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runtime(c): classify type qualifiers, function specifiers and C23 attributes

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Move const, volatile, restrict and _Atomic to a new cTypeQualifier group
and inline and _Noreturn to cFunctionSpec. Add the C23 standard attributes
deprecated, fallthrough, maybe_unused, nodiscard, unsequenced and
reproducible as cStandardAttribute, and reclassify the existing noreturn
into the same group.

The new groups link to cStorageClass, so the default highlighting and any
existing cStorageClass override are unchanged, while allowing finer-grained
customization.

fixes:  #19574
closes: #20368

Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Yasuhiro Matsumoto
2026-06-01 21:04:08 +00:00
committed by Christian Brabandt
parent 64982d6010
commit 77b2376769
1 changed files with 19 additions and 9 deletions
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runtime/syntax/c.vim
+19 -9
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@@ -1,7 +1,7 @@
" Vim syntax file
" Language: C
" Maintainer: The Vim Project <https://github.com/vim/vim>
" Last Change: 2026 Jan 13
" Last Change: 2026 Jun 01
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
" Quit when a (custom) syntax file was already loaded
@@ -278,9 +278,9 @@ if exists("c_gnu")
syn keyword cOperator __alignof__
syn keyword cOperator typeof __typeof__
syn keyword cOperator __real__ __imag__
syn keyword cStorageClass __attribute__ __const__ __extension__
syn keyword cStorageClass inline __inline __inline__
syn keyword cStorageClass __restrict__ __volatile__ __noreturn__
syn keyword cStorageClass __attribute__ __extension__
syn keyword cTypeQualifier __const__ __restrict__ __volatile__
syn keyword cFunctionSpec inline __inline __inline__ __noreturn__
endif
syn keyword cType int long short char void
syn keyword cType signed unsigned float double
@@ -314,9 +314,11 @@ endif
syn keyword cTypedef typedef
syn keyword cStructure struct union enum
syn keyword cStorageClass static register auto volatile extern const
syn keyword cStorageClass static register auto extern
syn keyword cTypeQualifier const volatile
if !exists("c_no_c99") && !s:in_cpp_family
syn keyword cStorageClass inline restrict
syn keyword cFunctionSpec inline
syn keyword cTypeQualifier restrict
endif
if (s:ft ==# "c" && !exists("c_no_c23")) || (s:in_cpp_family && !exists("cpp_no_cpp11"))
syn keyword cStorageClass constexpr
@@ -324,11 +326,11 @@ endif
if !exists("c_no_c11")
syn keyword cStorageClass _Alignas alignas
syn keyword cOperator _Alignof alignof
syn keyword cStorageClass _Atomic
syn keyword cTypeQualifier _Atomic
syn keyword cOperator _Generic
syn keyword cStorageClass _Noreturn
syn keyword cFunctionSpec _Noreturn
if !s:in_cpp_family
syn keyword cStorageClass noreturn
syn keyword cStandardAttribute noreturn
endif
syn keyword cOperator _Static_assert static_assert
syn keyword cStorageClass _Thread_local thread_local
@@ -352,6 +354,11 @@ if !exists("c_no_c11")
syn keyword cType atomic_intmax_t atomic_uintmax_t
endif
if !exists("c_no_c23") && !s:in_cpp_family
syn keyword cStandardAttribute deprecated fallthrough maybe_unused nodiscard
syn keyword cStandardAttribute unsequenced reproducible
endif
if (s:ft ==# "c" && !exists("c_no_c23")) || (s:in_cpp_family && !exists("cpp_no_cpp20"))
syn keyword cType char8_t
endif
@@ -606,6 +613,9 @@ hi def link cOperator Operator
hi def link cStructure Structure
hi def link cTypedef Structure
hi def link cStorageClass StorageClass
hi def link cTypeQualifier cStorageClass
hi def link cFunctionSpec cStorageClass
hi def link cStandardAttribute cStorageClass
hi def link cInclude Include
hi def link cPreProc PreProc
hi def link cDefine Macro