    state.lastIntValue = 0x0C; /* \f */
-    state.advance();
-    return true
-  }
-  if (ch === 0x72 /* r */) {
-    state.lastIntValue = 0x0D; /* \r */
-    state.advance();
-    return true
-  }
-  return false
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter
-pp$9.regexp_eatControlLetter = function(state) {
-  var ch = state.current();
-  if (isControlLetter(ch)) {
-    state.lastIntValue = ch % 0x20;
-    state.advance();
-    return true
-  }
-  return false
-};
-function isControlLetter(ch) {
-  return (
-    (ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) ||
-    (ch >= 0x61 /* a */ && ch <= 0x7A /* z */)
-  )
-}
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence
-pp$9.regexp_eatRegExpUnicodeEscapeSequence = function(state) {
-  var start = state.pos;
-
-  if (state.eat(0x75 /* u */)) {
-    if (this.regexp_eatFixedHexDigits(state, 4)) {
-      var lead = state.lastIntValue;
-      if (state.switchU && lead >= 0xD800 && lead <= 0xDBFF) {
-        var leadSurrogateEnd = state.pos;
-        if (state.eat(0x5C /* \ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) {
-          var trail = state.lastIntValue;
-          if (trail >= 0xDC00 && trail <= 0xDFFF) {
-            state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000;
-            return true
-          }
-        }
-        state.pos = leadSurrogateEnd;
-        state.lastIntValue = lead;
-      }
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape
+  pp$8.regexp_eatControlEscape = function(state) {
+    var ch = state.current();
+    if (ch === 0x74 /* t */) {
+      state.lastIntValue = 0x09; /* \t */
+      state.advance();
       return true
     }
-    if (
-      state.switchU &&
-      state.eat(0x7B /* { */) &&
-      this.regexp_eatHexDigits(state) &&
-      state.eat(0x7D /* } */) &&
-      isValidUnicode(state.lastIntValue)
-    ) {
+    if (ch === 0x6E /* n */) {
+      state.lastIntValue = 0x0A; /* \n */
+      state.advance();
       return true
     }
-    if (state.switchU) {
-      state.raise("Invalid unicode escape");
+    if (ch === 0x76 /* v */) {
+      state.lastIntValue = 0x0B; /* \v */
+      state.advance();
+      return true
     }
-    state.pos = start;
-  }
-
-  return false
-};
-function isValidUnicode(ch) {
-  return ch >= 0 && ch <= 0x10FFFF
-}
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape
-pp$9.regexp_eatIdentityEscape = function(state) {
-  if (state.switchU) {
-    if (this.regexp_eatSyntaxCharacter(state)) {
+    if (ch === 0x66 /* f */) {
+      state.lastIntValue = 0x0C; /* \f */
+      state.advance();
       return true
     }
-    if (state.eat(0x2F /* / */)) {
-      state.lastIntValue = 0x2F; /* / */
+    if (ch === 0x72 /* r */) {
+      state.lastIntValue = 0x0D; /* \r */
+      state.advance();
       return true
     }
     return false
-  }
+  };
 
-  var ch = state.current();
-  if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) {
-    state.lastIntValue = ch;
-    state.advance();
-    return true
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter
+  pp$8.regexp_eatControlLetter = function(state) {
+    var ch = state.current();
+    if (isControlLetter(ch)) {
+      state.lastIntValue = ch % 0x20;
+      state.advance();
+      return true
+    }
+    return false
+  };
+  function isControlLetter(ch) {
+    return (
+      (ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) ||
+      (ch >= 0x61 /* a */ && ch <= 0x7A /* z */)
+    )
+  }
+
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence
+  pp$8.regexp_eatRegExpUnicodeEscapeSequence = function(state) {
+    var start = state.pos;
+
+    if (state.eat(0x75 /* u */)) {
+      if (this.regexp_eatFixedHexDigits(state, 4)) {
+        var lead = state.lastIntValue;
+        if (state.switchU && lead >= 0xD800 && lead <= 0xDBFF) {
+          var leadSurrogateEnd = state.pos;
+          if (state.eat(0x5C /* \ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) {
+            var trail = state.lastIntValue;
+            if (trail >= 0xDC00 && trail <= 0xDFFF) {
+              state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000;
+              return true
+            }
+          }
+          state.pos = leadSurrogateEnd;
+          state.lastIntValue = lead;
+        }
+        return true
+      }
+      if (
+        state.switchU &&
+        state.eat(0x7B /* { */) &&
+        this.regexp_eatHexDigits(state) &&
+        state.eat(0x7D /* } */) &&
+        isValidUnicode(state.lastIntValue)
+      ) {
+        return true
+      }
+      if (state.switchU) {
+        state.raise("Invalid unicode escape");
+      }
+      state.pos = start;
+    }
+
+    return false
+  };
+  function isValidUnicode(ch) {
+    return ch >= 0 && ch <= 0x10FFFF
   }
 
-  return false
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape
+  pp$8.regexp_eatIdentityEscape = function(state) {
+    if (state.switchU) {
+      if (this.regexp_eatSyntaxCharacter(state)) {
+        return true
+      }
+      if (state.eat(0x2F /* / */)) {
+        state.lastIntValue = 0x2F; /* / */
+        return true
+      }
+      return false
+    }
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape
-pp$9.regexp_eatDecimalEscape = function(state) {
-  state.lastIntValue = 0;
-  var ch = state.current();
-  if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) {
-    do {
-      state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
+    var ch = state.current();
+    if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) {
+      state.lastIntValue = ch;
       state.advance();
-    } while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */)
-    return true
-  }
-  return false
-};
+      return true
+    }
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape
-pp$9.regexp_eatCharacterClassEscape = function(state) {
-  var ch = state.current();
+    return false
+  };
 
-  if (isCharacterClassEscape(ch)) {
-    state.lastIntValue = -1;
-    state.advance();
-    return true
-  }
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape
+  pp$8.regexp_eatDecimalEscape = function(state) {
+    state.lastIntValue = 0;
+    var ch = state.current();
+    if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) {
+      do {
+        state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
+        state.advance();
+      } while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */)
+      return true
+    }
+    return false
+  };
+
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape
+  pp$8.regexp_eatCharacterClassEscape = function(state) {
+    var ch = state.current();
+
+    if (isCharacterClassEscape(ch)) {
+      state.lastIntValue = -1;
+      state.advance();
+      return true
+    }
 
-  if (
-    state.switchU &&
-    this.options.ecmaVersion >= 9 &&
-    (ch === 0x50 /* P */ || ch === 0x70 /* p */)
-  ) {
-    state.lastIntValue = -1;
-    state.advance();
     if (
-      state.eat(0x7B /* { */) &&
-      this.regexp_eatUnicodePropertyValueExpression(state) &&
-      state.eat(0x7D /* } */)
+      state.switchU &&
+      this.options.ecmaVersion >= 9 &&
+      (ch === 0x50 /* P */ || ch === 0x70 /* p */)
     ) {
-      return true
+      state.lastIntValue = -1;
+      state.advance();
+      if (
+        state.eat(0x7B /* { */) &&
+        this.regexp_eatUnicodePropertyValueExpression(state) &&
+        state.eat(0x7D /* } */)
+      ) {
+        return true
+      }
+      state.raise("Invalid property name");
     }
-    state.raise("Invalid property name");
-  }
 
-  return false
-};
-function isCharacterClassEscape(ch) {
-  return (
-    ch === 0x64 /* d */ ||
-    ch === 0x44 /* D */ ||
-    ch === 0x73 /* s */ ||
-    ch === 0x53 /* S */ ||
-    ch === 0x77 /* w */ ||
-    ch === 0x57 /* W */
-  )
-}
+    return false
+  };
+  function isCharacterClassEscape(ch) {
+    return (
+      ch === 0x64 /* d */ ||
+      ch === 0x44 /* D */ ||
+      ch === 0x73 /* s */ ||
+      ch === 0x53 /* S */ ||
+      ch === 0x77 /* w */ ||
+      ch === 0x57 /* W */
+    )
+  }
+
+  // UnicodePropertyValueExpression ::
+  //   UnicodePropertyName `=` UnicodePropertyValue
+  //   LoneUnicodePropertyNameOrValue
+  pp$8.regexp_eatUnicodePropertyValueExpression = function(state) {
+    var start = state.pos;
+
+    // UnicodePropertyName `=` UnicodePropertyValue
+    if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) {
+      var name = state.lastStringValue;
+      if (this.regexp_eatUnicodePropertyValue(state)) {
+        var value = state.lastStringValue;
+        this.regexp_validateUnicodePropertyNameAndValue(state, name, value);
+        return true
+      }
+    }
+    state.pos = start;
 
-// UnicodePropertyValueExpression ::
-//   UnicodePropertyName `=` UnicodePropertyValue
-//   LoneUnicodePropertyNameOrValue
-pp$9.regexp_eatUnicodePropertyValueExpression = function(state) {
-  var start = state.pos;
-
-  // UnicodePropertyName `=` UnicodePropertyValue
-  if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) {
-    var name = state.lastStringValue;
-    if (this.regexp_eatUnicodePropertyValue(state)) {
-      var value = state.lastStringValue;
-      this.regexp_validateUnicodePropertyNameAndValue(state, name, value);
+    // LoneUnicodePropertyNameOrValue
+    if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) {
+      var nameOrValue = state.lastStringValue;
+      this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue);
       return true
     }
-  }
-  state.pos = start;
+    return false
+  };
+  pp$8.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) {
+    if (!has(state.unicodeProperties.nonBinary, name))
+      { state.raise("Invalid property name"); }
+    if (!state.unicodeProperties.nonBinary[name].test(value))
+      { state.raise("Invalid property value"); }
+  };
+  pp$8.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) {
+    if (!state.unicodeProperties.binary.test(nameOrValue))
+      { state.raise("Invalid property name"); }
+  };
 
-  // LoneUnicodePropertyNameOrValue
-  if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) {
-    var nameOrValue = state.lastStringValue;
-    this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue);
-    return true
+  // UnicodePropertyName ::
+  //   UnicodePropertyNameCharacters
+  pp$8.regexp_eatUnicodePropertyName = function(state) {
+    var ch = 0;
+    state.lastStringValue = "";
+    while (isUnicodePropertyNameCharacter(ch = state.current())) {
+      state.lastStringValue += codePointToString(ch);
+      state.advance();
+    }
+    return state.lastStringValue !== ""
+  };
+  function isUnicodePropertyNameCharacter(ch) {
+    return isControlLetter(ch) || ch === 0x5F /* _ */
   }
-  return false
-};
-pp$9.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) {
-  if (!has(state.unicodeProperties.nonBinary, name))
-    { state.raise("Invalid property name"); }
-  if (!state.unicodeProperties.nonBinary[name].test(value))
-    { state.raise("Invalid property value"); }
-};
-pp$9.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) {
-  if (!state.unicodeProperties.binary.test(nameOrValue))
-    { state.raise("Invalid property name"); }
-};
 
-// UnicodePropertyName ::
-//   UnicodePropertyNameCharacters
-pp$9.regexp_eatUnicodePropertyName = function(state) {
-  var ch = 0;
-  state.lastStringValue = "";
-  while (isUnicodePropertyNameCharacter(ch = state.current())) {
-    state.lastStringValue += codePointToString$1(ch);
-    state.advance();
+  // UnicodePropertyValue ::
+  //   UnicodePropertyValueCharacters
+  pp$8.regexp_eatUnicodePropertyValue = function(state) {
+    var ch = 0;
+    state.lastStringValue = "";
+    while (isUnicodePropertyValueCharacter(ch = state.current())) {
+      state.lastStringValue += codePointToString(ch);
+      state.advance();
+    }
+    return state.lastStringValue !== ""
+  };
+  function isUnicodePropertyValueCharacter(ch) {
+    return isUnicodePropertyNameCharacter(ch) || isDecimalDigit(ch)
   }
-  return state.lastStringValue !== ""
-};
-function isUnicodePropertyNameCharacter(ch) {
-  return isControlLetter(ch) || ch === 0x5F /* _ */
-}
 
-// UnicodePropertyValue ::
-//   UnicodePropertyValueCharacters
-pp$9.regexp_eatUnicodePropertyValue = function(state) {
-  var ch = 0;
-  state.lastStringValue = "";
-  while (isUnicodePropertyValueCharacter(ch = state.current())) {
-    state.lastStringValue += codePointToString$1(ch);
-    state.advance();
-  }
-  return state.lastStringValue !== ""
-};
-function isUnicodePropertyValueCharacter(ch) {
-  return isUnicodePropertyNameCharacter(ch) || isDecimalDigit(ch)
-}
+  // LoneUnicodePropertyNameOrValue ::
+  //   UnicodePropertyValueCharacters
+  pp$8.regexp_eatLoneUnicodePropertyNameOrValue = function(state) {
+    return this.regexp_eatUnicodePropertyValue(state)
+  };
 
-// LoneUnicodePropertyNameOrValue ::
-//   UnicodePropertyValueCharacters
-pp$9.regexp_eatLoneUnicodePropertyNameOrValue = function(state) {
-  return this.regexp_eatUnicodePropertyValue(state)
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass
+  pp$8.regexp_eatCharacterClass = function(state) {
+    if (state.eat(0x5B /* [ */)) {
+      state.eat(0x5E /* ^ */);
+      this.regexp_classRanges(state);
+      if (state.eat(0x5D /* ] */)) {
+        return true
+      }
+      // Unreachable since it threw "unterminated regular expression" error before.
+      state.raise("Unterminated character class");
+    }
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass
-pp$9.regexp_eatCharacterClass = function(state) {
-  if (state.eat(0x5B /* [ */)) {
-    state.eat(0x5E /* ^ */);
-    this.regexp_classRanges(state);
-    if (state.eat(0x5D /* [ */)) {
-      return true
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash
+  pp$8.regexp_classRanges = function(state) {
+    while (this.regexp_eatClassAtom(state)) {
+      var left = state.lastIntValue;
+      if (state.eat(0x2D /* - */) && this.regexp_eatClassAtom(state)) {
+        var right = state.lastIntValue;
+        if (state.switchU && (left === -1 || right === -1)) {
+          state.raise("Invalid character class");
+        }
+        if (left !== -1 && right !== -1 && left > right) {
+          state.raise("Range out of order in character class");
+        }
+      }
     }
-    // Unreachable since it threw "unterminated regular expression" error before.
-    state.raise("Unterminated character class");
-  }
-  return false
-};
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges
-// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges
-// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash
-pp$9.regexp_classRanges = function(state) {
-  var this$1 = this;
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash
+  pp$8.regexp_eatClassAtom = function(state) {
+    var start = state.pos;
 
-  while (this.regexp_eatClassAtom(state)) {
-    var left = state.lastIntValue;
-    if (state.eat(0x2D /* - */) && this$1.regexp_eatClassAtom(state)) {
-      var right = state.lastIntValue;
-      if (state.switchU && (left === -1 || right === -1)) {
-        state.raise("Invalid character class");
+    if (state.eat(0x5C /* \ */)) {
+      if (this.regexp_eatClassEscape(state)) {
+        return true
       }
-      if (left !== -1 && right !== -1 && left > right) {
-        state.raise("Range out of order in character class");
+      if (state.switchU) {
+        // Make the same message as V8.
+        var ch$1 = state.current();
+        if (ch$1 === 0x63 /* c */ || isOctalDigit(ch$1)) {
+          state.raise("Invalid class escape");
+        }
+        state.raise("Invalid escape");
       }
+      state.pos = start;
     }
-  }
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom
-// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash
-pp$9.regexp_eatClassAtom = function(state) {
-  var start = state.pos;
 
-  if (state.eat(0x5C /* \ */)) {
-    if (this.regexp_eatClassEscape(state)) {
+    var ch = state.current();
+    if (ch !== 0x5D /* ] */) {
+      state.lastIntValue = ch;
+      state.advance();
       return true
     }
-    if (state.switchU) {
-      // Make the same message as V8.
-      var ch$1 = state.current();
-      if (ch$1 === 0x63 /* c */ || isOctalDigit(ch$1)) {
-        state.raise("Invalid class escape");
-      }
-      state.raise("Invalid escape");
-    }
-    state.pos = start;
-  }
 
-  var ch = state.current();
-  if (ch !== 0x5D /* [ */) {
-    state.lastIntValue = ch;
-    state.advance();
-    return true
-  }
-
-  return false
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape
-pp$9.regexp_eatClassEscape = function(state) {
-  var start = state.pos;
+    return false
+  };
 
-  if (state.eat(0x62 /* b */)) {
-    state.lastIntValue = 0x08; /* <BS> */
-    return true
-  }
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape
+  pp$8.regexp_eatClassEscape = function(state) {
+    var start = state.pos;
 
-  if (state.switchU && state.eat(0x2D /* - */)) {
-    state.lastIntValue = 0x2D; /* - */
-    return true
-  }
+    if (state.eat(0x62 /* b */)) {
+      state.lastIntValue = 0x08; /* <BS> */
+      return true
+    }
 
-  if (!state.switchU && state.eat(0x63 /* c */)) {
-    if (this.regexp_eatClassControlLetter(state)) {
+    if (state.switchU && state.eat(0x2D /* - */)) {
+      state.lastIntValue = 0x2D; /* - */
       return true
     }
-    state.pos = start;
-  }
 
-  return (
-    this.regexp_eatCharacterClassEscape(state) ||
-    this.regexp_eatCharacterEscape(state)
-  )
-};
+    if (!state.switchU && state.eat(0x63 /* c */)) {
+      if (this.regexp_eatClassControlLetter(state)) {
+        return true
+      }
+      state.pos = start;
+    }
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter
-pp$9.regexp_eatClassControlLetter = function(state) {
-  var ch = state.current();
-  if (isDecimalDigit(ch) || ch === 0x5F /* _ */) {
-    state.lastIntValue = ch % 0x20;
-    state.advance();
-    return true
-  }
-  return false
-};
+    return (
+      this.regexp_eatCharacterClassEscape(state) ||
+      this.regexp_eatCharacterEscape(state)
+    )
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
-pp$9.regexp_eatHexEscapeSequence = function(state) {
-  var start = state.pos;
-  if (state.eat(0x78 /* x */)) {
-    if (this.regexp_eatFixedHexDigits(state, 2)) {
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter
+  pp$8.regexp_eatClassControlLetter = function(state) {
+    var ch = state.current();
+    if (isDecimalDigit(ch) || ch === 0x5F /* _ */) {
+      state.lastIntValue = ch % 0x20;
+      state.advance();
       return true
     }
-    if (state.switchU) {
-      state.raise("Invalid escape");
+    return false
+  };
+
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
+  pp$8.regexp_eatHexEscapeSequence = function(state) {
+    var start = state.pos;
+    if (state.eat(0x78 /* x */)) {
+      if (this.regexp_eatFixedHexDigits(state, 2)) {
+        return true
+      }
+      if (state.switchU) {
+        state.raise("Invalid escape");
+      }
+      state.pos = start;
     }
-    state.pos = start;
-  }
-  return false
-};
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits
-pp$9.regexp_eatDecimalDigits = function(state) {
-  var start = state.pos;
-  var ch = 0;
-  state.lastIntValue = 0;
-  while (isDecimalDigit(ch = state.current())) {
-    state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
-    state.advance();
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits
+  pp$8.regexp_eatDecimalDigits = function(state) {
+    var start = state.pos;
+    var ch = 0;
+    state.lastIntValue = 0;
+    while (isDecimalDigit(ch = state.current())) {
+      state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
+      state.advance();
+    }
+    return state.pos !== start
+  };
+  function isDecimalDigit(ch) {
+    return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */
   }
-  return state.pos !== start
-};
-function isDecimalDigit(ch) {
-  return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */
-}
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits
-pp$9.regexp_eatHexDigits = function(state) {
-  var start = state.pos;
-  var ch = 0;
-  state.lastIntValue = 0;
-  while (isHexDigit(ch = state.current())) {
-    state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch);
-    state.advance();
-  }
-  return state.pos !== start
-};
-function isHexDigit(ch) {
-  return (
-    (ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) ||
-    (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) ||
-    (ch >= 0x61 /* a */ && ch <= 0x66 /* f */)
-  )
-}
-function hexToInt(ch) {
-  if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) {
-    return 10 + (ch - 0x41 /* A */)
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits
+  pp$8.regexp_eatHexDigits = function(state) {
+    var start = state.pos;
+    var ch = 0;
+    state.lastIntValue = 0;
+    while (isHexDigit(ch = state.current())) {
+      state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch);
+      state.advance();
+    }
+    return state.pos !== start
+  };
+  function isHexDigit(ch) {
+    return (
+      (ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) ||
+      (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) ||
+      (ch >= 0x61 /* a */ && ch <= 0x66 /* f */)
+    )
   }
-  if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) {
-    return 10 + (ch - 0x61 /* a */)
+  function hexToInt(ch) {
+    if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) {
+      return 10 + (ch - 0x41 /* A */)
+    }
+    if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) {
+      return 10 + (ch - 0x61 /* a */)
+    }
+    return ch - 0x30 /* 0 */
   }
-  return ch - 0x30 /* 0 */
-}
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence
-// Allows only 0-377(octal) i.e. 0-255(decimal).
-pp$9.regexp_eatLegacyOctalEscapeSequence = function(state) {
-  if (this.regexp_eatOctalDigit(state)) {
-    var n1 = state.lastIntValue;
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence
+  // Allows only 0-377(octal) i.e. 0-255(decimal).
+  pp$8.regexp_eatLegacyOctalEscapeSequence = function(state) {
     if (this.regexp_eatOctalDigit(state)) {
-      var n2 = state.lastIntValue;
-      if (n1 <= 3 && this.regexp_eatOctalDigit(state)) {
-        state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue;
+      var n1 = state.lastIntValue;
+      if (this.regexp_eatOctalDigit(state)) {
+        var n2 = state.lastIntValue;
+        if (n1 <= 3 && this.regexp_eatOctalDigit(state)) {
+          state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue;
+        } else {
+          state.lastIntValue = n1 * 8 + n2;
+        }
       } else {
-        state.lastIntValue = n1 * 8 + n2;
+        state.lastIntValue = n1;
       }
-    } else {
-      state.lastIntValue = n1;
+      return true
     }
-    return true
-  }
-  return false
-};
-
-// https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit
-pp$9.regexp_eatOctalDigit = function(state) {
-  var ch = state.current();
-  if (isOctalDigit(ch)) {
-    state.lastIntValue = ch - 0x30; /* 0 */
-    state.advance();
-    return true
-  }
-  state.lastIntValue = 0;
-  return false
-};
-function isOctalDigit(ch) {
-  return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */
-}
+    return false
+  };
 
-// https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits
-// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit
-// And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
-pp$9.regexp_eatFixedHexDigits = function(state, length) {
-  var start = state.pos;
-  state.lastIntValue = 0;
-  for (var i = 0; i < length; ++i) {
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit
+  pp$8.regexp_eatOctalDigit = function(state) {
     var ch = state.current();
-    if (!isHexDigit(ch)) {
-      state.pos = start;
-      return false
+    if (isOctalDigit(ch)) {
+      state.lastIntValue = ch - 0x30; /* 0 */
+      state.advance();
+      return true
     }
-    state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch);
-    state.advance();
+    state.lastIntValue = 0;
+    return false
+  };
+  function isOctalDigit(ch) {
+    return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */
   }
-  return true
-};
 
-// Object type used to represent tokens. Note that normally, tokens
-// simply exist as properties on the parser object. This is only
-// used for the onToken callback and the external tokenizer.
-
-var Token = function Token(p) {
-  this.type = p.type;
-  this.value = p.value;
-  this.start = p.start;
-  this.end = p.end;
-  if (p.options.locations)
-    { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); }
-  if (p.options.ranges)
-    { this.range = [p.start, p.end]; }
-};
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits
+  // https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit
+  // And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
+  pp$8.regexp_eatFixedHexDigits = function(state, length) {
+    var start = state.pos;
+    state.lastIntValue = 0;
+    for (var i = 0; i < length; ++i) {
+      var ch = state.current();
+      if (!isHexDigit(ch)) {
+        state.pos = start;
+        return false
+      }
+      state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch);
+      state.advance();
+    }
+    return true
+  };
 
-// ## Tokenizer
+  // Object type used to represent tokens. Note that normally, tokens
+  // simply exist as properties on the parser object. This is only
+  // used for the onToken callback and the external tokenizer.
+
+  var Token = function Token(p) {
+    this.type = p.type;
+    this.value = p.value;
+    this.start = p.start;
+    this.end = p.end;
+    if (p.options.locations)
+      { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); }
+    if (p.options.ranges)
+      { this.range = [p.start, p.end]; }
+  };
 
-var pp$8 = Parser.prototype;
+  // ## Tokenizer
 
-// Move to the next token
+  var pp$9 = Parser.prototype;
 
-pp$8.next = function() {
-  if (this.options.onToken)
-    { this.options.onToken(new Token(this)); }
+  // Move to the next token
 
-  this.lastTokEnd = this.end;
-  this.lastTokStart = this.start;
-  this.lastTokEndLoc = this.endLoc;
-  this.lastTokStartLoc = this.startLoc;
-  this.nextToken();
-};
+  pp$9.next = function(ignoreEscapeSequenceInKeyword) {
+    if (!ignoreEscapeSequenceInKeyword && this.type.keyword && this.containsEsc)
+      { this.raiseRecoverable(this.start, "Escape sequence in keyword " + this.type.keyword); }
+    if (this.options.onToken)
+      { this.options.onToken(new Token(this)); }
 
-pp$8.getToken = function() {
-  this.next();
-  return new Token(this)
-};
+    this.lastTokEnd = this.end;
+    this.lastTokStart = this.start;
+    this.lastTokEndLoc = this.endLoc;
+    this.lastTokStartLoc = this.startLoc;
+    this.nextToken();
+  };
 
-// If we're in an ES6 environment, make parsers iterable
-if (typeof Symbol !== "undefined")
-  { pp$8[Symbol.iterator] = function() {
-    var this$1 = this;
+  pp$9.getToken = function() {
+    this.next();
+    return new Token(this)
+  };
 
-    return {
-      next: function () {
-        var token = this$1.getToken();
-        return {
-          done: token.type === types.eof,
-          value: token
+  // If we're in an ES6 environment, make parsers iterable
+  if (typeof Symbol !== "undefined")
+    { pp$9[Symbol.iterator] = function() {
+      var this$1 = this;
+
+      return {
+        next: function () {
+          var token = this$1.getToken();
+          return {
+            done: token.type === types.eof,
+            value: token
+          }
         }
       }
-    }
-  }; }
+    }; }
 
-// Toggle strict mode. Re-reads the next number or string to please
-// pedantic tests (`"use strict"; 010;` should fail).
-
-pp$8.curContext = function() {
-  return this.context[this.context.length - 1]
-};
+  // Toggle strict mode. Re-reads the next number or string to please
+  // pedantic tests (`"use strict"; 010;` should fail).
 
-// Read a single token, updating the parser object's token-related
-// properties.
+  pp$9.curContext = function() {
+    return this.context[this.context.length - 1]
+  };
 
-pp$8.nextToken = function() {
-  var curContext = this.curContext();
-  if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }
+  // Read a single token, updating the parser object's token-related
+  // properties.
 
-  this.start = this.pos;
-  if (this.options.locations) { this.startLoc = this.curPosition(); }
-  if (this.pos >= this.input.length) { return this.finishToken(types.eof) }
+  pp$9.nextToken = function() {
+    var curContext = this.curContext();
+    if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }
 
-  if (curContext.override) { return curContext.override(this) }
-  else { this.readToken(this.fullCharCodeAtPos()); }
-};
+    this.start = this.pos;
+    if (this.options.locations) { this.startLoc = this.curPosition(); }
+    if (this.pos >= this.input.length) { return this.finishToken(types.eof) }
 
-pp$8.readToken = function(code) {
-  // Identifier or keyword. '\uXXXX' sequences are allowed in
-  // identifiers, so '\' also dispatches to that.
-  if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
-    { return this.readWord() }
+    if (curContext.override) { return curContext.override(this) }
+    else { this.readToken(this.fullCharCodeAtPos()); }
+  };
 
-  return this.getTokenFromCode(code)
-};
+  pp$9.readToken = function(code) {
+    // Identifier or keyword. '\uXXXX' sequences are allowed in
+    // identifiers, so '\' also dispatches to that.
+    if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
+      { return this.readWord() }
 
-pp$8.fullCharCodeAtPos = function() {
-  var code = this.input.charCodeAt(this.pos);
-  if (code <= 0xd7ff || code >= 0xe000) { return code }
-  var next = this.input.charCodeAt(this.pos + 1);
-  return (code << 10) + next - 0x35fdc00
-};
+    return this.getTokenFromCode(code)
+  };
 
-pp$8.skipBlockComment = function() {
-  var this$1 = this;
+  pp$9.fullCharCodeAtPos = function() {
+    var code = this.input.charCodeAt(this.pos);
+    if (code <= 0xd7ff || code >= 0xe000) { return code }
+    var next = this.input.charCodeAt(this.pos + 1);
+    return (code << 10) + next - 0x35fdc00
+  };
 
-  var startLoc = this.options.onComment && this.curPosition();
-  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
-  if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
-  this.pos = end + 2;
-  if (this.options.locations) {
-    lineBreakG.lastIndex = start;
-    var match;
-    while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
-      ++this$1.curLine;
-      this$1.lineStart = match.index + match[0].length;
+  pp$9.skipBlockComment = function() {
+    var startLoc = this.options.onComment && this.curPosition();
+    var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
+    if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
+    this.pos = end + 2;
+    if (this.options.locations) {
+      lineBreakG.lastIndex = start;
+      var match;
+      while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
+        ++this.curLine;
+        this.lineStart = match.index + match[0].length;
+      }
     }
-  }
-  if (this.options.onComment)
-    { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
-                           startLoc, this.curPosition()); }
-};
-
-pp$8.skipLineComment = function(startSkip) {
-  var this$1 = this;
-
-  var start = this.pos;
-  var startLoc = this.options.onComment && this.curPosition();
-  var ch = this.input.charCodeAt(this.pos += startSkip);
-  while (this.pos < this.input.length && !isNewLine(ch)) {
-    ch = this$1.input.charCodeAt(++this$1.pos);
-  }
-  if (this.options.onComment)
-    { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
-                           startLoc, this.curPosition()); }
-};
+    if (this.options.onComment)
+      { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
+                             startLoc, this.curPosition()); }
+  };
 
-// Called at the start of the parse and after every token. Skips
-// whitespace and comments, and.
+  pp$9.skipLineComment = function(startSkip) {
+    var start = this.pos;
+    var startLoc = this.options.onComment && this.curPosition();
+    var ch = this.input.charCodeAt(this.pos += startSkip);
+    while (this.pos < this.input.length && !isNewLine(ch)) {
+      ch = this.input.charCodeAt(++this.pos);
+    }
+    if (this.options.onComment)
+      { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
+                             startLoc, this.curPosition()); }
+  };
 
-pp$8.skipSpace = function() {
-  var this$1 = this;
+  // Called at the start of the parse and after every token. Skips
+  // whitespace and comments, and.
 
-  loop: while (this.pos < this.input.length) {
-    var ch = this$1.input.charCodeAt(this$1.pos);
-    switch (ch) {
-    case 32: case 160: // ' '
-      ++this$1.pos;
-      break
-    case 13:
-      if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
-        ++this$1.pos;
-      }
-    case 10: case 8232: case 8233:
-      ++this$1.pos;
-      if (this$1.options.locations) {
-        ++this$1.curLine;
-        this$1.lineStart = this$1.pos;
-      }
-      break
-    case 47: // '/'
-      switch (this$1.input.charCodeAt(this$1.pos + 1)) {
-      case 42: // '*'
-        this$1.skipBlockComment();
+  pp$9.skipSpace = function() {
+    loop: while (this.pos < this.input.length) {
+      var ch = this.input.charCodeAt(this.pos);
+      switch (ch) {
+      case 32: case 160: // ' '
+        ++this.pos;
+        break
+      case 13:
+        if (this.input.charCodeAt(this.pos + 1) === 10) {
+          ++this.pos;
+        }
+      case 10: case 8232: case 8233:
+        ++this.pos;
+        if (this.options.locations) {
+          ++this.curLine;
+          this.lineStart = this.pos;
+        }
         break
-      case 47:
-        this$1.skipLineComment(2);
+      case 47: // '/'
+        switch (this.input.charCodeAt(this.pos + 1)) {
+        case 42: // '*'
+          this.skipBlockComment();
+          break
+        case 47:
+          this.skipLineComment(2);
+          break
+        default:
+          break loop
+        }
         break
       default:
-        break loop
-      }
-      break
-    default:
-      if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
-        ++this$1.pos;
-      } else {
-        break loop
+        if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
+          ++this.pos;
+        } else {
+          break loop
+        }
       }
     }
-  }
-};
+  };
 
-// Called at the end of every token. Sets `end`, `val`, and
-// maintains `context` and `exprAllowed`, and skips the space after
-// the token, so that the next one's `start` will point at the
-// right position.
+  // Called at the end of every token. Sets `end`, `val`, and
+  // maintains `context` and `exprAllowed`, and skips the space after
+  // the token, so that the next one's `start` will point at the
+  // right position.
 
-pp$8.finishToken = function(type, val) {
-  this.end = this.pos;
-  if (this.options.locations) { this.endLoc = this.curPosition(); }
-  var prevType = this.type;
-  this.type = type;
-  this.value = val;
+  pp$9.finishToken = function(type, val) {
+    this.end = this.pos;
+    if (this.options.locations) { this.endLoc = this.curPosition(); }
+    var prevType = this.type;
+    this.type = type;
+    this.value = val;
 
-  this.updateContext(prevType);
-};
+    this.updateContext(prevType);
+  };
 
-// ### Token reading
-
-// This is the function that is called to fetch the next token. It
-// is somewhat obscure, because it works in character codes rather
-// than characters, and because operator parsing has been inlined
-// into it.
-//
-// All in the name of speed.
-//
-pp$8.readToken_dot = function() {
-  var next = this.input.charCodeAt(this.pos + 1);
-  if (next >= 48 && next <= 57) { return this.readNumber(true) }
-  var next2 = this.input.charCodeAt(this.pos + 2);
-  if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
-    this.pos += 3;
-    return this.finishToken(types.ellipsis)
-  } else {
-    ++this.pos;
-    return this.finishToken(types.dot)
-  }
-};
+  // ### Token reading
 
-pp$8.readToken_slash = function() { // '/'
-  var next = this.input.charCodeAt(this.pos + 1);
-  if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
-  if (next === 61) { return this.finishOp(types.assign, 2) }
-  return this.finishOp(types.slash, 1)
-};
+  // This is the function that is called to fetch the next token. It
+  // is somewhat obscure, because it works in character codes rather
+  // than characters, and because operator parsing has been inlined
+  // into it.
+  //
+  // All in the name of speed.
+  //
+  pp$9.readToken_dot = function() {
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next >= 48 && next <= 57) { return this.readNumber(true) }
+    var next2 = this.input.charCodeAt(this.pos + 2);
+    if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
+      this.pos += 3;
+      return this.finishToken(types.ellipsis)
+    } else {
+      ++this.pos;
+      return this.finishToken(types.dot)
+    }
+  };
 
-pp$8.readToken_mult_modulo_exp = function(code) { // '%*'
-  var next = this.input.charCodeAt(this.pos + 1);
-  var size = 1;
-  var tokentype = code === 42 ? types.star : types.modulo;
+  pp$9.readToken_slash = function() { // '/'
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
+    if (next === 61) { return this.finishOp(types.assign, 2) }
+    return this.finishOp(types.slash, 1)
+  };
 
-  // exponentiation operator ** and **=
-  if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) {
-    ++size;
-    tokentype = types.starstar;
-    next = this.input.charCodeAt(this.pos + 2);
-  }
+  pp$9.readToken_mult_modulo_exp = function(code) { // '%*'
+    var next = this.input.charCodeAt(this.pos + 1);
+    var size = 1;
+    var tokentype = code === 42 ? types.star : types.modulo;
 
-  if (next === 61) { return this.finishOp(types.assign, size + 1) }
-  return this.finishOp(tokentype, size)
-};
+    // exponentiation operator ** and **=
+    if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) {
+      ++size;
+      tokentype = types.starstar;
+      next = this.input.charCodeAt(this.pos + 2);
+    }
 
-pp$8.readToken_pipe_amp = function(code) { // '|&'
-  var next = this.input.charCodeAt(this.pos + 1);
-  if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) }
-  if (next === 61) { return this.finishOp(types.assign, 2) }
-  return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
-};
+    if (next === 61) { return this.finishOp(types.assign, size + 1) }
+    return this.finishOp(tokentype, size)
+  };
 
-pp$8.readToken_caret = function() { // '^'
-  var next = this.input.charCodeAt(this.pos + 1);
-  if (next === 61) { return this.finishOp(types.assign, 2) }
-  return this.finishOp(types.bitwiseXOR, 1)
-};
+  pp$9.readToken_pipe_amp = function(code) { // '|&'
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) }
+    if (next === 61) { return this.finishOp(types.assign, 2) }
+    return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
+  };
+
+  pp$9.readToken_caret = function() { // '^'
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next === 61) { return this.finishOp(types.assign, 2) }
+    return this.finishOp(types.bitwiseXOR, 1)
+  };
+
+  pp$9.readToken_plus_min = function(code) { // '+-'
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next === code) {
+      if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 &&
+          (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
+        // A `-->` line comment
+        this.skipLineComment(3);
+        this.skipSpace();
+        return this.nextToken()
+      }
+      return this.finishOp(types.incDec, 2)
+    }
+    if (next === 61) { return this.finishOp(types.assign, 2) }
+    return this.finishOp(types.plusMin, 1)
+  };
 
-pp$8.readToken_plus_min = function(code) { // '+-'
-  var next = this.input.charCodeAt(this.pos + 1);
-  if (next === code) {
-    if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 &&
-        (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
-      // A `-->` line comment
-      this.skipLineComment(3);
+  pp$9.readToken_lt_gt = function(code) { // '<>'
+    var next = this.input.charCodeAt(this.pos + 1);
+    var size = 1;
+    if (next === code) {
+      size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
+      if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) }
+      return this.finishOp(types.bitShift, size)
+    }
+    if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 &&
+        this.input.charCodeAt(this.pos + 3) === 45) {
+      // `<!--`, an XML-style comment that should be interpreted as a line comment
+      this.skipLineComment(4);
       this.skipSpace();
       return this.nextToken()
     }
-    return this.finishOp(types.incDec, 2)
-  }
-  if (next === 61) { return this.finishOp(types.assign, 2) }
-  return this.finishOp(types.plusMin, 1)
-};
-
-pp$8.readToken_lt_gt = function(code) { // '<>'
-  var next = this.input.charCodeAt(this.pos + 1);
-  var size = 1;
-  if (next === code) {
-    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
-    if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) }
-    return this.finishOp(types.bitShift, size)
-  }
-  if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 &&
-      this.input.charCodeAt(this.pos + 3) === 45) {
-    // `<!--`, an XML-style comment that should be interpreted as a line comment
-    this.skipLineComment(4);
-    this.skipSpace();
-    return this.nextToken()
-  }
-  if (next === 61) { size = 2; }
-  return this.finishOp(types.relational, size)
-};
-
-pp$8.readToken_eq_excl = function(code) { // '=!'
-  var next = this.input.charCodeAt(this.pos + 1);
-  if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) }
-  if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
-    this.pos += 2;
-    return this.finishToken(types.arrow)
-  }
-  return this.finishOp(code === 61 ? types.eq : types.prefix, 1)
-};
-
-pp$8.getTokenFromCode = function(code) {
-  switch (code) {
-  // The interpretation of a dot depends on whether it is followed
-  // by a digit or another two dots.
-  case 46: // '.'
-    return this.readToken_dot()
-
-  // Punctuation tokens.
-  case 40: ++this.pos; return this.finishToken(types.parenL)
-  case 41: ++this.pos; return this.finishToken(types.parenR)
-  case 59: ++this.pos; return this.finishToken(types.semi)
-  case 44: ++this.pos; return this.finishToken(types.comma)
-  case 91: ++this.pos; return this.finishToken(types.bracketL)
-  case 93: ++this.pos; return this.finishToken(types.bracketR)
-  case 123: ++this.pos; return this.finishToken(types.braceL)
-  case 125: ++this.pos; return this.finishToken(types.braceR)
-  case 58: ++this.pos; return this.finishToken(types.colon)
-  case 63: ++this.pos; return this.finishToken(types.question)
-
-  case 96: // '`'
-    if (this.options.ecmaVersion < 6) { break }
-    ++this.pos;
-    return this.finishToken(types.backQuote)
+    if (next === 61) { size = 2; }
+    return this.finishOp(types.relational, size)
+  };
 
-  case 48: // '0'
+  pp$9.readToken_eq_excl = function(code) { // '=!'
     var next = this.input.charCodeAt(this.pos + 1);
-    if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number
-    if (this.options.ecmaVersion >= 6) {
-      if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number
-      if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number
+    if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) }
+    if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
+      this.pos += 2;
+      return this.finishToken(types.arrow)
     }
+    return this.finishOp(code === 61 ? types.eq : types.prefix, 1)
+  };
 
-  // Anything else beginning with a digit is an integer, octal
-  // number, or float.
-  case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
-    return this.readNumber(false)
+  pp$9.getTokenFromCode = function(code) {
+    switch (code) {
+    // The interpretation of a dot depends on whether it is followed
+    // by a digit or another two dots.
+    case 46: // '.'
+      return this.readToken_dot()
+
+    // Punctuation tokens.
+    case 40: ++this.pos; return this.finishToken(types.parenL)
+    case 41: ++this.pos; return this.finishToken(types.parenR)
+    case 59: ++this.pos; return this.finishToken(types.semi)
+    case 44: ++this.pos; return this.finishToken(types.comma)
+    case 91: ++this.pos; return this.finishToken(types.bracketL)
+    case 93: ++this.pos; return this.finishToken(types.bracketR)
+    case 123: ++this.pos; return this.finishToken(types.braceL)
+    case 125: ++this.pos; return this.finishToken(types.braceR)
+    case 58: ++this.pos; return this.finishToken(types.colon)
+    case 63: ++this.pos; return this.finishToken(types.question)
+
+    case 96: // '`'
+      if (this.options.ecmaVersion < 6) { break }
+      ++this.pos;
+      return this.finishToken(types.backQuote)
+
+    case 48: // '0'
+      var next = this.input.charCodeAt(this.pos + 1);
+      if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number
+      if (this.options.ecmaVersion >= 6) {
+        if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number
+        if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number
+      }
 
-  // Quotes produce strings.
-  case 34: case 39: // '"', "'"
-    return this.readString(code)
+    // Anything else beginning with a digit is an integer, octal
+    // number, or float.
+    case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
+      return this.readNumber(false)
 
-  // Operators are parsed inline in tiny state machines. '=' (61) is
-  // often referred to. `finishOp` simply skips the amount of
-  // characters it is given as second argument, and returns a token
-  // of the type given by its first argument.
+    // Quotes produce strings.
+    case 34: case 39: // '"', "'"
+      return this.readString(code)
 
-  case 47: // '/'
-    return this.readToken_slash()
+    // Operators are parsed inline in tiny state machines. '=' (61) is
+    // often referred to. `finishOp` simply skips the amount of
+    // characters it is given as second argument, and returns a token
+    // of the type given by its first argument.
 
-  case 37: case 42: // '%*'
-    return this.readToken_mult_modulo_exp(code)
+    case 47: // '/'
+      return this.readToken_slash()
 
-  case 124: case 38: // '|&'
-    return this.readToken_pipe_amp(code)
+    case 37: case 42: // '%*'
+      return this.readToken_mult_modulo_exp(code)
 
-  case 94: // '^'
-    return this.readToken_caret()
+    case 124: case 38: // '|&'
+      return this.readToken_pipe_amp(code)
 
-  case 43: case 45: // '+-'
-    return this.readToken_plus_min(code)
+    case 94: // '^'
+      return this.readToken_caret()
 
-  case 60: case 62: // '<>'
-    return this.readToken_lt_gt(code)
+    case 43: case 45: // '+-'
+      return this.readToken_plus_min(code)
 
-  case 61: case 33: // '=!'
-    return this.readToken_eq_excl(code)
+    case 60: case 62: // '<>'
+      return this.readToken_lt_gt(code)
 
-  case 126: // '~'
-    return this.finishOp(types.prefix, 1)
-  }
+    case 61: case 33: // '=!'
+      return this.readToken_eq_excl(code)
 
-  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'");
-};
+    case 126: // '~'
+      return this.finishOp(types.prefix, 1)
+    }
 
-pp$8.finishOp = function(type, size) {
-  var str = this.input.slice(this.pos, this.pos + size);
-  this.pos += size;
-  return this.finishToken(type, str)
-};
+    this.raise(this.pos, "Unexpected character '" + codePointToString$1(code) + "'");
+  };
 
-pp$8.readRegexp = function() {
-  var this$1 = this;
-
-  var escaped, inClass, start = this.pos;
-  for (;;) {
-    if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); }
-    var ch = this$1.input.charAt(this$1.pos);
-    if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); }
-    if (!escaped) {
-      if (ch === "[") { inClass = true; }
-      else if (ch === "]" && inClass) { inClass = false; }
-      else if (ch === "/" && !inClass) { break }
-      escaped = ch === "\\";
-    } else { escaped = false; }
-    ++this$1.pos;
-  }
-  var pattern = this.input.slice(start, this.pos);
-  ++this.pos;
-  var flagsStart = this.pos;
-  var flags = this.readWord1();
-  if (this.containsEsc) { this.unexpected(flagsStart); }
-
-  // Validate pattern
-  var state = this.regexpState || (this.regexpState = new RegExpValidationState(this));
-  state.reset(start, pattern, flags);
-  this.validateRegExpFlags(state);
-  this.validateRegExpPattern(state);
-
-  // Create Literal#value property value.
-  var value = null;
-  try {
-    value = new RegExp(pattern, flags);
-  } catch (e) {
-    // ESTree requires null if it failed to instantiate RegExp object.
-    // https://github.com/estree/estree/blob/a27003adf4fd7bfad44de9cef372a2eacd527b1c/es5.md#regexpliteral
-  }
+  pp$9.finishOp = function(type, size) {
+    var str = this.input.slice(this.pos, this.pos + size);
+    this.pos += size;
+    return this.finishToken(type, str)
+  };
 
-  return this.finishToken(types.regexp, {pattern: pattern, flags: flags, value: value})
-};
+  pp$9.readRegexp = function() {
+    var escaped, inClass, start = this.pos;
+    for (;;) {
+      if (this.pos >= this.input.length) { this.raise(start, "Unterminated regular expression"); }
+      var ch = this.input.charAt(this.pos);
+      if (lineBreak.test(ch)) { this.raise(start, "Unterminated regular expression"); }
+      if (!escaped) {
+        if (ch === "[") { inClass = true; }
+        else if (ch === "]" && inClass) { inClass = false; }
+        else if (ch === "/" && !inClass) { break }
+        escaped = ch === "\\";
+      } else { escaped = false; }
+      ++this.pos;
+    }
+    var pattern = this.input.slice(start, this.pos);
+    ++this.pos;
+    var flagsStart = this.pos;
+    var flags = this.readWord1();
+    if (this.containsEsc) { this.unexpected(flagsStart); }
+
+    // Validate pattern
+    var state = this.regexpState || (this.regexpState = new RegExpValidationState(this));
+    state.reset(start, pattern, flags);
+    this.validateRegExpFlags(state);
+    this.validateRegExpPattern(state);
+
+    // Create Literal#value property value.
+    var value = null;
+    try {
+      value = new RegExp(pattern, flags);
+    } catch (e) {
+      // ESTree requires null if it failed to instantiate RegExp object.
+      // https://github.com/estree/estree/blob/a27003adf4fd7bfad44de9cef372a2eacd527b1c/es5.md#regexpliteral
+    }
 
-// Read an integer in the given radix. Return null if zero digits
-// were read, the integer value otherwise. When `len` is given, this
-// will return `null` unless the integer has exactly `len` digits.
-
-pp$8.readInt = function(radix, len) {
-  var this$1 = this;
-
-  var start = this.pos, total = 0;
-  for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
-    var code = this$1.input.charCodeAt(this$1.pos), val = (void 0);
-    if (code >= 97) { val = code - 97 + 10; } // a
-    else if (code >= 65) { val = code - 65 + 10; } // A
-    else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9
-    else { val = Infinity; }
-    if (val >= radix) { break }
-    ++this$1.pos;
-    total = total * radix + val;
-  }
-  if (this.pos === start || len != null && this.pos - start !== len) { return null }
+    return this.finishToken(types.regexp, {pattern: pattern, flags: flags, value: value})
+  };
 
-  return total
-};
+  // Read an integer in the given radix. Return null if zero digits
+  // were read, the integer value otherwise. When `len` is given, this
+  // will return `null` unless the integer has exactly `len` digits.
+
+  pp$9.readInt = function(radix, len) {
+    var start = this.pos, total = 0;
+    for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
+      var code = this.input.charCodeAt(this.pos), val = (void 0);
+      if (code >= 97) { val = code - 97 + 10; } // a
+      else if (code >= 65) { val = code - 65 + 10; } // A
+      else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9
+      else { val = Infinity; }
+      if (val >= radix) { break }
+      ++this.pos;
+      total = total * radix + val;
+    }
+    if (this.pos === start || len != null && this.pos - start !== len) { return null }
+
+    return total
+  };
 
-pp$8.readRadixNumber = function(radix) {
-  this.pos += 2; // 0x
-  var val = this.readInt(radix);
-  if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); }
-  if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
-  return this.finishToken(types.num, val)
-};
+  pp$9.readRadixNumber = function(radix) {
+    var start = this.pos;
+    this.pos += 2; // 0x
+    var val = this.readInt(radix);
+    if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); }
+    if (this.options.ecmaVersion >= 11 && this.input.charCodeAt(this.pos) === 110) {
+      val = typeof BigInt !== "undefined" ? BigInt(this.input.slice(start, this.pos)) : null;
+      ++this.pos;
+    } else if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+    return this.finishToken(types.num, val)
+  };
 
-// Read an integer, octal integer, or floating-point number.
+  // Read an integer, octal integer, or floating-point number.
+
+  pp$9.readNumber = function(startsWithDot) {
+    var start = this.pos;
+    if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); }
+    var octal = this.pos - start >= 2 && this.input.charCodeAt(start) === 48;
+    if (octal && this.strict) { this.raise(start, "Invalid number"); }
+    var next = this.input.charCodeAt(this.pos);
+    if (!octal && !startsWithDot && this.options.ecmaVersion >= 11 && next === 110) {
+      var str$1 = this.input.slice(start, this.pos);
+      var val$1 = typeof BigInt !== "undefined" ? BigInt(str$1) : null;
+      ++this.pos;
+      if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+      return this.finishToken(types.num, val$1)
+    }
+    if (octal && /[89]/.test(this.input.slice(start, this.pos))) { octal = false; }
+    if (next === 46 && !octal) { // '.'
+      ++this.pos;
+      this.readInt(10);
+      next = this.input.charCodeAt(this.pos);
+    }
+    if ((next === 69 || next === 101) && !octal) { // 'eE'
+      next = this.input.charCodeAt(++this.pos);
+      if (next === 43 || next === 45) { ++this.pos; } // '+-'
+      if (this.readInt(10) === null) { this.raise(start, "Invalid number"); }
+    }
+    if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+
+    var str = this.input.slice(start, this.pos);
+    var val = octal ? parseInt(str, 8) : parseFloat(str);
+    return this.finishToken(types.num, val)
+  };
 
-pp$8.readNumber = function(startsWithDot) {
-  var start = this.pos;
-  if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); }
-  var octal = this.pos - start >= 2 && this.input.charCodeAt(start) === 48;
-  if (octal && this.strict) { this.raise(start, "Invalid number"); }
-  if (octal && /[89]/.test(this.input.slice(start, this.pos))) { octal = false; }
-  var next = this.input.charCodeAt(this.pos);
-  if (next === 46 && !octal) { // '.'
-    ++this.pos;
-    this.readInt(10);
-    next = this.input.charCodeAt(this.pos);
-  }
-  if ((next === 69 || next === 101) && !octal) { // 'eE'
-    next = this.input.charCodeAt(++this.pos);
-    if (next === 43 || next === 45) { ++this.pos; } // '+-'
-    if (this.readInt(10) === null) { this.raise(start, "Invalid number"); }
-  }
-  if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+  // Read a string value, interpreting backslash-escapes.
 
-  var str = this.input.slice(start, this.pos);
-  var val = octal ? parseInt(str, 8) : parseFloat(str);
-  return this.finishToken(types.num, val)
-};
+  pp$9.readCodePoint = function() {
+    var ch = this.input.charCodeAt(this.pos), code;
 
-// Read a string value, interpreting backslash-escapes.
+    if (ch === 123) { // '{'
+      if (this.options.ecmaVersion < 6) { this.unexpected(); }
+      var codePos = ++this.pos;
+      code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos);
+      ++this.pos;
+      if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); }
+    } else {
+      code = this.readHexChar(4);
+    }
+    return code
+  };
 
-pp$8.readCodePoint = function() {
-  var ch = this.input.charCodeAt(this.pos), code;
+  function codePointToString$1(code) {
+    // UTF-16 Decoding
+    if (code <= 0xFFFF) { return String.fromCharCode(code) }
+    code -= 0x10000;
+    return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
+  }
+
+  pp$9.readString = function(quote) {
+    var out = "", chunkStart = ++this.pos;
+    for (;;) {
+      if (this.pos >= this.input.length) { this.raise(this.start, "Unterminated string constant"); }
+      var ch = this.input.charCodeAt(this.pos);
+      if (ch === quote) { break }
+      if (ch === 92) { // '\'
+        out += this.input.slice(chunkStart, this.pos);
+        out += this.readEscapedChar(false);
+        chunkStart = this.pos;
+      } else {
+        if (isNewLine(ch, this.options.ecmaVersion >= 10)) { this.raise(this.start, "Unterminated string constant"); }
+        ++this.pos;
+      }
+    }
+    out += this.input.slice(chunkStart, this.pos++);
+    return this.finishToken(types.string, out)
+  };
 
-  if (ch === 123) { // '{'
-    if (this.options.ecmaVersion < 6) { this.unexpected(); }
-    var codePos = ++this.pos;
-    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos);
-    ++this.pos;
-    if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); }
-  } else {
-    code = this.readHexChar(4);
-  }
-  return code
-};
+  // Reads template string tokens.
 
-function codePointToString(code) {
-  // UTF-16 Decoding
-  if (code <= 0xFFFF) { return String.fromCharCode(code) }
-  code -= 0x10000;
-  return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
-}
+  var INVALID_TEMPLATE_ESCAPE_ERROR = {};
 
-pp$8.readString = function(quote) {
-  var this$1 = this;
-
-  var out = "", chunkStart = ++this.pos;
-  for (;;) {
-    if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); }
-    var ch = this$1.input.charCodeAt(this$1.pos);
-    if (ch === quote) { break }
-    if (ch === 92) { // '\'
-      out += this$1.input.slice(chunkStart, this$1.pos);
-      out += this$1.readEscapedChar(false);
-      chunkStart = this$1.pos;
-    } else {
-      if (isNewLine(ch, this$1.options.ecmaVersion >= 10)) { this$1.raise(this$1.start, "Unterminated string constant"); }
-      ++this$1.pos;
+  pp$9.tryReadTemplateToken = function() {
+    this.inTemplateElement = true;
+    try {
+      this.readTmplToken();
+    } catch (err) {
+      if (err === INVALID_TEMPLATE_ESCAPE_ERROR) {
+        this.readInvalidTemplateToken();
+      } else {
+        throw err
+      }
     }
-  }
-  out += this.input.slice(chunkStart, this.pos++);
-  return this.finishToken(types.string, out)
-};
 
-// Reads template string tokens.
-
-var INVALID_TEMPLATE_ESCAPE_ERROR = {};
+    this.inTemplateElement = false;
+  };
 
-pp$8.tryReadTemplateToken = function() {
-  this.inTemplateElement = true;
-  try {
-    this.readTmplToken();
-  } catch (err) {
-    if (err === INVALID_TEMPLATE_ESCAPE_ERROR) {
-      this.readInvalidTemplateToken();
+  pp$9.invalidStringToken = function(position, message) {
+    if (this.inTemplateElement && this.options.ecmaVersion >= 9) {
+      throw INVALID_TEMPLATE_ESCAPE_ERROR
     } else {
-      throw err
+      this.raise(position, message);
     }
-  }
-
-  this.inTemplateElement = false;
-};
-
-pp$8.invalidStringToken = function(position, message) {
-  if (this.inTemplateElement && this.options.ecmaVersion >= 9) {
-    throw INVALID_TEMPLATE_ESCAPE_ERROR
-  } else {
-    this.raise(position, message);
-  }
-};
+  };
 
-pp$8.readTmplToken = function() {
-  var this$1 = this;
-
-  var out = "", chunkStart = this.pos;
-  for (;;) {
-    if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); }
-    var ch = this$1.input.charCodeAt(this$1.pos);
-    if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${'
-      if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) {
-        if (ch === 36) {
-          this$1.pos += 2;
-          return this$1.finishToken(types.dollarBraceL)
-        } else {
-          ++this$1.pos;
-          return this$1.finishToken(types.backQuote)
+  pp$9.readTmplToken = function() {
+    var out = "", chunkStart = this.pos;
+    for (;;) {
+      if (this.pos >= this.input.length) { this.raise(this.start, "Unterminated template"); }
+      var ch = this.input.charCodeAt(this.pos);
+      if (ch === 96 || ch === 36 && this.input.charCodeAt(this.pos + 1) === 123) { // '`', '${'
+        if (this.pos === this.start && (this.type === types.template || this.type === types.invalidTemplate)) {
+          if (ch === 36) {
+            this.pos += 2;
+            return this.finishToken(types.dollarBraceL)
+          } else {
+            ++this.pos;
+            return this.finishToken(types.backQuote)
+          }
         }
+        out += this.input.slice(chunkStart, this.pos);
+        return this.finishToken(types.template, out)
       }
-      out += this$1.input.slice(chunkStart, this$1.pos);
-      return this$1.finishToken(types.template, out)
-    }
-    if (ch === 92) { // '\'
-      out += this$1.input.slice(chunkStart, this$1.pos);
-      out += this$1.readEscapedChar(true);
-      chunkStart = this$1.pos;
-    } else if (isNewLine(ch)) {
-      out += this$1.input.slice(chunkStart, this$1.pos);
-      ++this$1.pos;
-      switch (ch) {
-      case 13:
-        if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; }
-      case 10:
-        out += "\n";
-        break
-      default:
-        out += String.fromCharCode(ch);
-        break
-      }
-      if (this$1.options.locations) {
-        ++this$1.curLine;
-        this$1.lineStart = this$1.pos;
+      if (ch === 92) { // '\'
+        out += this.input.slice(chunkStart, this.pos);
+        out += this.readEscapedChar(true);
+        chunkStart = this.pos;
+      } else if (isNewLine(ch)) {
+        out += this.input.slice(chunkStart, this.pos);
+        ++this.pos;
+        switch (ch) {
+        case 13:
+          if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; }
+        case 10:
+          out += "\n";
+          break
+        default:
+          out += String.fromCharCode(ch);
+          break
+        }
+        if (this.options.locations) {
+          ++this.curLine;
+          this.lineStart = this.pos;
+        }
+        chunkStart = this.pos;
+      } else {
+        ++this.pos;
       }
-      chunkStart = this$1.pos;
-    } else {
-      ++this$1.pos;
     }
-  }
-};
+  };
 
-// Reads a template token to search for the end, without validating any escape sequences
-pp$8.readInvalidTemplateToken = function() {
-  var this$1 = this;
+  // Reads a template token to search for the end, without validating any escape sequences
+  pp$9.readInvalidTemplateToken = function() {
+    for (; this.pos < this.input.length; this.pos++) {
+      switch (this.input[this.pos]) {
+      case "\\":
+        ++this.pos;
+        break
 
-  for (; this.pos < this.input.length; this.pos++) {
-    switch (this$1.input[this$1.pos]) {
-    case "\\":
-      ++this$1.pos;
-      break
+      case "$":
+        if (this.input[this.pos + 1] !== "{") {
+          break
+        }
+      // falls through
 
-    case "$":
-      if (this$1.input[this$1.pos + 1] !== "{") {
-        break
+      case "`":
+        return this.finishToken(types.invalidTemplate, this.input.slice(this.start, this.pos))
+
+      // no default
       }
-    // falls through
+    }
+    this.raise(this.start, "Unterminated template");
+  };
 
-    case "`":
-      return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos))
+  // Used to read escaped characters
 
-    // no default
-    }
-  }
-  this.raise(this.start, "Unterminated template");
-};
+  pp$9.readEscapedChar = function(inTemplate) {
+    var ch = this.input.charCodeAt(++this.pos);
+    ++this.pos;
+    switch (ch) {
+    case 110: return "\n" // 'n' -> '\n'
+    case 114: return "\r" // 'r' -> '\r'
+    case 120: return String.fromCharCode(this.readHexChar(2)) // 'x'
+    case 117: return codePointToString$1(this.readCodePoint()) // 'u'
+    case 116: return "\t" // 't' -> '\t'
+    case 98: return "\b" // 'b' -> '\b'
+    case 118: return "\u000b" // 'v' -> '\u000b'
+    case 102: return "\f" // 'f' -> '\f'
+    case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n'
+    case 10: // ' \n'
+      if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
+      return ""
+    case 56:
+    case 57:
+      if (inTemplate) {
+        var codePos = this.pos - 1;
 
-// Used to read escaped characters
-
-pp$8.readEscapedChar = function(inTemplate) {
-  var ch = this.input.charCodeAt(++this.pos);
-  ++this.pos;
-  switch (ch) {
-  case 110: return "\n" // 'n' -> '\n'
-  case 114: return "\r" // 'r' -> '\r'
-  case 120: return String.fromCharCode(this.readHexChar(2)) // 'x'
-  case 117: return codePointToString(this.readCodePoint()) // 'u'
-  case 116: return "\t" // 't' -> '\t'
-  case 98: return "\b" // 'b' -> '\b'
-  case 118: return "\u000b" // 'v' -> '\u000b'
-  case 102: return "\f" // 'f' -> '\f'
-  case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n'
-  case 10: // ' \n'
-    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
-    return ""
-  default:
-    if (ch >= 48 && ch <= 55) {
-      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
-      var octal = parseInt(octalStr, 8);
-      if (octal > 255) {
-        octalStr = octalStr.slice(0, -1);
-        octal = parseInt(octalStr, 8);
-      }
-      this.pos += octalStr.length - 1;
-      ch = this.input.charCodeAt(this.pos);
-      if ((octalStr !== "0" || ch === 56 || ch === 57) && (this.strict || inTemplate)) {
         this.invalidStringToken(
-          this.pos - 1 - octalStr.length,
-          inTemplate
-            ? "Octal literal in template string"
-            : "Octal literal in strict mode"
+          codePos,
+          "Invalid escape sequence in template string"
         );
+
+        return null
       }
-      return String.fromCharCode(octal)
-    }
-    if (isNewLine(ch)) {
-      // Unicode new line characters after \ get removed from output in both
-      // template literals and strings
-      return ""
+    default:
+      if (ch >= 48 && ch <= 55) {
+        var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
+        var octal = parseInt(octalStr, 8);
+        if (octal > 255) {
+          octalStr = octalStr.slice(0, -1);
+          octal = parseInt(octalStr, 8);
+        }
+        this.pos += octalStr.length - 1;
+        ch = this.input.charCodeAt(this.pos);
+        if ((octalStr !== "0" || ch === 56 || ch === 57) && (this.strict || inTemplate)) {
+          this.invalidStringToken(
+            this.pos - 1 - octalStr.length,
+            inTemplate
+              ? "Octal literal in template string"
+              : "Octal literal in strict mode"
+          );
+        }
+        return String.fromCharCode(octal)
+      }
+      if (isNewLine(ch)) {
+        // Unicode new line characters after \ get removed from output in both
+        // template literals and strings
+        return ""
+      }
+      return String.fromCharCode(ch)
     }
-    return String.fromCharCode(ch)
-  }
-};
+  };
 
-// Used to read character escape sequences ('\x', '\u', '\U').
+  // Used to read character escape sequences ('\x', '\u', '\U').
 
-pp$8.readHexChar = function(len) {
-  var codePos = this.pos;
-  var n = this.readInt(16, len);
-  if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); }
-  return n
-};
+  pp$9.readHexChar = function(len) {
+    var codePos = this.pos;
+    var n = this.readInt(16, len);
+    if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); }
+    return n
+  };
 
-// Read an identifier, and return it as a string. Sets `this.containsEsc`
-// to whether the word contained a '\u' escape.
-//
-// Incrementally adds only escaped chars, adding other chunks as-is
-// as a micro-optimization.
-
-pp$8.readWord1 = function() {
-  var this$1 = this;
-
-  this.containsEsc = false;
-  var word = "", first = true, chunkStart = this.pos;
-  var astral = this.options.ecmaVersion >= 6;
-  while (this.pos < this.input.length) {
-    var ch = this$1.fullCharCodeAtPos();
-    if (isIdentifierChar(ch, astral)) {
-      this$1.pos += ch <= 0xffff ? 1 : 2;
-    } else if (ch === 92) { // "\"
-      this$1.containsEsc = true;
-      word += this$1.input.slice(chunkStart, this$1.pos);
-      var escStart = this$1.pos;
-      if (this$1.input.charCodeAt(++this$1.pos) !== 117) // "u"
-        { this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); }
-      ++this$1.pos;
-      var esc = this$1.readCodePoint();
-      if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
-        { this$1.invalidStringToken(escStart, "Invalid Unicode escape"); }
-      word += codePointToString(esc);
-      chunkStart = this$1.pos;
-    } else {
-      break
+  // Read an identifier, and return it as a string. Sets `this.containsEsc`
+  // to whether the word contained a '\u' escape.
+  //
+  // Incrementally adds only escaped chars, adding other chunks as-is
+  // as a micro-optimization.
+
+  pp$9.readWord1 = function() {
+    this.containsEsc = false;
+    var word = "", first = true, chunkStart = this.pos;
+    var astral = this.options.ecmaVersion >= 6;
+    while (this.pos < this.input.length) {
+      var ch = this.fullCharCodeAtPos();
+      if (isIdentifierChar(ch, astral)) {
+        this.pos += ch <= 0xffff ? 1 : 2;
+      } else if (ch === 92) { // "\"
+        this.containsEsc = true;
+        word += this.input.slice(chunkStart, this.pos);
+        var escStart = this.pos;
+        if (this.input.charCodeAt(++this.pos) !== 117) // "u"
+          { this.invalidStringToken(this.pos, "Expecting Unicode escape sequence \\uXXXX"); }
+        ++this.pos;
+        var esc = this.readCodePoint();
+        if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
+          { this.invalidStringToken(escStart, "Invalid Unicode escape"); }
+        word += codePointToString$1(esc);
+        chunkStart = this.pos;
+      } else {
+        break
+      }
+      first = false;
     }
-    first = false;
-  }
-  return word + this.input.slice(chunkStart, this.pos)
-};
+    return word + this.input.slice(chunkStart, this.pos)
+  };
 
-// Read an identifier or keyword token. Will check for reserved
-// words when necessary.
+  // Read an identifier or keyword token. Will check for reserved
+  // words when necessary.
 
-pp$8.readWord = function() {
-  var word = this.readWord1();
-  var type = types.name;
-  if (this.keywords.test(word)) {
-    if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); }
-    type = keywords$1[word];
+  pp$9.readWord = function() {
+    var word = this.readWord1();
+    var type = types.name;
+    if (this.keywords.test(word)) {
+      type = keywords$1[word];
+    }
+    return this.finishToken(type, word)
+  };
+
+  // Acorn is a tiny, fast JavaScript parser written in JavaScript.
+
+  var version = "7.1.0";
+
+  Parser.acorn = {
+    Parser: Parser,
+    version: version,
+    defaultOptions: defaultOptions,
+    Position: Position,
+    SourceLocation: SourceLocation,
+    getLineInfo: getLineInfo,
+    Node: Node,
+    TokenType: TokenType,
+    tokTypes: types,
+    keywordTypes: keywords$1,
+    TokContext: TokContext,
+    tokContexts: types$1,
+    isIdentifierChar: isIdentifierChar,
+    isIdentifierStart: isIdentifierStart,
+    Token: Token,
+    isNewLine: isNewLine,
+    lineBreak: lineBreak,
+    lineBreakG: lineBreakG,
+    nonASCIIwhitespace: nonASCIIwhitespace
+  };
+
+  // The main exported interface (under `self.acorn` when in the
+  // browser) is a `parse` function that takes a code string and
+  // returns an abstract syntax tree as specified by [Mozilla parser
+  // API][api].
+  //
+  // [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
+
+  function parse(input, options) {
+    return Parser.parse(input, options)
   }
-  return this.finishToken(type, word)
-};
 
-// Acorn is a tiny, fast JavaScript parser written in JavaScript.
-//
-// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
-// various contributors and released under an MIT license.
-//
-// Git repositories for Acorn are available at
-//
-//     http://marijnhaverbeke.nl/git/acorn
-//     https://github.com/acornjs/acorn.git
-//
-// Please use the [github bug tracker][ghbt] to report issues.
-//
-// [ghbt]: https://github.com/acornjs/acorn/issues
-//
-// [walk]: util/walk.js
-
-var version = "6.1.1";
-
-// The main exported interface (under `self.acorn` when in the
-// browser) is a `parse` function that takes a code string and
-// returns an abstract syntax tree as specified by [Mozilla parser
-// API][api].
-//
-// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
-
-function parse(input, options) {
-  return Parser.parse(input, options)
-}
+  // This function tries to parse a single expression at a given
+  // offset in a string. Useful for parsing mixed-language formats
+  // that embed JavaScript expressions.
 
-// This function tries to parse a single expression at a given
-// offset in a string. Useful for parsing mixed-language formats
-// that embed JavaScript expressions.
+  function parseExpressionAt(input, pos, options) {
+    return Parser.parseExpressionAt(input, pos, options)
+  }
 
-function parseExpressionAt(input, pos, options) {
-  return Parser.parseExpressionAt(input, pos, options)
-}
+  // Acorn is organized as a tokenizer and a recursive-descent parser.
+  // The `tokenizer` export provides an interface to the tokenizer.
 
-// Acorn is organized as a tokenizer and a recursive-descent parser.
-// The `tokenizer` export provides an interface to the tokenizer.
+  function tokenizer(input, options) {
+    return Parser.tokenizer(input, options)
+  }
 
-function tokenizer(input, options) {
-  return Parser.tokenizer(input, options)
-}
+  exports.Node = Node;
+  exports.Parser = Parser;
+  exports.Position = Position;
+  exports.SourceLocation = SourceLocation;
+  exports.TokContext = TokContext;
+  exports.Token = Token;
+  exports.TokenType = TokenType;
+  exports.defaultOptions = defaultOptions;
+  exports.getLineInfo = getLineInfo;
+  exports.isIdentifierChar = isIdentifierChar;
+  exports.isIdentifierStart = isIdentifierStart;
+  exports.isNewLine = isNewLine;
+  exports.keywordTypes = keywords$1;
+  exports.lineBreak = lineBreak;
+  exports.lineBreakG = lineBreakG;
+  exports.nonASCIIwhitespace = nonASCIIwhitespace;
+  exports.parse = parse;
+  exports.parseExpressionAt = parseExpressionAt;
+  exports.tokContexts = types$1;
+  exports.tokTypes = types;
+  exports.tokenizer = tokenizer;
+  exports.version = version;
 
-exports.version = version;
-exports.parse = parse;
-exports.parseExpressionAt = parseExpressionAt;
-exports.tokenizer = tokenizer;
-exports.Parser = Parser;
-exports.defaultOptions = defaultOptions;
-exports.Position = Position;
-exports.SourceLocation = SourceLocation;
-exports.getLineInfo = getLineInfo;
-exports.Node = Node;
-exports.TokenType = TokenType;
-exports.tokTypes = types;
-exports.keywordTypes = keywords$1;
-exports.TokContext = TokContext;
-exports.tokContexts = types$1;
-exports.isIdentifierChar = isIdentifierChar;
-exports.isIdentifierStart = isIdentifierStart;
-exports.Token = Token;
-exports.isNewLine = isNewLine;
-exports.lineBreak = lineBreak;
-exports.lineBreakG = lineBreakG;
-exports.nonASCIIwhitespace = nonASCIIwhitespace;
-
-Object.defineProperty(exports, '__esModule', { value: true });
-
-})));
+  Object.defineProperty(exports, '__esModule', { value: true });
 
+}));
 
 },{}],15:[function(require,module,exports){
-arguments[4][14][0].apply(exports,arguments)
-},{"dup":14}],16:[function(require,module,exports){
 /*
  A JavaScript implementation of the SHA family of hashes, as
  defined in FIPS PUB 180-4 and FIPS PUB 202, as well as the corresponding
  HMAC implementation as defined in FIPS PUB 198a
 
- Copyright Brian Turek 2008-2017
+ Copyright 2008-2020 Brian Turek, 1998-2009 Paul Johnston & Contributors
  Distributed under the BSD License
  See http://caligatio.github.com/jsSHA/ for more information
-
- Several functions taken from Paul Johnston
 */
-'use strict';(function(Y){function C(c,a,b){var e=0,h=[],n=0,g,l,d,f,m,q,u,r,I=!1,v=[],w=[],t,y=!1,z=!1,x=-1;b=b||{};g=b.encoding||"UTF8";t=b.numRounds||1;if(t!==parseInt(t,10)||1>t)throw Error("numRounds must a integer >= 1");if("SHA-1"===c)m=512,q=K,u=Z,f=160,r=function(a){return a.slice()};else if(0===c.lastIndexOf("SHA-",0))if(q=function(a,b){return L(a,b,c)},u=function(a,b,h,e){var k,f;if("SHA-224"===c||"SHA-256"===c)k=(b+65>>>9<<4)+15,f=16;else if("SHA-384"===c||"SHA-512"===c)k=(b+129>>>10<<
-5)+31,f=32;else throw Error("Unexpected error in SHA-2 implementation");for(;a.length<=k;)a.push(0);a[b>>>5]|=128<<24-b%32;b=b+h;a[k]=b&4294967295;a[k-1]=b/4294967296|0;h=a.length;for(b=0;b<h;b+=f)e=L(a.slice(b,b+f),e,c);if("SHA-224"===c)a=[e[0],e[1],e[2],e[3],e[4],e[5],e[6]];else if("SHA-256"===c)a=e;else if("SHA-384"===c)a=[e[0].a,e[0].b,e[1].a,e[1].b,e[2].a,e[2].b,e[3].a,e[3].b,e[4].a,e[4].b,e[5].a,e[5].b];else if("SHA-512"===c)a=[e[0].a,e[0].b,e[1].a,e[1].b,e[2].a,e[2].b,e[3].a,e[3].b,e[4].a,
-e[4].b,e[5].a,e[5].b,e[6].a,e[6].b,e[7].a,e[7].b];else throw Error("Unexpected error in SHA-2 implementation");return a},r=function(a){return a.slice()},"SHA-224"===c)m=512,f=224;else if("SHA-256"===c)m=512,f=256;else if("SHA-384"===c)m=1024,f=384;else if("SHA-512"===c)m=1024,f=512;else throw Error("Chosen SHA variant is not supported");else if(0===c.lastIndexOf("SHA3-",0)||0===c.lastIndexOf("SHAKE",0)){var F=6;q=D;r=function(a){var c=[],e;for(e=0;5>e;e+=1)c[e]=a[e].slice();return c};x=1;if("SHA3-224"===
-c)m=1152,f=224;else if("SHA3-256"===c)m=1088,f=256;else if("SHA3-384"===c)m=832,f=384;else if("SHA3-512"===c)m=576,f=512;else if("SHAKE128"===c)m=1344,f=-1,F=31,z=!0;else if("SHAKE256"===c)m=1088,f=-1,F=31,z=!0;else throw Error("Chosen SHA variant is not supported");u=function(a,c,e,b,h){e=m;var k=F,f,g=[],n=e>>>5,l=0,d=c>>>5;for(f=0;f<d&&c>=e;f+=n)b=D(a.slice(f,f+n),b),c-=e;a=a.slice(f);for(c%=e;a.length<n;)a.push(0);f=c>>>3;a[f>>2]^=k<<f%4*8;a[n-1]^=2147483648;for(b=D(a,b);32*g.length<h;){a=b[l%
-5][l/5|0];g.push(a.b);if(32*g.length>=h)break;g.push(a.a);l+=1;0===64*l%e&&D(null,b)}return g}}else throw Error("Chosen SHA variant is not supported");d=M(a,g,x);l=A(c);this.setHMACKey=function(a,b,h){var k;if(!0===I)throw Error("HMAC key already set");if(!0===y)throw Error("Cannot set HMAC key after calling update");if(!0===z)throw Error("SHAKE is not supported for HMAC");g=(h||{}).encoding||"UTF8";b=M(b,g,x)(a);a=b.binLen;b=b.value;k=m>>>3;h=k/4-1;if(k<a/8){for(b=u(b,a,0,A(c),f);b.length<=h;)b.push(0);
-b[h]&=4294967040}else if(k>a/8){for(;b.length<=h;)b.push(0);b[h]&=4294967040}for(a=0;a<=h;a+=1)v[a]=b[a]^909522486,w[a]=b[a]^1549556828;l=q(v,l);e=m;I=!0};this.update=function(a){var c,b,k,f=0,g=m>>>5;c=d(a,h,n);a=c.binLen;b=c.value;c=a>>>5;for(k=0;k<c;k+=g)f+m<=a&&(l=q(b.slice(k,k+g),l),f+=m);e+=f;h=b.slice(f>>>5);n=a%m;y=!0};this.getHash=function(a,b){var k,g,d,m;if(!0===I)throw Error("Cannot call getHash after setting HMAC key");d=N(b);if(!0===z){if(-1===d.shakeLen)throw Error("shakeLen must be specified in options");
-f=d.shakeLen}switch(a){case "HEX":k=function(a){return O(a,f,x,d)};break;case "B64":k=function(a){return P(a,f,x,d)};break;case "BYTES":k=function(a){return Q(a,f,x)};break;case "ARRAYBUFFER":try{g=new ArrayBuffer(0)}catch(p){throw Error("ARRAYBUFFER not supported by this environment");}k=function(a){return R(a,f,x)};break;default:throw Error("format must be HEX, B64, BYTES, or ARRAYBUFFER");}m=u(h.slice(),n,e,r(l),f);for(g=1;g<t;g+=1)!0===z&&0!==f%32&&(m[m.length-1]&=16777215>>>24-f%32),m=u(m,f,
-0,A(c),f);return k(m)};this.getHMAC=function(a,b){var k,g,d,p;if(!1===I)throw Error("Cannot call getHMAC without first setting HMAC key");d=N(b);switch(a){case "HEX":k=function(a){return O(a,f,x,d)};break;case "B64":k=function(a){return P(a,f,x,d)};break;case "BYTES":k=function(a){return Q(a,f,x)};break;case "ARRAYBUFFER":try{k=new ArrayBuffer(0)}catch(v){throw Error("ARRAYBUFFER not supported by this environment");}k=function(a){return R(a,f,x)};break;default:throw Error("outputFormat must be HEX, B64, BYTES, or ARRAYBUFFER");
-}g=u(h.slice(),n,e,r(l),f);p=q(w,A(c));p=u(g,f,m,p,f);return k(p)}}function b(c,a){this.a=c;this.b=a}function O(c,a,b,e){var h="";a/=8;var n,g,d;d=-1===b?3:0;for(n=0;n<a;n+=1)g=c[n>>>2]>>>8*(d+n%4*b),h+="0123456789abcdef".charAt(g>>>4&15)+"0123456789abcdef".charAt(g&15);return e.outputUpper?h.toUpperCase():h}function P(c,a,b,e){var h="",n=a/8,g,d,p,f;f=-1===b?3:0;for(g=0;g<n;g+=3)for(d=g+1<n?c[g+1>>>2]:0,p=g+2<n?c[g+2>>>2]:0,p=(c[g>>>2]>>>8*(f+g%4*b)&255)<<16|(d>>>8*(f+(g+1)%4*b)&255)<<8|p>>>8*(f+
-(g+2)%4*b)&255,d=0;4>d;d+=1)8*g+6*d<=a?h+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".charAt(p>>>6*(3-d)&63):h+=e.b64Pad;return h}function Q(c,a,b){var e="";a/=8;var h,d,g;g=-1===b?3:0;for(h=0;h<a;h+=1)d=c[h>>>2]>>>8*(g+h%4*b)&255,e+=String.fromCharCode(d);return e}function R(c,a,b){a/=8;var e,h=new ArrayBuffer(a),d,g;g=new Uint8Array(h);d=-1===b?3:0;for(e=0;e<a;e+=1)g[e]=c[e>>>2]>>>8*(d+e%4*b)&255;return h}function N(c){var a={outputUpper:!1,b64Pad:"=",shakeLen:-1};c=c||{};
-a.outputUpper=c.outputUpper||!1;!0===c.hasOwnProperty("b64Pad")&&(a.b64Pad=c.b64Pad);if(!0===c.hasOwnProperty("shakeLen")){if(0!==c.shakeLen%8)throw Error("shakeLen must be a multiple of 8");a.shakeLen=c.shakeLen}if("boolean"!==typeof a.outputUpper)throw Error("Invalid outputUpper formatting option");if("string"!==typeof a.b64Pad)throw Error("Invalid b64Pad formatting option");return a}function M(c,a,b){switch(a){case "UTF8":case "UTF16BE":case "UTF16LE":break;default:throw Error("encoding must be UTF8, UTF16BE, or UTF16LE");
-}switch(c){case "HEX":c=function(a,c,d){var g=a.length,l,p,f,m,q,u;if(0!==g%2)throw Error("String of HEX type must be in byte increments");c=c||[0];d=d||0;q=d>>>3;u=-1===b?3:0;for(l=0;l<g;l+=2){p=parseInt(a.substr(l,2),16);if(isNaN(p))throw Error("String of HEX type contains invalid characters");m=(l>>>1)+q;for(f=m>>>2;c.length<=f;)c.push(0);c[f]|=p<<8*(u+m%4*b)}return{value:c,binLen:4*g+d}};break;case "TEXT":c=function(c,h,d){var g,l,p=0,f,m,q,u,r,t;h=h||[0];d=d||0;q=d>>>3;if("UTF8"===a)for(t=-1===
-b?3:0,f=0;f<c.length;f+=1)for(g=c.charCodeAt(f),l=[],128>g?l.push(g):2048>g?(l.push(192|g>>>6),l.push(128|g&63)):55296>g||57344<=g?l.push(224|g>>>12,128|g>>>6&63,128|g&63):(f+=1,g=65536+((g&1023)<<10|c.charCodeAt(f)&1023),l.push(240|g>>>18,128|g>>>12&63,128|g>>>6&63,128|g&63)),m=0;m<l.length;m+=1){r=p+q;for(u=r>>>2;h.length<=u;)h.push(0);h[u]|=l[m]<<8*(t+r%4*b);p+=1}else if("UTF16BE"===a||"UTF16LE"===a)for(t=-1===b?2:0,l="UTF16LE"===a&&1!==b||"UTF16LE"!==a&&1===b,f=0;f<c.length;f+=1){g=c.charCodeAt(f);
-!0===l&&(m=g&255,g=m<<8|g>>>8);r=p+q;for(u=r>>>2;h.length<=u;)h.push(0);h[u]|=g<<8*(t+r%4*b);p+=2}return{value:h,binLen:8*p+d}};break;case "B64":c=function(a,c,d){var g=0,l,p,f,m,q,u,r,t;if(-1===a.search(/^[a-zA-Z0-9=+\/]+$/))throw Error("Invalid character in base-64 string");p=a.indexOf("=");a=a.replace(/\=/g,"");if(-1!==p&&p<a.length)throw Error("Invalid '=' found in base-64 string");c=c||[0];d=d||0;u=d>>>3;t=-1===b?3:0;for(p=0;p<a.length;p+=4){q=a.substr(p,4);for(f=m=0;f<q.length;f+=1)l="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf(q[f]),
-m|=l<<18-6*f;for(f=0;f<q.length-1;f+=1){r=g+u;for(l=r>>>2;c.length<=l;)c.push(0);c[l]|=(m>>>16-8*f&255)<<8*(t+r%4*b);g+=1}}return{value:c,binLen:8*g+d}};break;case "BYTES":c=function(a,c,d){var g,l,p,f,m,q;c=c||[0];d=d||0;p=d>>>3;q=-1===b?3:0;for(l=0;l<a.length;l+=1)g=a.charCodeAt(l),m=l+p,f=m>>>2,c.length<=f&&c.push(0),c[f]|=g<<8*(q+m%4*b);return{value:c,binLen:8*a.length+d}};break;case "ARRAYBUFFER":try{c=new ArrayBuffer(0)}catch(e){throw Error("ARRAYBUFFER not supported by this environment");}c=
-function(a,c,d){var g,l,p,f,m,q;c=c||[0];d=d||0;l=d>>>3;m=-1===b?3:0;q=new Uint8Array(a);for(g=0;g<a.byteLength;g+=1)f=g+l,p=f>>>2,c.length<=p&&c.push(0),c[p]|=q[g]<<8*(m+f%4*b);return{value:c,binLen:8*a.byteLength+d}};break;default:throw Error("format must be HEX, TEXT, B64, BYTES, or ARRAYBUFFER");}return c}function y(c,a){return c<<a|c>>>32-a}function S(c,a){return 32<a?(a-=32,new b(c.b<<a|c.a>>>32-a,c.a<<a|c.b>>>32-a)):0!==a?new b(c.a<<a|c.b>>>32-a,c.b<<a|c.a>>>32-a):c}function w(c,a){return c>>>
-a|c<<32-a}function t(c,a){var k=null,k=new b(c.a,c.b);return k=32>=a?new b(k.a>>>a|k.b<<32-a&4294967295,k.b>>>a|k.a<<32-a&4294967295):new b(k.b>>>a-32|k.a<<64-a&4294967295,k.a>>>a-32|k.b<<64-a&4294967295)}function T(c,a){var k=null;return k=32>=a?new b(c.a>>>a,c.b>>>a|c.a<<32-a&4294967295):new b(0,c.a>>>a-32)}function aa(c,a,b){return c&a^~c&b}function ba(c,a,k){return new b(c.a&a.a^~c.a&k.a,c.b&a.b^~c.b&k.b)}function U(c,a,b){return c&a^c&b^a&b}function ca(c,a,k){return new b(c.a&a.a^c.a&k.a^a.a&
-k.a,c.b&a.b^c.b&k.b^a.b&k.b)}function da(c){return w(c,2)^w(c,13)^w(c,22)}function ea(c){var a=t(c,28),k=t(c,34);c=t(c,39);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function fa(c){return w(c,6)^w(c,11)^w(c,25)}function ga(c){var a=t(c,14),k=t(c,18);c=t(c,41);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function ha(c){return w(c,7)^w(c,18)^c>>>3}function ia(c){var a=t(c,1),k=t(c,8);c=T(c,7);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function ja(c){return w(c,17)^w(c,19)^c>>>10}function ka(c){var a=t(c,19),k=t(c,61);
-c=T(c,6);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function G(c,a){var b=(c&65535)+(a&65535);return((c>>>16)+(a>>>16)+(b>>>16)&65535)<<16|b&65535}function la(c,a,b,e){var h=(c&65535)+(a&65535)+(b&65535)+(e&65535);return((c>>>16)+(a>>>16)+(b>>>16)+(e>>>16)+(h>>>16)&65535)<<16|h&65535}function H(c,a,b,e,h){var d=(c&65535)+(a&65535)+(b&65535)+(e&65535)+(h&65535);return((c>>>16)+(a>>>16)+(b>>>16)+(e>>>16)+(h>>>16)+(d>>>16)&65535)<<16|d&65535}function ma(c,a){var d,e,h;d=(c.b&65535)+(a.b&65535);e=(c.b>>>16)+
-(a.b>>>16)+(d>>>16);h=(e&65535)<<16|d&65535;d=(c.a&65535)+(a.a&65535)+(e>>>16);e=(c.a>>>16)+(a.a>>>16)+(d>>>16);return new b((e&65535)<<16|d&65535,h)}function na(c,a,d,e){var h,n,g;h=(c.b&65535)+(a.b&65535)+(d.b&65535)+(e.b&65535);n=(c.b>>>16)+(a.b>>>16)+(d.b>>>16)+(e.b>>>16)+(h>>>16);g=(n&65535)<<16|h&65535;h=(c.a&65535)+(a.a&65535)+(d.a&65535)+(e.a&65535)+(n>>>16);n=(c.a>>>16)+(a.a>>>16)+(d.a>>>16)+(e.a>>>16)+(h>>>16);return new b((n&65535)<<16|h&65535,g)}function oa(c,a,d,e,h){var n,g,l;n=(c.b&
-65535)+(a.b&65535)+(d.b&65535)+(e.b&65535)+(h.b&65535);g=(c.b>>>16)+(a.b>>>16)+(d.b>>>16)+(e.b>>>16)+(h.b>>>16)+(n>>>16);l=(g&65535)<<16|n&65535;n=(c.a&65535)+(a.a&65535)+(d.a&65535)+(e.a&65535)+(h.a&65535)+(g>>>16);g=(c.a>>>16)+(a.a>>>16)+(d.a>>>16)+(e.a>>>16)+(h.a>>>16)+(n>>>16);return new b((g&65535)<<16|n&65535,l)}function B(c,a){return new b(c.a^a.a,c.b^a.b)}function A(c){var a=[],d;if("SHA-1"===c)a=[1732584193,4023233417,2562383102,271733878,3285377520];else if(0===c.lastIndexOf("SHA-",0))switch(a=
-[3238371032,914150663,812702999,4144912697,4290775857,1750603025,1694076839,3204075428],d=[1779033703,3144134277,1013904242,2773480762,1359893119,2600822924,528734635,1541459225],c){case "SHA-224":break;case "SHA-256":a=d;break;case "SHA-384":a=[new b(3418070365,a[0]),new b(1654270250,a[1]),new b(2438529370,a[2]),new b(355462360,a[3]),new b(1731405415,a[4]),new b(41048885895,a[5]),new b(3675008525,a[6]),new b(1203062813,a[7])];break;case "SHA-512":a=[new b(d[0],4089235720),new b(d[1],2227873595),
-new b(d[2],4271175723),new b(d[3],1595750129),new b(d[4],2917565137),new b(d[5],725511199),new b(d[6],4215389547),new b(d[7],327033209)];break;default:throw Error("Unknown SHA variant");}else if(0===c.lastIndexOf("SHA3-",0)||0===c.lastIndexOf("SHAKE",0))for(c=0;5>c;c+=1)a[c]=[new b(0,0),new b(0,0),new b(0,0),new b(0,0),new b(0,0)];else throw Error("No SHA variants supported");return a}function K(c,a){var b=[],e,d,n,g,l,p,f;e=a[0];d=a[1];n=a[2];g=a[3];l=a[4];for(f=0;80>f;f+=1)b[f]=16>f?c[f]:y(b[f-
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-a,k){var e,h,n,g,l,p,f,m,q,u,r,t,v,w,y,A,z,x,F,B,C,D,E=[],J;if("SHA-224"===k||"SHA-256"===k)u=64,t=1,D=Number,v=G,w=la,y=H,A=ha,z=ja,x=da,F=fa,C=U,B=aa,J=d;else if("SHA-384"===k||"SHA-512"===k)u=80,t=2,D=b,v=ma,w=na,y=oa,A=ia,z=ka,x=ea,F=ga,C=ca,B=ba,J=V;else throw Error("Unexpected error in SHA-2 implementation");k=a[0];e=a[1];h=a[2];n=a[3];g=a[4];l=a[5];p=a[6];f=a[7];for(r=0;r<u;r+=1)16>r?(q=r*t,m=c.length<=q?0:c[q],q=c.length<=q+1?0:c[q+1],E[r]=new D(m,q)):E[r]=w(z(E[r-2]),E[r-7],A(E[r-15]),E[r-
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+binLen:8*b.length+e}};break;case "ARRAYBUFFER":try{a=new ArrayBuffer(0)}catch(k){throw Error("ARRAYBUFFER not supported by this environment");}a=function(b,a,e){return T(new Uint8Array(b),a,e,d)};break;case "UINT8ARRAY":try{a=new Uint8Array(0)}catch(k){throw Error("UINT8ARRAY not supported by this environment");}a=function(b,a,e){return T(b,a,e,d)};break;default:throw Error("format must be HEX, TEXT, B64, BYTES, ARRAYBUFFER, or UINT8ARRAY");}return a}function y(a,b){return a<<b|a>>>32-b}function U(e,
+b){return 32<b?(b-=32,new a(e.b<<b|e.a>>>32-b,e.a<<b|e.b>>>32-b)):0!==b?new a(e.a<<b|e.b>>>32-b,e.b<<b|e.a>>>32-b):e}function x(a,b){return a>>>b|a<<32-b}function t(e,b){var d=null,d=new a(e.a,e.b);return d=32>=b?new a(d.a>>>b|d.b<<32-b&4294967295,d.b>>>b|d.a<<32-b&4294967295):new a(d.b>>>b-32|d.a<<64-b&4294967295,d.a>>>b-32|d.b<<64-b&4294967295)}function V(e,b){var d=null;return d=32>=b?new a(e.a>>>b,e.b>>>b|e.a<<32-b&4294967295):new a(0,e.a>>>b-32)}function ca(a,b,d){return a&b^~a&d}function da(e,
+b,d){return new a(e.a&b.a^~e.a&d.a,e.b&b.b^~e.b&d.b)}function W(a,b,d){return a&b^a&d^b&d}function ea(e,b,d){return new a(e.a&b.a^e.a&d.a^b.a&d.a,e.b&b.b^e.b&d.b^b.b&d.b)}function fa(a){return x(a,2)^x(a,13)^x(a,22)}function ga(e){var b=t(e,28),d=t(e,34);e=t(e,39);return new a(b.a^d.a^e.a,b.b^d.b^e.b)}function ha(a){return x(a,6)^x(a,11)^x(a,25)}function ia(e){var b=t(e,14),d=t(e,18);e=t(e,41);return new a(b.a^d.a^e.a,b.b^d.b^e.b)}function ja(a){return x(a,7)^x(a,18)^a>>>3}function ka(e){var b=t(e,
+1),d=t(e,8);e=V(e,7);return new a(b.a^d.a^e.a,b.b^d.b^e.b)}function la(a){return x(a,17)^x(a,19)^a>>>10}function ma(e){var b=t(e,19),d=t(e,61);e=V(e,6);return new a(b.a^d.a^e.a,b.b^d.b^e.b)}function G(a,b){var d=(a&65535)+(b&65535);return((a>>>16)+(b>>>16)+(d>>>16)&65535)<<16|d&65535}function na(a,b,d,k){var h=(a&65535)+(b&65535)+(d&65535)+(k&65535);return((a>>>16)+(b>>>16)+(d>>>16)+(k>>>16)+(h>>>16)&65535)<<16|h&65535}function H(a,b,d,k,h){var c=(a&65535)+(b&65535)+(d&65535)+(k&65535)+(h&65535);
+return((a>>>16)+(b>>>16)+(d>>>16)+(k>>>16)+(h>>>16)+(c>>>16)&65535)<<16|c&65535}function oa(e,b){var d,k,c;d=(e.b&65535)+(b.b&65535);k=(e.b>>>16)+(b.b>>>16)+(d>>>16);c=(k&65535)<<16|d&65535;d=(e.a&65535)+(b.a&65535)+(k>>>16);k=(e.a>>>16)+(b.a>>>16)+(d>>>16);return new a((k&65535)<<16|d&65535,c)}function pa(e,b,d,k){var c,l,g;c=(e.b&65535)+(b.b&65535)+(d.b&65535)+(k.b&65535);l=(e.b>>>16)+(b.b>>>16)+(d.b>>>16)+(k.b>>>16)+(c>>>16);g=(l&65535)<<16|c&65535;c=(e.a&65535)+(b.a&65535)+(d.a&65535)+(k.a&65535)+
+(l>>>16);l=(e.a>>>16)+(b.a>>>16)+(d.a>>>16)+(k.a>>>16)+(c>>>16);return new a((l&65535)<<16|c&65535,g)}function qa(e,b,d,k,c){var l,g,m;l=(e.b&65535)+(b.b&65535)+(d.b&65535)+(k.b&65535)+(c.b&65535);g=(e.b>>>16)+(b.b>>>16)+(d.b>>>16)+(k.b>>>16)+(c.b>>>16)+(l>>>16);m=(g&65535)<<16|l&65535;l=(e.a&65535)+(b.a&65535)+(d.a&65535)+(k.a&65535)+(c.a&65535)+(g>>>16);g=(e.a>>>16)+(b.a>>>16)+(d.a>>>16)+(k.a>>>16)+(c.a>>>16)+(l>>>16);return new a((g&65535)<<16|l&65535,m)}function B(e,b){return new a(e.a^b.a,e.b^
+b.b)}function A(e){var b=[],d;if("SHA-1"===e)b=[1732584193,4023233417,2562383102,271733878,3285377520];else if(0===e.lastIndexOf("SHA-",0))switch(b=[3238371032,914150663,812702999,4144912697,4290775857,1750603025,1694076839,3204075428],d=[1779033703,3144134277,1013904242,2773480762,1359893119,2600822924,528734635,1541459225],e){case "SHA-224":break;case "SHA-256":b=d;break;case "SHA-384":b=[new a(3418070365,b[0]),new a(1654270250,b[1]),new a(2438529370,b[2]),new a(355462360,b[3]),new a(1731405415,
+b[4]),new a(41048885895,b[5]),new a(3675008525,b[6]),new a(1203062813,b[7])];break;case "SHA-512":b=[new a(d[0],4089235720),new a(d[1],2227873595),new a(d[2],4271175723),new a(d[3],1595750129),new a(d[4],2917565137),new a(d[5],725511199),new a(d[6],4215389547),new a(d[7],327033209)];break;default:throw Error("Unknown SHA variant");}else if(0===e.lastIndexOf("SHA3-",0)||0===e.lastIndexOf("SHAKE",0))for(e=0;5>e;e+=1)b[e]=[new a(0,0),new a(0,0),new a(0,0),new a(0,0),new a(0,0)];else throw Error("No SHA variants supported");
+return b}function K(a,b){var d=[],k,c,l,g,m,p,f;k=b[0];c=b[1];l=b[2];g=b[3];m=b[4];for(f=0;80>f;f+=1)d[f]=16>f?a[f]:y(d[f-3]^d[f-8]^d[f-14]^d[f-16],1),p=20>f?H(y(k,5),c&l^~c&g,m,1518500249,d[f]):40>f?H(y(k,5),c^l^g,m,1859775393,d[f]):60>f?H(y(k,5),W(c,l,g),m,2400959708,d[f]):H(y(k,5),c^l^g,m,3395469782,d[f]),m=g,g=l,l=y(c,30),c=k,k=p;b[0]=G(k,b[0]);b[1]=G(c,b[1]);b[2]=G(l,b[2]);b[3]=G(g,b[3]);b[4]=G(m,b[4]);return b}function ba(a,b,d,c){var h;for(h=(b+65>>>9<<4)+15;a.length<=h;)a.push(0);a[b>>>5]|=
+128<<24-b%32;b+=d;a[h]=b&4294967295;a[h-1]=b/4294967296|0;b=a.length;for(h=0;h<b;h+=16)c=K(a.slice(h,h+16),c);return c}function L(e,b,d){var k,h,l,g,m,p,f,n,q,u,r,t,v,x,y,A,z,w,F,B,C,D,E=[],J;if("SHA-224"===d||"SHA-256"===d)u=64,t=1,D=Number,v=G,x=na,y=H,A=ja,z=la,w=fa,F=ha,C=W,B=ca,J=c;else if("SHA-384"===d||"SHA-512"===d)u=80,t=2,D=a,v=oa,x=pa,y=qa,A=ka,z=ma,w=ga,F=ia,C=ea,B=da,J=X;else throw Error("Unexpected error in SHA-2 implementation");d=b[0];k=b[1];h=b[2];l=b[3];g=b[4];m=b[5];p=b[6];f=b[7];
+for(r=0;r<u;r+=1)16>r?(q=r*t,n=e.length<=q?0:e[q],q=e.length<=q+1?0:e[q+1],E[r]=new D(n,q)):E[r]=x(z(E[r-2]),E[r-7],A(E[r-15]),E[r-16]),n=y(f,F(g),B(g,m,p),J[r],E[r]),q=v(w(d),C(d,k,h)),f=p,p=m,m=g,g=v(l,n),l=h,h=k,k=d,d=v(n,q);b[0]=v(d,b[0]);b[1]=v(k,b[1]);b[2]=v(h,b[2]);b[3]=v(l,b[3]);b[4]=v(g,b[4]);b[5]=v(m,b[5]);b[6]=v(p,b[6]);b[7]=v(f,b[7]);return b}function D(e,b){var d,c,h,l,g=[],m=[];if(null!==e)for(c=0;c<e.length;c+=2)b[(c>>>1)%5][(c>>>1)/5|0]=B(b[(c>>>1)%5][(c>>>1)/5|0],new a(e[c+1],e[c]));
+for(d=0;24>d;d+=1){l=A("SHA3-");for(c=0;5>c;c+=1){h=b[c][0];var p=b[c][1],f=b[c][2],n=b[c][3],q=b[c][4];g[c]=new a(h.a^p.a^f.a^n.a^q.a,h.b^p.b^f.b^n.b^q.b)}for(c=0;5>c;c+=1)m[c]=B(g[(c+4)%5],U(g[(c+1)%5],1));for(c=0;5>c;c+=1)for(h=0;5>h;h+=1)b[c][h]=B(b[c][h],m[c]);for(c=0;5>c;c+=1)for(h=0;5>h;h+=1)l[h][(2*c+3*h)%5]=U(b[c][h],Y[c][h]);for(c=0;5>c;c+=1)for(h=0;5>h;h+=1)b[c][h]=B(l[c][h],new a(~l[(c+1)%5][h].a&l[(c+2)%5][h].a,~l[(c+1)%5][h].b&l[(c+2)%5][h].b));b[0][0]=B(b[0][0],Z[d])}return b}var c,
+X,Y,Z;c=[1116352408,1899447441,3049323471,3921009573,961987163,1508970993,2453635748,2870763221,3624381080,310598401,607225278,1426881987,1925078388,2162078206,2614888103,3248222580,3835390401,4022224774,264347078,604807628,770255983,1249150122,1555081692,1996064986,2554220882,2821834349,2952996808,3210313671,3336571891,3584528711,113926993,338241895,666307205,773529912,1294757372,1396182291,1695183700,1986661051,2177026350,2456956037,2730485921,2820302411,3259730800,3345764771,3516065817,3600352804,
+4094571909,275423344,430227734,506948616,659060556,883997877,958139571,1322822218,1537002063,1747873779,1955562222,2024104815,2227730452,2361852424,2428436474,2756734187,3204031479,3329325298];X=[new a(c[0],3609767458),new a(c[1],602891725),new a(c[2],3964484399),new a(c[3],2173295548),new a(c[4],4081628472),new a(c[5],3053834265),new a(c[6],2937671579),new a(c[7],3664609560),new a(c[8],2734883394),new a(c[9],1164996542),new a(c[10],1323610764),new a(c[11],3590304994),new a(c[12],4068182383),new a(c[13],
+991336113),new a(c[14],633803317),new a(c[15],3479774868),new a(c[16],2666613458),new a(c[17],944711139),new a(c[18],2341262773),new a(c[19],2007800933),new a(c[20],1495990901),new a(c[21],1856431235),new a(c[22],3175218132),new a(c[23],2198950837),new a(c[24],3999719339),new a(c[25],766784016),new a(c[26],2566594879),new a(c[27],3203337956),new a(c[28],1034457026),new a(c[29],2466948901),new a(c[30],3758326383),new a(c[31],168717936),new a(c[32],1188179964),new a(c[33],1546045734),new a(c[34],1522805485),
+new a(c[35],2643833823),new a(c[36],2343527390),new a(c[37],1014477480),new a(c[38],1206759142),new a(c[39],344077627),new a(c[40],1290863460),new a(c[41],3158454273),new a(c[42],3505952657),new a(c[43],106217008),new a(c[44],3606008344),new a(c[45],1432725776),new a(c[46],1467031594),new a(c[47],851169720),new a(c[48],3100823752),new a(c[49],1363258195),new a(c[50],3750685593),new a(c[51],3785050280),new a(c[52],3318307427),new a(c[53],3812723403),new a(c[54],2003034995),new a(c[55],3602036899),
+new a(c[56],1575990012),new a(c[57],1125592928),new a(c[58],2716904306),new a(c[59],442776044),new a(c[60],593698344),new a(c[61],3733110249),new a(c[62],2999351573),new a(c[63],3815920427),new a(3391569614,3928383900),new a(3515267271,566280711),new a(3940187606,3454069534),new a(4118630271,4000239992),new a(116418474,1914138554),new a(174292421,2731055270),new a(289380356,3203993006),new a(460393269,320620315),new a(685471733,587496836),new a(852142971,1086792851),new a(1017036298,365543100),new a(1126000580,
+2618297676),new a(1288033470,3409855158),new a(1501505948,4234509866),new a(1607167915,987167468),new a(1816402316,1246189591)];Z=[new a(0,1),new a(0,32898),new a(2147483648,32906),new a(2147483648,2147516416),new a(0,32907),new a(0,2147483649),new a(2147483648,2147516545),new a(2147483648,32777),new a(0,138),new a(0,136),new a(0,2147516425),new a(0,2147483658),new a(0,2147516555),new a(2147483648,139),new a(2147483648,32905),new a(2147483648,32771),new a(2147483648,32770),new a(2147483648,128),new a(0,
+32778),new a(2147483648,2147483658),new a(2147483648,2147516545),new a(2147483648,32896),new a(0,2147483649),new a(2147483648,2147516424)];Y=[[0,36,3,41,18],[1,44,10,45,2],[62,6,43,15,61],[28,55,25,21,56],[27,20,39,8,14]];"function"===typeof define&&define.amd?define(function(){return C}):"undefined"!==typeof exports?("undefined"!==typeof module&&module.exports&&(module.exports=C),exports=C):aa.jsSHA=C})(this);
+
+},{}],16:[function(require,module,exports){
 /**
  * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
  * *
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/content/externalLicenseChecker.js b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/content/externalLicenseChecker.js
index 516057e..982ce04 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/content/externalLicenseChecker.js
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/content/externalLicenseChecker.js
@@ -42,7 +42,7 @@
       }
       let link = a => ({ url: a.href, label: a.textContent });
       let firstLink = parent => link(parent.querySelector("a"));
-      let allLinks = parent => Array.map(parent.querySelectorAll("a"), link);
+      let allLinks = parent => Array.prototype.map.call(parent.querySelectorAll("a"), link);
       for (let row of doc.querySelectorAll("table#jslicense-labels1 > tbody > tr")) {
         try {
           let cols = row.querySelectorAll("td");
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/html/preferences_panel/pref.js b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/html/preferences_panel/pref.js
index debb468..f8d8fdf 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/html/preferences_panel/pref.js
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/html/preferences_panel/pref.js
@@ -139,7 +139,7 @@
 		},
 		async swapSelection(list) {
 			let origin = list === Model.lists.black ? "white" : "black";
-		  await this.addToList(list, ...Array.map(
+		  await this.addToList(list, ...Array.prototype.map.call(
 				document.querySelectorAll(`select#${origin} option:checked`),
 				option => option.value)
 			);
@@ -189,7 +189,7 @@
 		async deleteSelection() {
 			for (let id of ["black", "white"]) {
 				let selection = document.querySelectorAll(`select#${id} option:checked`);
-				await Model.lists[id].remove(...Array.map(selection, option => option.value));
+				await Model.lists[id].remove(...Array.prototype.map.call(selection, option => option.value));
 			}
 			this.populateListUI();
 			this.syncAll();
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/manifest.json b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/manifest.json
index 61c770c..bccb1d7 100644
--- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/manifest.json
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/manifest.json
@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "GNU LibreJS",
   "short_name": "LibreJS",
-  "version": "7.20.1",
+  "version": "7.20.2",
   "author": "various",
   "description": "Only allows free and/or trivial Javascript to run.",
   "applications": {