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Merged
deathaxe merged 3 commits into from
Apr 24, 2026
Merged

[C/C++] Add attributes #4523

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d0a51a7
Added attributes to C/C++
12Thanjo Apr 16, 2026
349e9c9
Fixed C syntax test, and removed a push level in C++ attributes
12Thanjo Apr 16, 2026
3960af9
Fixed , in C attributes not having scope punctuation.separator.c
12Thanjo Apr 16, 2026
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45 changes: 42 additions & 3 deletions C++/C++.sublime-syntax
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Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,12 @@ variables:
data_structures_forward_decl_lookahead: '(\s+{{macro_identifier}})*\s*(:\s*({{path_lookahead}}|{{visibility_modifiers}}|,|\s|<[^;]*>)+)?;'
non_func_keywords: 'if|for|switch|while|decltype|sizeof|__declspec|__attribute__|typeid|alignof|alignas|static_assert'

attribute_token: '({{identifier}}|{{identifier}}::{{identifier}}|{{identifier}}\(.*\)|{{identifier}}::{{identifier}}\(.*\))'
attribute_list: '({{attribute_token}}|({{attribute_token}},\s*)+({{attribute_token}}|\.\.\.))'
attribute_namespace_list: '(using\s+{{identifier}}:\s*{{attribute_list}})'
attribute_body: '{{attribute_list}}|{{attribute_namespace_list}}'


contexts:
main:
- include: preprocessor-global
Expand Down Expand Up @@ -309,7 +315,7 @@ contexts:
- include: global
- match: (?=\S)
set: global-modifier
- match: ^\s*(?=\w)
- match: ^\s*(?=(\w|\[\[{{attribute_body}}\]\]))
push: global-modifier
- include: late-expressions

Expand Down Expand Up @@ -447,7 +453,40 @@ contexts:
operators:
- include: scope:source.c#operators

attribute_list:
- meta_scope: meta.attribute.c++
- match: '\b(noreturn|carries_dependency|deprecated|fallthrough|maybe_unused|nodiscard|likely|unlikely|no_unique_address|assume|indeterminate)\b'
scope: storage.modifier.c++
- include: parens
- match: ','
scope: punctuation.separator.c++
- match: '\.\.\.'
scope: keyword.operator.variadic.c++
- match: \]\]
scope: punctuation.section.attribute.end.c++
pop: true

attributes:
- match: '\[\[(?={{attribute_namespace_list}}\]\])'
scope: punctuation.section.attribute.begin.c++
push:
- meta_scope: meta.attribute.c++
- match: 'using'
scope: keyword.control.c++
push:
- match: '{{identifier}}'
push:
- match: ':'
scope: punctuation.separator.c++
pop: 2
- match: (?=)
set: attribute_list
- match: '\[\[(?={{attribute_list}}\]\])'
scope: punctuation.section.attribute.begin.c++
push: attribute_list

modifiers:
- include: attributes
- include: unique-modifiers
- include: scope:source.c#modifiers

Expand Down Expand Up @@ -1031,7 +1070,7 @@ contexts:
- include: expressions

brackets:
- match: \[
- match: \[(?!\[{{attribute_body}}\]\])
scope: punctuation.section.brackets.begin.c++
push:
- meta_scope: meta.brackets.c++
Expand Down Expand Up @@ -1553,7 +1592,7 @@ contexts:
captures:
1: storage.modifier.c++
2: punctuation.section.class.c++
- match: '^\s*(?=(?:~?\w+|::))'
- match: '^\s*(?=(?:~?\w+|::|\[\[{{attribute_body}}\]\]))'
push: data-structures-modifier
- include: expressions-minus-generic-type

Expand Down
20 changes: 18 additions & 2 deletions C++/C.sublime-syntax
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,9 @@ variables:
modifiers: '{{storage_classes}}|{{type_qualifier}}|{{compiler_directive}}'
non_func_keywords: 'if|for|switch|while|decltype|typeof|typeof_unqual|_Atomic|_BitInt|sizeof|alignof|_Alignof|alignas|_Alignas|static_assert|_Static_assert|__declspec|__attribute__'

attribute_token: '({{identifier}}|{{identifier}}::{{identifier}}|{{identifier}}\(.*\)|{{identifier}}::{{identifier}}\(.*\))'
attribute_list: '({{attribute_token}}|({{attribute_token}},\s*)+{{attribute_token}})'

contexts:
main:
- include: preprocessor-global
Expand Down Expand Up @@ -231,9 +234,22 @@ contexts:
- match: \b(sizeof|alignof|_Alignof|static_assert|_Static_assert)\b
scope: keyword.operator.word.c

attributes:
- match: '\[\[(?={{attribute_list}}\]\])'
scope: punctuation.section.attribute.begin.c
push:
- meta_scope: meta.attribute.c
- match: '\b(deprecated|__deprecated__|fallthrough|__fallthrough__|nodiscard|__nodiscard__|maybe_unused|__maybe_unused__|noreturn|__noreturn__|unsequenced|__unsequenced__|reproducible|__reproducible__)\b'
scope: storage.modifier.c
- include: parens
- match: \]\]
scope: punctuation.section.attribute.end.c
pop: true

modifiers:
- match: \b({{modifiers}})\b
scope: storage.modifier.c
- include: attributes

variables:
- match: '\bg[A-Z]\w*\b'
Expand Down Expand Up @@ -524,7 +540,7 @@ contexts:

global:
- include: early-expressions
- match: '^\s*(?=\w+)'
- match: '^\s*(?=\w+|\[\[{{attribute_list}}\]\])'
push: global-modifier
- include: late-expressions

Expand Down Expand Up @@ -884,7 +900,7 @@ contexts:
- include: expressions

brackets:
- match: \[
- match: \[(?!\[{{attribute_list}}\]\])
scope: punctuation.section.brackets.begin.c
push:
- meta_scope: meta.brackets.c
Expand Down
34 changes: 34 additions & 0 deletions C++/syntax_test_c.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1151,6 +1151,40 @@ __notdeclspec(deprecated("bla")) void func2(int) {}
/* <- meta.function-call variable.function */
/* ^ entity.name.function */



inline [[nodiscard]] [[gnu::hot]] static void nodiscard_func();
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/* <- storage.modifier.c++ */
/* ^^^^^^^^^^^^^ meta.attribute.c++ */
/* ^^ punctuation.section.attribute.begin.c++ */
/* ^^^^^^^^^ storage.modifier.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^ meta.attribute.c++ */
/* ^^ punctuation.section.attribute.begin.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^ storage.modifier.c++ */
/* ^^^^^^^^^^^^^^ entity.name.function.c++ */


[[deprecated("no longer used")]] void attribute_with_arg_func();
/* <-- meta.attribute.c++ punctuation.section.attribute.begin.c++> */
/*^^^^^^^^^^ storage.modifier.c++ */
/* ^^^^^^^^^^^^^^^^^^ meta.group.c++ */
/* ^^^^^^^^^^^^^^^ string.quoted.double.c */
/* ^ punctuation.section.group.end.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^^^^^^^^^^^^ entity.name.function.c */

inline [[gnu::always_inline, nodiscard]] void gnu_attributes_func();
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ meta.attribute.c++ */
/* ^^ meta.attribute.c++ punctuation.section.attribute.begin.c++ */
/* ^ meta.attribute.c++ punctuation.separator.c++ */
/* ^^^^^^^^^ meta.attribute.c++ storage.modifier.c++ */
/* ^^ meta.attribute.c++ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^^^^^^^^ entity.name.function.c++ */



/////////////////////////////////////////////
// Test function call in function parameters
/////////////////////////////////////////////
Expand Down
56 changes: 56 additions & 0 deletions C++/syntax_test_cpp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1827,6 +1827,62 @@ long double operator "" _km (long double x);
/* ^^^^^^^^^^^^^^^ meta.function.parameters */
/* ^^^^^^^^^^^^^^^ entity.name.function */



inline [[nodiscard]] [[gnu::hot]] static auto nodiscard_func() -> void;
/* <- storage.modifier.c++ */
/* ^^^^^^^^^^^^^ meta.attribute.c++ */
/* ^^ punctuation.section.attribute.begin.c++ */
/* ^^^^^^^^^ storage.modifier.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^ meta.attribute.c++ */
/* ^^ punctuation.section.attribute.begin.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^ storage.modifier.c++ */
/* ^^^^^^^^^^^^^^ entity.name.function.c++ */


[[deprecated("no longer used")]] static auto attribute_with_arg_func() -> void;
/* <-- meta.attribute.c++ punctuation.section.attribute.begin.c++> */
/*^^^^^^^^^^ storage.modifier.c++ */
/* ^^^^^^^^^^^^^^^^^^ meta.group.c++ */
/* ^^^^^^^^^^^^^^^ string.quoted.double.c */
/* ^ punctuation.section.group.end.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^^^^^^^^^^^ entity.name.function.c++ */

inline [[gnu::always_inline, nodiscard]] constexpr auto gnu_attributes_func() -> void;
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ meta.attribute.c++ */
/* ^^ meta.attribute.c++ punctuation.section.attribute.begin.c++ */
/* ^ meta.attribute.c++ punctuation.separator.c++ */
/* ^^^^^^^^^ meta.attribute.c++ storage.modifier.c++ */
/* ^^ meta.attribute.c++ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^^^^^^^^ entity.name.function.c++ */

[[using gnu: always_inline, hot]] constexpr auto gnu_namespace_attributes_func() -> void;
/* <- meta.attribute.c++ punctuation.section.attribute.begin.c++ */
/*^^^^^ meta.attribute.c++ keyword.control.c++ */
/* ^ meta.attribute.c++ punctuation.separator.c++ */
/* ^ meta.attribute.c++ punctuation.separator.c++ */
/* ^^ meta.attribute.c++ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ entity.name.function.c++ */

struct S{

[[noreturn, ...]] static auto pack_attribute_func() -> void;
/* ^^^^^^^^^^^^^^^^^ meta.block.c++ meta.attribute.c++ */
/* ^^ punctuation.section.attribute.begin.c++ */
/* ^^^^^^^^ storage.modifier.c++ */
/* ^ punctuation.separator.c++ */
/* ^^^ keyword.operator.variadic.c++ */
/* ^^ punctuation.section.attribute.end.c++ */
/* ^^^^^^^^^^^^^^^^^^^ entity.name.function.c++ */

}




/////////////////////////////////////////////
// Namespace
/////////////////////////////////////////////
Expand Down
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