Fix C++ syntax highlighting, and improve C & WGSL highlighting (#4079)

runtime/queries/cpp/highlights.scm

@@ -1,5 +1,3 @@
-; inherits: c
-
 ; Functions
 
 (call_expression
@@ -12,56 +10,106 @@
 (template_method
   name: (field_identifier) @function)
 
-(template_function
-  name: (identifier) @function)
-
 (function_declarator
   declarator: (qualified_identifier
     name: (identifier) @function))
 
 (function_declarator
   declarator: (qualified_identifier
-    name: (identifier) @function))
+    name: (qualified_identifier
+      name: (identifier) @function)))
 
 (function_declarator
   declarator: (field_identifier) @function)
 
 ; Types
 
-((namespace_identifier) @type
- (#match? @type "^[A-Z]"))
+(using_declaration ("using" "namespace" (identifier) @namespace))
+(using_declaration ("using" "namespace" (qualified_identifier name: (identifier) @namespace)))
+(namespace_definition name: (identifier) @namespace)
+(namespace_identifier) @namespace
+
+(qualified_identifier name: (identifier) @type.enum.variant)
 
 (auto) @type
+"decltype" @type
 
 ; Constants
 
 (this) @variable.builtin
-(nullptr) @constant
+(nullptr) @constant.builtin
 
 ; Keywords
 
-"catch" @keyword
-"class" @keyword
-"constexpr" @keyword
-"delete" @keyword
-"explicit" @keyword
-"final" @keyword
-"friend" @keyword
-"mutable" @keyword
-"namespace" @keyword
-"noexcept" @keyword
-"new" @keyword
-"override" @keyword
-"private" @keyword
-"protected" @keyword
-"public" @keyword
-"template" @keyword
-"throw" @keyword
-"try" @keyword
-"typename" @keyword
-"using" @keyword
-"virtual" @keyword
+(template_argument_list (["<" ">"] @punctuation.bracket))
+(template_parameter_list (["<" ">"] @punctuation.bracket))
+(default_method_clause "default" @keyword)
+
+"static_assert" @function.special
+
+[
+  "<=>"
+  "[]"
+  "()"
+] @operator
+
+[
+  "co_await"
+  "co_return"
+  "co_yield"
+  "concept"
+  "delete"
+  "final"
+  "new"
+  "operator"
+  "requires"
+  "using"
+] @keyword
+
+[
+  "catch"
+  "noexcept"
+  "throw"
+  "try"
+] @keyword.control.exception
+
+
+[
+  "and"
+  "and_eq"
+  "bitor"
+  "bitand"
+  "not"
+  "not_eq"
+  "or"
+  "or_eq"
+  "xor"
+  "xor_eq"
+] @keyword.operator
+
+[
+  "class"  
+  "namespace"
+  "typename"
+] @keyword.storage.type
+
+[
+  "constexpr"
+  "constinit"
+  "consteval"
+  "explicit"
+  "friend"
+  "mutable"
+  "private"
+  "protected"
+  "public"
+  "override"
+  "template"
+  "virtual"
+] @keyword.storage.modifier
 
 ; Strings
 
 (raw_string_literal) @string
+
+; inherits: c