Use treesit-query-first-valid in c-ts-mode

* lisp/progmodes/c-ts-mode.el (c-ts-mode--font-lock-settings):
Use treesit-query-first-valid.  Use :default-language keyword.
(c-ts-mode--test-virtual-named-p): Remove function.

(cherry picked from commit e3b9de03e641cef5daeada4912fa711470697ba3)

diff --git a/lisp/progmodes/c-ts-mode.el b/lisp/progmodes/c-ts-mode.el
index 213c748ad2d4980d43f4ea207efd708b6adec5d2..c5bf135e286d7d894a7041b6c13ccbbd9cf45e14 100644 (file)
--- a/lisp/progmodes/c-ts-mode.el
+++ b/lisp/progmodes/c-ts-mode.el
@@ -706,22 +706,16 @@ MODE is either `c' or `cpp'."
   (rx (| "/**" "/*!" "//!" "///"))
   "A regexp that matches all doxygen comment styles.")
 
-(defun c-ts-mode--test-virtual-named-p ()
-  "Return t if the virtual keyword is a namded node, nil otherwise."
-  (ignore-errors
-    (progn (treesit-query-compile 'cpp "(virtual)" t) t)))
-
 (defun c-ts-mode--font-lock-settings (mode)
   "Tree-sitter font-lock settings.
 MODE is either `c' or `cpp'."
   (treesit-font-lock-rules
-   :language mode
+   :default-language mode
    :feature 'comment
    `(((comment) @font-lock-doc-face
       (:match ,(rx bos "/**") @font-lock-doc-face))
      (comment) @font-lock-comment-face)
 
-   :language mode
    :feature 'preprocessor
    `((preproc_directive) @font-lock-preprocessor-face
 
@@ -744,45 +738,37 @@ MODE is either `c' or `cpp'."
       ")" @font-lock-preprocessor-face)
      [,@c-ts-mode--preproc-keywords] @font-lock-preprocessor-face)
 
-   :language mode
    :feature 'constant
    `((true) @font-lock-constant-face
      (false) @font-lock-constant-face
      (null) @font-lock-constant-face)
 
-   :language mode
    :feature 'keyword
    `([,@(c-ts-mode--keywords mode)] @font-lock-keyword-face
      ,@(when (eq mode 'cpp)
          '((auto) @font-lock-keyword-face
            (this) @font-lock-keyword-face))
-     ,@(when (and (eq mode 'cpp)
-                  (c-ts-mode--test-virtual-named-p))
-         '((virtual) @font-lock-keyword-face))
-     ,@(when (and (eq mode 'cpp)
-                  (not (c-ts-mode--test-virtual-named-p)))
-         '("virtual" @font-lock-keyword-face)))
-
-   :language mode
+     ,@(when (eq mode 'cpp)
+         (treesit-query-first-valid 'cpp
+           '((virtual) @font-lock-keyword-face)
+           '("virtual" @font-lock-keyword-face))))
+
    :feature 'operator
    `([,@c-ts-mode--operators
       ,@(when (eq mode 'cpp) c-ts-mode--c++-operators)]
      @font-lock-operator-face
      "!" @font-lock-negation-char-face)
 
-   :language mode
    :feature 'string
    `((string_literal) @font-lock-string-face
      (system_lib_string) @font-lock-string-face
      ,@(when (eq mode 'cpp)
          '((raw_string_literal) @font-lock-string-face)))
 
-   :language mode
    :feature 'literal
    `((number_literal) @font-lock-number-face
      (char_literal) @font-lock-constant-face)
 
-   :language mode
    :feature 'type
    `((primitive_type) @font-lock-type-face
      (type_identifier) @font-lock-type-face
@@ -798,7 +784,6 @@ MODE is either `c' or `cpp'."
            (namespace_identifier) @font-lock-constant-face))
      [,@c-ts-mode--type-keywords] @font-lock-type-face)
 
-   :language mode
    :feature 'definition
    ;; Highlights identifiers in declarations.
    `(,@(when (eq mode 'cpp)
@@ -825,7 +810,6 @@ MODE is either `c' or `cpp'."
      (enumerator
       name: (identifier) @font-lock-property-name-face))
 
-   :language mode
    :feature 'assignment
    ;; TODO: Recursively highlight identifiers in parenthesized
    ;; expressions, see `c-ts-mode--fontify-declarator' for
@@ -842,44 +826,35 @@ MODE is either `c' or `cpp'."
              (identifier) @font-lock-variable-name-face))
      (init_declarator declarator: (_) @c-ts-mode--fontify-declarator))
 
-   :language mode
    :feature 'function
    '((call_expression
       function:
       [(identifier) @font-lock-function-call-face
        (field_expression field: (field_identifier) @font-lock-function-call-face)]))
 
-   :language mode
    :feature 'variable
    '((identifier) @c-ts-mode--fontify-variable)
 
-   :language mode
    :feature 'label
    '((labeled_statement
       label: (statement_identifier) @font-lock-constant-face))
 
-   :language mode
    :feature 'error
    '((ERROR) @c-ts-mode--fontify-error)
 
    :feature 'escape-sequence
-   :language mode
    :override t
    '((escape_sequence) @font-lock-escape-face)
 
-   :language mode
    :feature 'property
    '((field_identifier) @font-lock-property-use-face)
 
-   :language mode
    :feature 'bracket
    '((["(" ")" "[" "]" "{" "}"]) @font-lock-bracket-face)
 
-   :language mode
    :feature 'delimiter
    '((["," ":" ";"]) @font-lock-delimiter-face)
 
-   :language mode
    :feature 'emacs-devel
    :override t
    `(((call_expression