" Vim syntax file
" Language: Zig
" Maintainer: Andrew Kelley
" Latest Revision: 02 December 2015

if exists("b:current_syntax")
  finish
endif

syn keyword zigStorage const var extern volatile export pub noalias
syn keyword zigStructure struct enum
syn keyword zigStatement goto break return continue asm
syn keyword zigConditional if else switch
syn keyword zigRepeat while for

syn keyword zigConstant null
syn keyword zigKeyword fn import
syn keyword zigType bool i8 u8 i16 u16 i32 u32 i64 u64 isize usize f32 f64 f128 string void unreachable type

syn keyword zigBoolean true false

syn match zigOperator display "\%(+\|-\|/\|*\|=\|\^\|&\|?\||\|!\|>\|<\|%\)=\?"
syn match zigOperator display "&&\|||"
syn match zigArrowCharacter display "->"

syn match zigDecNumber display "\<[0-9][0-9_]*\%([iu]\%(size\|8\|16\|32\|64\)\)\="
syn match zigHexNumber display "\<0x[a-fA-F0-9_]\+\%([iu]\%(size\|8\|16\|32\|64\)\)\="
syn match zigOctNumber display "\<0o[0-7_]\+\%([iu]\%(size\|8\|16\|32\|64\)\)\="
syn match zigBinNumber display "\<0b[01_]\+\%([iu]\%(size\|8\|16\|32\|64\)\)\="


syn match zigCharacterInvalid display contained /b\?'\zs[\n\r\t']\ze'/
syn match zigCharacterInvalidUnicode display contained /b'\zs[^[:cntrl:][:graph:][:alnum:][:space:]]\ze'/
syn match zigCharacter /b'\([^\\]\|\\\(.\|x\x\{2}\)\)'/ contains=zigEscape,zigEscapeError,zigCharacterInvalid,zigCharacterInvalidUnicode
syn match zigCharacter /'\([^\\]\|\\\(.\|x\x\{2}\|u\x\{4}\|U\x\{8}\|u{\x\{1,6}}\)\)'/ contains=zigEscape,zigEscapeUnicode,zigEscapeError,zigCharacterInvalid

syn match zigShebang /\%^#![^[].*/

syn region zigCommentLine start="//" end="$" contains=zigTodo,@Spell
syn region zigCommentLineDoc start="//\%(//\@!\|!\)" end="$" contains=zigTodo,@Spell
syn region zigCommentBlock matchgroup=zigCommentBlock start="/\*\%(!\|\*[*/]\@!\)\@!" end="\*/" contains=zigTodo,zigCommentBlockNest,@Spell
syn region zigCommentBlockDoc matchgroup=zigCommentBlockDoc start="/\*\%(!\|\*[*/]\@!\)" end="\*/" contains=zigTodo,zigCommentBlockDocNest,@Spell
syn region zigCommentBlockNest matchgroup=zigCommentBlock start="/\*" end="\*/" contains=zigTodo,zigCommentBlockNest,@Spell contained transparent
syn region zigCommentBlockDocNest matchgroup=zigCommentBlockDoc start="/\*" end="\*/" contains=zigTodo,zigCommentBlockDocNest,@Spell contained transparent

syn keyword zigTodo contained TODO XXX

syn match     zigEscapeError   display contained /\\./
syn match     zigEscape        display contained /\\\([nrt0\\'"]\|x\x\{2}\)/
syn match     zigEscapeUnicode display contained /\\\(u\x\{4}\|U\x\{8}\)/
syn match     zigEscapeUnicode display contained /\\u{\x\{1,6}}/
syn match     zigStringContinuation display contained /\\\n\s*/
syn region    zigString      start=+c\?"+ skip=+\\\\\|\\"+ end=+"+ contains=zigEscape,zigEscapeUnicode,zigEscapeError,zigStringContinuation,@Spell
syn region    zigString      start='b\?r\z(#*\)"' end='"\z1' contains=@Spell

let b:current_syntax = "zig"

hi def link zigDecNumber zigNumber
hi def link zigHexNumber zigNumber
hi def link zigOctNumber zigNumber
hi def link zigBinNumber zigNumber

hi def link zigKeyword Keyword
hi def link zigType Type
hi def link zigShebang Comment
hi def link zigCommentLine Comment
hi def link zigCommentLineDoc SpecialComment
hi def link zigCommentBlock zigCommentLine
hi def link zigCommentBlockDoc zigCommentLineDoc
hi def link zigTodo Todo
hi def link zigStringContinuation Special
hi def link zigString String
hi def link zigCharacterInvalid Error
hi def link zigCharacterInvalidUnicode zigCharacterInvalid
hi def link zigCharacter Character
hi def link zigEscape Special
hi def link zigEscapeUnicode zigEscape
hi def link zigEscapeError Error
hi def link zigBoolean Boolean
hi def link zigConstant Constant
hi def link zigNumber Number
hi def link zigArrowCharacter zigOperator
hi def link zigOperator Operator
hi def link zigStorage StorageClass
hi def link zigStructure Structure
hi def link zigStatement Statement
hi def link zigConditional Conditional
hi def link zigRepeat Repeat