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" PRELUDE {{{1
" Vim syntax file
" Language: Hare
" Maintainer: Amelia Clarke <me@rsaihe.dev>
" Last Change: 2022-09-21
if exists("b:current_syntax")
finish
endif
let b:current_syntax = "hare"
" SYNTAX {{{1
syn case match
" KEYWORDS {{{2
syn keyword hareConditional if else match switch
syn keyword hareKeyword break continue return yield
syn keyword hareKeyword defer
syn keyword hareKeyword fn
syn keyword hareKeyword let
syn keyword hareLabel case
syn keyword hareOperator as is
syn keyword hareRepeat for
syn keyword hareStorageClass const def export nullable static
syn keyword hareStructure enum struct union
syn keyword hareTypedef type
" C ABI.
syn keyword hareKeyword vastart vaarg vaend
" BUILTINS {{{2
syn keyword hareBuiltin abort
syn keyword hareBuiltin alloc free
syn keyword hareBuiltin append delete insert
syn keyword hareBuiltin assert
syn keyword hareBuiltin len offset
" TYPES {{{2
syn keyword hareType bool
syn keyword hareType char str
syn keyword hareType f32 f64
syn keyword hareType u8 u16 u32 u64 i8 i16 i32 i64
syn keyword hareType uint int
syn keyword hareType rune
syn keyword hareType uintptr
syn keyword hareType void
" C ABI.
syn keyword hareType valist
" LITERALS {{{2
syn keyword hareBoolean true false
syn keyword hareNull null
" Number literals.
syn match hareNumber "\v(\.@1<!|\.\.)\zs<\d+([Ee][+-]?\d+)?(z|[iu](8|16|32|64)?)?>" display
syn match hareNumber "\v(\.@1<!|\.\.)\zs<0b[01]+(z|[iu](8|16|32|64)?)?>" display
syn match hareNumber "\v(\.@1<!|\.\.)\zs<0o\o+(z|[iu](8|16|32|64)?)?>" display
syn match hareNumber "\v(\.@1<!|\.\.)\zs<0x\x+(z|[iu](8|16|32|64)?)?>" display
" Floating-point number literals.
syn match hareFloat "\v<\d+\.\d+([Ee][+-]?\d+)?(f32|f64)?>" display
syn match hareFloat "\v<\d+([Ee][+-]?\d+)?(f32|f64)>" display
" String and rune literals.
syn match hareEscape "\\[\\'"0abfnrtv]" contained display
syn match hareEscape "\v\\(x\x{2}|u\x{4}|U\x{8})" contained display
syn match hareFormat "\v\{\d*(\%\d*|(:[ 0+-]?\d*(\.\d+)?[Xbox]?))?}" contained display
syn match hareFormat "\({{\|}}\)" contained display
syn region hareRune start="'" end="'\|$" skip="\\'" contains=hareEscape display extend
syn region hareString start=+"+ end=+"\|$+ skip=+\\"+ contains=hareEscape,hareFormat display extend
syn region hareString start="`" end="`\|$" contains=hareFormat display
" MISCELLANEOUS {{{2
syn keyword hareTodo FIXME TODO XXX contained
" Attributes.
syn match hareAttribute "@[a-z]*"
" Blocks.
syn region hareBlock start="{" end="}" fold transparent
" Comments.
syn region hareComment start="//" end="$" contains=hareCommentDoc,hareTodo,@Spell display keepend
syn region hareCommentDoc start="\[\[" end="]]\|\ze\_s" contained display
" The size keyword can be either a builtin or a type.
syn match hareBuiltin "\v<size>\ze(\_s*//.*\_$)*\_s*\(" contains=hareComment
syn match hareType "\v<size>((\_s*//.*\_$)*\_s*\()@!" contains=hareComment
" Trailing whitespace.
syn match hareSpaceError "\v\s+$" display excludenl
syn match hareSpaceError "\v\zs +\ze\t" display
" Use statement.
syn region hareUse start="\v^\s*\zsuse>" end=";" contains=hareComment display
syn match hareErrorAssertion "\v(^([^/]|//@!)*\)\_s*)@<=!\=@!"
syn match hareQuestionMark "?"
" DEFAULT HIGHLIGHTING {{{1
hi def link hareAttribute Keyword
hi def link hareBoolean Boolean
hi def link hareBuiltin Function
hi def link hareComment Comment
hi def link hareCommentDoc SpecialComment
hi def link hareConditional Conditional
hi def link hareEscape SpecialChar
hi def link hareFloat Float
hi def link hareFormat SpecialChar
hi def link hareKeyword Keyword
hi def link hareLabel Label
hi def link hareNull Constant
hi def link hareNumber Number
hi def link hareOperator Operator
hi def link hareQuestionMark Special
hi def link hareRepeat Repeat
hi def link hareRune Character
hi def link hareStorageClass StorageClass
hi def link hareString String
hi def link hareStructure Structure
hi def link hareTodo Todo
hi def link hareType Type
hi def link hareTypedef Typedef
hi def link hareUse PreProc
hi def link hareSpaceError Error
autocmd InsertEnter * hi link hareSpaceError NONE
autocmd InsertLeave * hi link hareSpaceError Error
hi def hareErrorAssertion ctermfg=red cterm=bold guifg=red gui=bold
" vim: tabstop=8 shiftwidth=2 expandtab
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