Codeactions with Clangd not working for me

[yaaama]

I have a problem where I cannot use any code actions that have been highlighted to me when I am programming in C. I use the Clangd LSP.

The code action popup:

Debug on error (when I run eglot-code-actions):

Debugger entered--Lisp error: (error "[eglot] No code actions here")
  error("[eglot] %s" "No code actions here")
  eglot--error("No code actions here")
  apply(eglot--error "No code actions here")
  (or (let* ((--cl-var-- actions) (a nil) (--cl-var-- nil)) (while (consp --cl-var--) (setq a (car --cl-var--)) (setq --cl-var-- (cons (cons (plist-get a :title) a) --cl-var--)) (setq --cl-var-- (cdr --cl-var--))) (nreverse --cl-var--)) (apply #'eglot--error (if action-kind (list "No \"%s\" code actions here" action-kind) '("No code actions here"))))
  (let* ((menu-items (or (let* ((--cl-var-- actions) (a nil) (--cl-var-- nil)) (while (consp --cl-var--) (setq a (car --cl-var--)) (setq --cl-var-- (cons ... --cl-var--)) (setq --cl-var-- (cdr --cl-var--))) (nreverse --cl-var--)) (apply #'eglot--error (if action-kind (list "No \"%s\" code actions here" action-kind) '("No code actions here"))))) (preferred-action (cl-find-if #'(lambda (menu-item) (plist-get (cdr menu-item) :isPreferred)) menu-items)) (default-action (car (or preferred-action (car menu-items)))) (chosen (if (and action-kind (null (car (cdr menu-items)))) (cdr (car menu-items)) (if (listp last-nonmenu-event) (x-popup-menu last-nonmenu-event (list "Eglot code actions:" (cons "dummy" menu-items))) (cdr (assoc (completing-read ... menu-items nil t nil nil default-action) menu-items)))))) (eglot-execute server chosen))
  eglot--read-execute-code-action(nil #<eglot-lsp-server eglot-lsp-server-158107ee859e> nil)
  (if interactive (eglot--read-execute-code-action actions server action-kind) actions)
  (let* ((server (eglot--current-server-or-lose)) (actions (eglot--request server :textDocument/codeAction (list :textDocument (eglot--TextDocumentIdentifier) :range (list :start (eglot--pos-to-lsp-position beg) :end (eglot--pos-to-lsp-position end)) :context (cons ':diagnostics (cons (apply ... ...) (if action-kind ...)))))) (actions (let* ((--cl-vec-- actions) (--cl-idx-- -1) (a nil) (--cl-var-- nil)) (while (and (setq --cl-idx-- (1+ --cl-idx--)) (< --cl-idx-- (length --cl-vec--))) (setq a (aref --cl-vec-- --cl-idx--)) (if (or (not action-kind) (equal action-kind ...)) (progn (setq --cl-var-- ...)))) (nreverse --cl-var--)))) (if interactive (eglot--read-execute-code-action actions server action-kind) actions))
  eglot-code-actions(2464 2466 nil t)
  funcall-interactively(eglot-code-actions 2464 2466 nil t)
  command-execute(eglot-code-actions)

Eglot configuration:

(add-hook! 'c-mode-hook 'eglot-ensure)

(with-eval-after-load 'eglot
  (add-to-list 'eglot-server-programs
               '((c-mode c++-mode)
                 . ("clangd -j=8 --log=error --background-index --clang-tidy --completion-style=detailed --pch-storage=memory --header-insertion=never --header-insertion-decorators=0"
                    ))))

Eglot log:

Details

``` [internal] Wed Sep 20 08:28:24 2023: (:message "Running language server: clangd -j=8 --log=error --background-index --clang-tidy --completion-style=detailed --pch-storage=memory --header-insertion=never --header-insertion-decorators=0") [client-request] (id:1) Wed Sep 20 08:28:24 2023: (:jsonrpc "2.0" :id 1 :method "initialize" :params (:processId 582023 :clientInfo (:name "Eglot") :rootPath "/home/aayush/projects/nicer/" :rootUri "file:///home/aayush/projects/nicer" :initializationOptions #s(hash-table size 1 test eql rehash-size 1.5 rehash-threshold 0.8125 data ()) :capabilities (:workspace (:applyEdit t :executeCommand (:dynamicRegistration :json-false) :workspaceEdit (:documentChanges t) :didChangeWatchedFiles (:dynamicRegistration t) :symbol (:dynamicRegistration :json-false) :configuration t :workspaceFolders t) :textDocument (:synchronization (:dynamicRegistration :json-false :willSave t :willSaveWaitUntil t :didSave t) :completion (:dynamicRegistration :json-false :completionItem (:snippetSupport t :deprecatedSupport t :resolveSupport (:properties ["documentation" "details" "additionalTextEdits"]) :tagSupport (:valueSet [1])) :contextSupport t) :hover (:dynamicRegistration :json-false :contentFormat ["markdown" "plaintext"]) :signatureHelp (:dynamicRegistration :json-false :signatureInformation (:parameterInformation (:labelOffsetSupport t) :documentationFormat ["markdown" "plaintext"] :activeParameterSupport t)) :references (:dynamicRegistration :json-false) :definition (:dynamicRegistration :json-false :linkSupport t) :declaration (:dynamicRegistration :json-false :linkSupport t) :implementation (:dynamicRegistration :json-false :linkSupport t) :typeDefinition (:dynamicRegistration :json-false :linkSupport t) :documentSymbol (:dynamicRegistration :json-false :hierarchicalDocumentSymbolSupport t :symbolKind (:valueSet [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26])) :documentHighlight (:dynamicRegistration :json-false) :codeAction (:dynamicRegistration :json-false :resolveSupport (:properties ["edit" "command"]) :dataSupport t :codeActionLiteralSupport (:codeActionKind (:valueSet ["quickfix" "refactor" "refactor.extract" "refactor.inline" "refactor.rewrite" "source" "source.organizeImports"])) :isPreferredSupport t) :formatting (:dynamicRegistration :json-false) :rangeFormatting (:dynamicRegistration :json-false) :rename (:dynamicRegistration :json-false) :inlayHint (:dynamicRegistration :json-false) :publishDiagnostics (:relatedInformation :json-false :codeDescriptionSupport :json-false :tagSupport (:valueSet [1 2]))) :window (:showDocument (:support t) :workDoneProgress t) :general (:positionEncodings ["utf-32" "utf-8" "utf-16"]) :experimental #s(hash-table size 1 test eql rehash-size 1.5 rehash-threshold 0.8125 data ())) :workspaceFolders [(:uri "file:///home/aayush/projects/nicer" :name "~/projects/nicer/")])) [server-reply] (id:1) Wed Sep 20 08:28:24 2023: (:id 1 :jsonrpc "2.0" :result (:capabilities (:astProvider t :callHierarchyProvider t :clangdInlayHintsProvider t :codeActionProvider (:codeActionKinds ["quickfix" "refactor" "info"]) :compilationDatabase (:automaticReload t) :completionProvider (:resolveProvider :json-false :triggerCharacters ["." "<" ">" ":" "\"" "/" "*"]) :declarationProvider t :definitionProvider t :documentFormattingProvider t :documentHighlightProvider t :documentLinkProvider (:resolveProvider :json-false) :documentOnTypeFormattingProvider (:firstTriggerCharacter "\n" :moreTriggerCharacter []) :documentRangeFormattingProvider t :documentSymbolProvider t :executeCommandProvider (:commands ["clangd.applyFix" "clangd.applyTweak"]) :foldingRangeProvider t :hoverProvider t :implementationProvider t :inlayHintProvider t :memoryUsageProvider t :referencesProvider t :renameProvider t :selectionRangeProvider t :semanticTokensProvider (:full (:delta t) :legend (:tokenModifiers ["declaration" "definition" "deprecated" "deduced" "readonly" "static" "abstract" "virtual" "dependentName" "defaultLibrary" "usedAsMutableReference" "usedAsMutablePointer" "constructorOrDestructor" "userDefined" "functionScope" "classScope" "fileScope" "globalScope"] :tokenTypes ["variable" "variable" "parameter" "function" "method" "function" "property" "variable" "class" "interface" "enum" "enumMember" "type" "type" "unknown" "namespace" "typeParameter" "concept" "type" "macro" "modifier" "operator" "comment"]) :range :json-false) :signatureHelpProvider (:triggerCharacters ["(" ")" "{" "}" "<" ">" ","]) :standardTypeHierarchyProvider t :textDocumentSync (:change 2 :openClose t :save t) :typeDefinitionProvider t :typeHierarchyProvider t :workspaceSymbolProvider t) :serverInfo (:name "clangd" :version "clangd version 16.0.6 linux x86_64-pc-linux-gnu"))) [client-notification] Wed Sep 20 08:28:24 2023: (:jsonrpc "2.0" :method "initialized" :params #s(hash-table size 1 test eql rehash-size 1.5 rehash-threshold 0.8125 data ())) [client-notification] Wed Sep 20 08:28:24 2023: (:jsonrpc "2.0" :method "textDocument/didOpen" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c" :version 0 :languageId "c" :text "#include \"include/parser.h\"\n#include \"include/ast.h\"\n#include \n\n// Advances the current token stored in the parser\nToken *parser_next(Parser_t *parser) {\n\n TokenListNode *current = parser->curr_node;\n if (!current->next) {\n PRINT_TRACE(\"%s\", \"No tokens left!\");\n }\n\n parser->next_token = current->next->token;\n PRINT_TRACE(\"next_token is: `%s`\",\n tokentype_to_string(parser->next_token->type));\n return parser->next_token;\n}\n\nParser_t *init_parser(Lexer *lex) {\n\n // Allocating parser struct\n Parser_t *parser = calloc(1, sizeof(Parser_t));\n // Parser will store the lexer\n parser->lexer = lex;\n parser->token_list = parser->lexer->tokens;\n parser->curr_node = parser->lexer->tokens->head;\n\n // Assigning first token for our parser\n parser->next_token = parser->curr_node->token;\n\n return parser;\n}\n\n// Will advance the token and return the next one to parse\nToken *parser_eat(Parser_t *parser, TokenType expected) {\n\n // Error if next token is not expected one\n if (parser->next_token->type != expected) {\n char *received = tokentype_to_string(parser->next_token->type);\n char *expect = tokentype_to_string(expected);\n PRINT_ERROR(\"Error! Expected `%s` but received `%s`.\", expect, received);\n return NULL;\n }\n\n parser_next(parser);\n return parser->next_token;\n}\n\nvoid parser_destroy(Parser_t *parser) {\n\n // Free lexer->source\n // Free lexer->token->str\n // Free lexer->tokens (individually)\n // Then free the list struct\n // Free lexer->tokenlist\n // Then finally free the parser\n free(parser);\n}\n\nAST_t *parse_unary(Parser_t *parser) {\n\n AST_t *ast = ast_create(AST_COMPOUND);\n ast->data = (void *)parser->next_token;\n\n if (parser->next_token->type == TOKEN_BANG) {\n\n ast->data_type = TOKEN_BANG;\n return ast;\n\n } else if (parser->next_token->type == TOKEN_MINUS) {\n ast->data_type = TOKEN_MINUS;\n return ast;\n } else\n return NULL;\n}\n\nAST_t *parse_factor(Parser_t *parser) {\n\n AST_t *ast = parse_unary(parser);\n\n if (ast == NULL) {\n }\n}\n\nAST_t *parse_term(Parser_t *parser) { parse_factor(parser); }\n\nAST_t *parse_primary(Parser_t *parser) {\n TokenType ttype = parser->next_token->type;\n\n AST_t *ast = ast_create(AST_PRIMARY);\n ast->data_type = ttype;\n ast->data = ((void *)&(parser->next_token));\n\n if (ttype == TOKEN_LEFTPAREN) {\n /* parse_expression(parser); */\n }\n}\n\nAST_t *parse_expression(Parser_t *parser) {\n AST_t *ast = ast_create(AST_COMPOUND)\n\n if (parser->next_token->type == TOKEN_IDENTIFIER) {}\n}\n\nAST_t *parse_compound(Parser_t *parser) {\n\n AST_t *ast = ast_create(AST_COMPOUND);\n\n if (parser->next_token->type == TOKEN_NUMBER) {\n }\n\n return NULL;\n}\n\n/* AST_t *parse_program(Parser_t *parser) { */\n\n/* AST_t *programAST = ast_create(AST_PROGRAM); */\n/* TokenType tknType = parser->next_token->type; */\n\n/* if (tknType == TOKEN_EOF) { */\n/* return programAST; */\n/* } else if(tknType == TOKEN_CLASS) { */\n/* return parse_class(parser); */\n/* } */\n/* } */\n"))) [client-notification] Wed Sep 20 08:28:24 2023: (:jsonrpc "2.0" :method "workspace/didChangeConfiguration" :params (:settings #s(hash-table size 1 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[client-request] (id:5) Wed Sep 20 08:28:33 2023: (:jsonrpc "2.0" :id 5 :method "textDocument/hover" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 106 :character 9))) [client-request] (id:6) Wed Sep 20 08:28:33 2023: (:jsonrpc "2.0" :id 6 :method "textDocument/documentHighlight" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 106 :character 9))) [client-request] (id:7) Wed Sep 20 08:28:33 2023: (:jsonrpc "2.0" :id 7 :method "textDocument/signatureHelp" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 106 :character 9))) [server-reply] (id:5) Wed Sep 20 08:28:33 2023: (:id 5 :jsonrpc "2.0" :result (:contents (:kind "markdown" :value "### variable `ast` \n\n---\nType: `AST_t * (aka struct AST_STRUCT *)` \n\n---\n```cpp\n// In parse_compound\nAST_t *ast = ast_create(AST_COMPOUND)\n```") :range (:end (:character 12 :line 106) :start (:character 9 :line 106)))) [server-reply] (id:6) Wed Sep 20 08:28:34 2023: (:id 6 :jsonrpc "2.0" :result [(:kind 1 :range (:end (:character 12 :line 106) :start (:character 9 :line 106)))]) [server-reply] (id:7) Wed Sep 20 08:28:34 2023: (:id 7 :jsonrpc "2.0" :result (:activeParameter 0 :activeSignature 0 :signatures [])) [client-request] (id:8) Wed Sep 20 08:28:35 2023: (:jsonrpc "2.0" :id 8 :method "textDocument/hover" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 9))) [client-request] (id:9) Wed Sep 20 08:28:35 2023: (:jsonrpc "2.0" :id 9 :method "textDocument/documentHighlight" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 9))) [client-request] (id:10) Wed Sep 20 08:28:35 2023: (:jsonrpc "2.0" :id 10 :method "textDocument/signatureHelp" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 9))) [server-reply] (id:8) Wed Sep 20 08:28:35 2023: (:id 8 :jsonrpc "2.0" :result nil) [server-reply] (id:9) Wed Sep 20 08:28:35 2023: (:id 9 :jsonrpc "2.0" :result []) [server-reply] (id:10) Wed Sep 20 08:28:35 2023: (:id 10 :jsonrpc "2.0" :result (:activeParameter 0 :activeSignature 0 :signatures [])) [client-request] (id:11) Wed Sep 20 08:28:36 2023: (:jsonrpc "2.0" :id 11 :method "textDocument/hover" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [client-request] (id:12) Wed Sep 20 08:28:36 2023: (:jsonrpc "2.0" :id 12 :method "textDocument/documentHighlight" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [client-request] (id:13) Wed Sep 20 08:28:36 2023: (:jsonrpc "2.0" :id 13 :method "textDocument/signatureHelp" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [server-reply] (id:11) Wed Sep 20 08:28:36 2023: (:id 11 :jsonrpc "2.0" :result nil) [server-reply] (id:12) Wed Sep 20 08:28:36 2023: (:id 12 :jsonrpc "2.0" :result []) [server-reply] (id:13) Wed Sep 20 08:28:36 2023: (:id 13 :jsonrpc "2.0" :result (:activeParameter 0 :activeSignature 0 :signatures [])) [client-request] (id:14) Wed Sep 20 08:28:37 2023: (:jsonrpc "2.0" :id 14 :method "textDocument/codeAction" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :range (:start (:line 101 :character 6) :end (:line 101 :character 8)) :context (:diagnostics []))) [server-reply] (id:14) Wed Sep 20 08:28:37 2023: (:id 14 :jsonrpc "2.0" :result []) [client-request] (id:15) Wed Sep 20 08:28:46 2023: (:jsonrpc "2.0" :id 15 :method "textDocument/codeAction" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :range (:start (:line 101 :character 6) :end (:line 101 :character 8)) :context (:diagnostics []))) [server-reply] (id:15) Wed Sep 20 08:28:46 2023: (:id 15 :jsonrpc "2.0" :result []) [client-request] (id:16) Wed Sep 20 08:30:53 2023: (:jsonrpc "2.0" :id 16 :method "textDocument/hover" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [client-request] (id:17) Wed Sep 20 08:30:53 2023: (:jsonrpc "2.0" :id 17 :method "textDocument/documentHighlight" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [client-request] (id:18) Wed Sep 20 08:30:53 2023: (:jsonrpc "2.0" :id 18 :method "textDocument/signatureHelp" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [server-reply] (id:16) Wed Sep 20 08:30:53 2023: (:id 16 :jsonrpc "2.0" :result nil) [server-reply] (id:17) Wed Sep 20 08:30:53 2023: (:id 17 :jsonrpc "2.0" :result []) [server-reply] (id:18) Wed Sep 20 08:30:53 2023: (:id 18 :jsonrpc "2.0" :result (:activeParameter 0 :activeSignature 0 :signatures [])) [client-request] (id:19) Wed Sep 20 08:38:43 2023: (:jsonrpc "2.0" :id 19 :method "textDocument/hover" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [client-request] (id:20) Wed Sep 20 08:38:43 2023: (:jsonrpc "2.0" :id 20 :method "textDocument/documentHighlight" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [client-request] (id:21) Wed Sep 20 08:38:43 2023: (:jsonrpc "2.0" :id 21 :method "textDocument/signatureHelp" :params (:textDocument (:uri "file:///home/aayush/projects/nicer/src/parser.c") :position (:line 101 :character 7))) [server-reply] (id:19) Wed Sep 20 08:38:43 2023: (:id 19 :jsonrpc "2.0" :result nil) [server-reply] (id:20) Wed Sep 20 08:38:43 2023: (:id 20 :jsonrpc "2.0" :result []) [server-reply] (id:21) Wed Sep 20 08:38:43 2023: (:id 21 :jsonrpc "2.0" :result (:activeParameter 0 :activeSignature 0 :signatures [])) [client-request] (id:22) Wed Sep 20 08:38:50 2023: (:jsonrpc "2.0" :id 22 :method "shutdown" :params nil) [server-reply] (id:22) Wed Sep 20 08:38:50 2023: (:id 22 :jsonrpc "2.0" :result nil) [client-notification] Wed Sep 20 08:38:50 2023: (:jsonrpc "2.0" :method "exit" :params nil) [internal] Wed Sep 20 08:38:50 2023: (:message "Connection state changed" :change "killed\n")

----------b---y---e---b---y---e----------
[stderr]
[stderr]
[stderr] nil
[stderr] nil
[stderr] Process EGLOT (nicer/(c-mode c++-mode)) stderr finished
[client-request] (id:1) Wed Sep 20 08:38:50 2023:
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())
:capabilities
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</details>

[joaotavora]

This works fine for me.

To be able to help you, I need to reproduce your case. Many people post "Eglot configuration" and that's not really what's necessary. What's really helpful is a full Emacs configuration under 10 lines, or even no configuration at all.

Here's an example of a reproduction recipe for the successful case with no configuration:

> emacs --version
GNU Emacs 29.1
Copyright (C) 2023 Free Software Foundation, Inc.
GNU Emacs comes with ABSOLUTELY NO WARRANTY.
> clangd --version
clangd version 16.0.6
Features: linux
Platform: x86_64-pc-linux-gnu
> emacs -Q something.cpp

Now type:

#include <iostream>
int main() {
  std::cout << "hello" // notice missing semicolon
}

Now type M-x eglot, goto the first Flymake error and press M-x eglot-code-actions. I get offered the code action to insert a ;.

[yaaama]

Emacs version:

GNU Emacs 29.1
Copyright (C) 2023 Free Software Foundation, Inc.
GNU Emacs comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GNU Emacs
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING.

Clangd version:

clangd version 16.0.6
Features: linux
Platform: x86_64-pc-linux-gnu

When I hover over it:

The code action I get suggested when I do "eglot-code-actions"

I am actually running Doom usually if that is of any help (I should have mentioned this in my original post).

[joaotavora]

Indeed, what happens here is that the code action to insert a ; is at point after the overlay. So you must press M-x eglot-code-actions
at that point, not at the underlining overlay.

If, instead of the cout we would have used printf, you can get the code action to insert a ; at the overlay.

I'll see if there's anything I can do on the Eglot side, but at any rate I think this experiments disproves your subject line that "Codeactions with Clangd [are] not functioning at all", so you might want to change that.

[joaotavora]

I'll see if there's anything I can do on the Eglot side,

I pushed a fix here: https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=76cdf293c480c3825eb99eae0ab863d185cf6570 to address the problem described above. This fix will make it into the upcoming 1.16 Eglot release or you can find it earlier in the GNU devel ELPA (https://elpa.gnu.org/devel/) archive.

I don't know if this will fix your Doom Emacs problem. It might, but I personally don't support Doom Emacs configurations for sheer lack of resources to run experiments there.

[yaaama]

Thank you sir, I have changed the title for this.

I believe something may be wrong with my Doom configuration as I am still unable to get any code actions to insert a ; when I am running my usual doom configuration.
I will mark this as closed, thank you again!