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-rw-r--r--runtime/syntax/cpp.vim130
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diff --git a/runtime/syntax/cpp.vim b/runtime/syntax/cpp.vim
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+++ b/runtime/syntax/cpp.vim
@@ -0,0 +1,130 @@
+" Vim syntax file
+" Language: C++
+" Current Maintainer: vim-jp (https://github.com/vim-jp/vim-cpp)
+" Previous Maintainer: Ken Shan <ccshan@post.harvard.edu>
+" Last Change: 2023 Dec 08
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+ finish
+endif
+
+" inform C syntax that the file was included from cpp.vim
+let b:filetype_in_cpp_family = 1
+
+" Read the C syntax to start with
+runtime! syntax/c.vim
+unlet b:current_syntax
+unlet b:filetype_in_cpp_family
+
+" C++ extensions
+syn keyword cppStatement new delete this friend using
+syn keyword cppAccess public protected private
+syn keyword cppModifier inline virtual explicit export
+syn keyword cppType bool wchar_t
+syn keyword cppExceptions throw try catch
+syn keyword cppOperator operator typeid
+syn keyword cppOperator and bitor or xor compl bitand and_eq or_eq xor_eq not not_eq
+syn match cppCast "\<\(const\|static\|dynamic\|reinterpret\)_cast\s*<"me=e-1
+syn match cppCast "\<\(const\|static\|dynamic\|reinterpret\)_cast\s*$"
+syn keyword cppStorageClass mutable
+syn keyword cppStructure class typename template namespace
+syn keyword cppBoolean true false
+syn keyword cppConstant __cplusplus
+
+" C++ 11 extensions
+if !exists("cpp_no_cpp11")
+ syn keyword cppModifier override final
+ syn keyword cppType nullptr_t auto
+ syn keyword cppExceptions noexcept
+ syn keyword cppStorageClass constexpr decltype thread_local
+ syn keyword cppConstant nullptr
+ syn keyword cppConstant ATOMIC_FLAG_INIT ATOMIC_VAR_INIT
+ syn keyword cppConstant ATOMIC_BOOL_LOCK_FREE ATOMIC_CHAR_LOCK_FREE
+ syn keyword cppConstant ATOMIC_CHAR16_T_LOCK_FREE ATOMIC_CHAR32_T_LOCK_FREE
+ syn keyword cppConstant ATOMIC_WCHAR_T_LOCK_FREE ATOMIC_SHORT_LOCK_FREE
+ syn keyword cppConstant ATOMIC_INT_LOCK_FREE ATOMIC_LONG_LOCK_FREE
+ syn keyword cppConstant ATOMIC_LLONG_LOCK_FREE ATOMIC_POINTER_LOCK_FREE
+ syn region cppRawString matchgroup=cppRawStringDelimiter start=+\%(u8\|[uLU]\)\=R"\z([[:alnum:]_{}[\]#<>%:;.?*\+\-/\^&|~!=,"']\{,16}\)(+ end=+)\z1"\(sv\|s\|_[_a-zA-Z][_a-zA-Z0-9]*\)\=+ contains=@Spell
+ syn match cppCast "\<\(const\|static\|dynamic\)_pointer_cast\s*<"me=e-1
+ syn match cppCast "\<\(const\|static\|dynamic\)_pointer_cast\s*$"
+endif
+
+" C++ 14 extensions
+if !exists("cpp_no_cpp14")
+ syn match cppNumbers display transparent "\<\d\|\.\d" contains=cppNumber,cppFloat
+ syn match cppNumber display contained "\<0\([Uu]\=\([Ll]\|LL\|ll\)\|\([Ll]\|LL\|ll\)\=[Uu]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppNumber display contained "\<[1-9]\('\=\d\+\)*\([Uu]\=\([Ll]\|LL\|ll\)\|\([Ll]\|LL\|ll\)\=[Uu]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppNumber display contained "\<0\o\+\([Uu]\=\([Ll]\|LL\|ll\)\|\([Ll]\|LL\|ll\)\=[Uu]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppNumber display contained "\<0b[01]\('\=[01]\+\)*\([Uu]\=\([Ll]\|LL\|ll\)\|\([Ll]\|LL\|ll\)\=[Uu]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppNumber display contained "\<0x\x\('\=\x\+\)*\([Uu]\=\([Ll]\|LL\|ll\)\|\([Ll]\|LL\|ll\)\=[Uu]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppFloat display contained "\<\d\+\.\d*\(e[-+]\=\d\+\)\=\([FfLl]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppFloat display contained "\<\.\d\+\(e[-+]\=\d\+\)\=\([FfLl]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppFloat display contained "\<\d\+e[-+]\=\d\+\([FfLl]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn region cppString start=+\(L\|u\|u8\|U\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"\(sv\|s\|_\i*\)\=+ end='$' contains=cSpecial,cFormat,@Spell
+endif
+
+" C++ 17 extensions
+if !exists("cpp_no_cpp17")
+ syn match cppCast "\<reinterpret_pointer_cast\s*<"me=e-1
+ syn match cppCast "\<reinterpret_pointer_cast\s*$"
+ syn match cppFloat display contained "\<0x\x*\.\x\+p[-+]\=\d\+\([FfLl]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+ syn match cppFloat display contained "\<0x\x\+\.\=p[-+]\=\d\+\([FfLl]\|i[fl]\=\|h\|min\|s\|ms\|us\|ns\|_\i*\)\=\>"
+
+ " TODO: push this up to c.vim if/when supported in C23
+ syn match cppCharacter "u8'[^\\]'"
+ syn match cppCharacter "u8'[^']*'" contains=cSpecial
+ if exists("c_gnu")
+ syn match cppSpecialError "u8'\\[^'\"?\\abefnrtv]'"
+ syn match cppSpecialCharacter "u8'\\['\"?\\abefnrtv]'"
+ else
+ syn match cppSpecialError "u8'\\[^'\"?\\abfnrtv]'"
+ syn match cppSpecialCharacter "u8'\\['\"?\\abfnrtv]'"
+ endif
+ syn match cppSpecialCharacter display "u8'\\\o\{1,3}'"
+ syn match cppSpecialCharacter display "u8'\\x\x\+'"
+
+endif
+
+" C++ 20 extensions
+if !exists("cpp_no_cpp20")
+ syn match cppNumber display contained "\<0\(y\|d\)\>"
+ syn match cppNumber display contained "\<[1-9]\('\=\d\+\)*\(y\|d\)\>"
+ syn match cppNumber display contained "\<0\o\+\(y\|d\)\>"
+ syn match cppNumber display contained "\<0b[01]\('\=[01]\+\)*\(y\|d\)\>"
+ syn match cppNumber display contained "\<0x\x\('\=\x\+\)*\(y\|d\)\>"
+ syn keyword cppStatement co_await co_return co_yield requires
+ syn keyword cppStorageClass consteval constinit
+ syn keyword cppStructure concept
+ syn keyword cppType char8_t
+ syn keyword cppModule import module export
+endif
+
+" The minimum and maximum operators in GNU C++
+syn match cppMinMax "[<>]?"
+
+" Default highlighting
+hi def link cppAccess cppStatement
+hi def link cppCast cppStatement
+hi def link cppExceptions Exception
+hi def link cppOperator Operator
+hi def link cppStatement Statement
+hi def link cppModifier Type
+hi def link cppType Type
+hi def link cppStorageClass StorageClass
+hi def link cppStructure Structure
+hi def link cppBoolean Boolean
+hi def link cppCharacter cCharacter
+hi def link cppSpecialCharacter cSpecialCharacter
+hi def link cppSpecialError cSpecialError
+hi def link cppConstant Constant
+hi def link cppRawStringDelimiter Delimiter
+hi def link cppRawString String
+hi def link cppString String
+hi def link cppNumber Number
+hi def link cppFloat Number
+hi def link cppModule Include
+
+let b:current_syntax = "cpp"
+
+" vim: ts=8