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---@brief
---
--- https://clangd.llvm.org/installation.html
---
--- - **NOTE:** Clang >= 11 is recommended! See [#23](https://github.com/neovim/nvim-lspconfig/issues/23).
--- - If `compile_commands.json` lives in a build directory, you should
--- symlink it to the root of your source tree.
--- ```
--- ln -s /path/to/myproject/build/compile_commands.json /path/to/myproject/
--- ```
--- - clangd relies on a [JSON compilation database](https://clang.llvm.org/docs/JSONCompilationDatabase.html)
--- specified as compile_commands.json, see https://clangd.llvm.org/installation#compile_commandsjson
-- https://clangd.llvm.org/extensions.html#switch-between-sourceheader
local function switch_source_header(bufnr, client)
local method_name = 'textDocument/switchSourceHeader'
---@diagnostic disable-next-line:param-type-mismatch
if not client or not client:supports_method(method_name) then
return vim.notify(('method %s is not supported by any servers active on the current buffer'):format(method_name))
end
local params = vim.lsp.util.make_text_document_params(bufnr)
---@diagnostic disable-next-line:param-type-mismatch
client:request(method_name, params, function(err, result)
if err then
error(tostring(err))
end
if not result then
vim.notify('corresponding file cannot be determined')
return
end
vim.cmd.edit(vim.uri_to_fname(result))
end, bufnr)
end
local function symbol_info(bufnr, client)
local method_name = 'textDocument/symbolInfo'
---@diagnostic disable-next-line:param-type-mismatch
if not client or not client:supports_method(method_name) then
return vim.notify('Clangd client not found', vim.log.levels.ERROR)
end
local win = vim.api.nvim_get_current_win()
local params = vim.lsp.util.make_position_params(win, client.offset_encoding)
---@diagnostic disable-next-line:param-type-mismatch
client:request(method_name, params, function(err, res)
if err or #res == 0 then
-- Clangd always returns an error, there is no reason to parse it
return
end
local container = string.format('container: %s', res[1].containerName) ---@type string
local name = string.format('name: %s', res[1].name) ---@type string
vim.lsp.util.open_floating_preview({ name, container }, '', {
height = 2,
width = math.max(string.len(name), string.len(container)),
focusable = false,
focus = false,
title = 'Symbol Info',
})
end, bufnr)
end
---@class ClangdInitializeResult: lsp.InitializeResult
---@field offsetEncoding? string
---@type vim.lsp.Config
return {
cmd = { 'clangd' },
filetypes = { 'c', 'cpp', 'objc', 'objcpp', 'cuda' },
root_markers = {
'.clangd',
'.clang-tidy',
'.clang-format',
'compile_commands.json',
'compile_flags.txt',
'configure.ac', -- AutoTools
'.git',
},
capabilities = {
textDocument = {
completion = {
editsNearCursor = true,
},
},
offsetEncoding = { 'utf-8', 'utf-16' },
},
---@param init_result ClangdInitializeResult
on_init = function(client, init_result)
if init_result.offsetEncoding then
client.offset_encoding = init_result.offsetEncoding
end
end,
on_attach = function(client, bufnr)
vim.api.nvim_buf_create_user_command(bufnr, 'LspClangdSwitchSourceHeader', function()
switch_source_header(bufnr, client)
end, { desc = 'Switch between source/header' })
vim.api.nvim_buf_create_user_command(bufnr, 'LspClangdShowSymbolInfo', function()
symbol_info(bufnr, client)
end, { desc = 'Show symbol info' })
end,
}
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