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" Vim syntax file
" Language: Go
" Maintainer: David Barnett (https://github.com/google/vim-ft-go)
" Last Change: 2014 Aug 16
" Options:
" There are some options for customizing the highlighting; the recommended
" settings are the default values, but you can write:
" let OPTION_NAME = 0
" in your ~/.vimrc file to disable particular options. You can also write:
" let OPTION_NAME = 1
" to enable particular options. At present, all options default to on.
"
" - g:go_highlight_array_whitespace_error
" Highlights white space after "[]".
" - g:go_highlight_chan_whitespace_error
" Highlights white space around the communications operator that don't
" follow the standard style.
" - g:go_highlight_extra_types
" Highlights commonly used library types (io.Reader, etc.).
" - g:go_highlight_space_tab_error
" Highlights instances of tabs following spaces.
" - g:go_highlight_trailing_whitespace_error
" Highlights trailing white space.
" Quit when a (custom) syntax file was already loaded
if exists('b:current_syntax')
finish
endif
if !exists('g:go_highlight_array_whitespace_error')
let g:go_highlight_array_whitespace_error = 1
endif
if !exists('g:go_highlight_chan_whitespace_error')
let g:go_highlight_chan_whitespace_error = 1
endif
if !exists('g:go_highlight_extra_types')
let g:go_highlight_extra_types = 1
endif
if !exists('g:go_highlight_space_tab_error')
let g:go_highlight_space_tab_error = 1
endif
if !exists('g:go_highlight_trailing_whitespace_error')
let g:go_highlight_trailing_whitespace_error = 1
endif
syn case match
syn keyword goDirective package import
syn keyword goDeclaration var const type
syn keyword goDeclType struct interface
hi def link goDirective Statement
hi def link goDeclaration Keyword
hi def link goDeclType Keyword
" Keywords within functions
syn keyword goStatement defer go goto return break continue fallthrough
syn keyword goConditional if else switch select
syn keyword goLabel case default
syn keyword goRepeat for range
hi def link goStatement Statement
hi def link goConditional Conditional
hi def link goLabel Label
hi def link goRepeat Repeat
" Predefined types
syn keyword goType chan map bool string error
syn keyword goSignedInts int int8 int16 int32 int64 rune
syn keyword goUnsignedInts byte uint uint8 uint16 uint32 uint64 uintptr
syn keyword goFloats float32 float64
syn keyword goComplexes complex64 complex128
hi def link goType Type
hi def link goSignedInts Type
hi def link goUnsignedInts Type
hi def link goFloats Type
hi def link goComplexes Type
" Treat func specially: it's a declaration at the start of a line, but a type
" elsewhere. Order matters here.
syn match goType /\<func\>/
syn match goDeclaration /^func\>/
" Predefined functions and values
syn keyword goBuiltins append cap close complex copy delete imag len
syn keyword goBuiltins make new panic print println real recover
syn keyword goConstants iota true false nil
hi def link goBuiltins Keyword
hi def link goConstants Keyword
" Comments; their contents
syn keyword goTodo contained TODO FIXME XXX BUG
syn cluster goCommentGroup contains=goTodo
syn region goComment start="/\*" end="\*/" contains=@goCommentGroup,@Spell
syn region goComment start="//" end="$" contains=@goCommentGroup,@Spell
hi def link goComment Comment
hi def link goTodo Todo
" Go escapes
syn match goEscapeOctal display contained "\\[0-7]\{3}"
syn match goEscapeC display contained +\\[abfnrtv\\'"]+
syn match goEscapeX display contained "\\x\x\{2}"
syn match goEscapeU display contained "\\u\x\{4}"
syn match goEscapeBigU display contained "\\U\x\{8}"
syn match goEscapeError display contained +\\[^0-7xuUabfnrtv\\'"]+
hi def link goEscapeOctal goSpecialString
hi def link goEscapeC goSpecialString
hi def link goEscapeX goSpecialString
hi def link goEscapeU goSpecialString
hi def link goEscapeBigU goSpecialString
hi def link goSpecialString Special
hi def link goEscapeError Error
" Strings and their contents
syn cluster goStringGroup contains=goEscapeOctal,goEscapeC,goEscapeX,goEscapeU,goEscapeBigU,goEscapeError
syn region goString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@goStringGroup
syn region goRawString start=+`+ end=+`+
hi def link goString String
hi def link goRawString String
" Characters; their contents
syn cluster goCharacterGroup contains=goEscapeOctal,goEscapeC,goEscapeX,goEscapeU,goEscapeBigU
syn region goCharacter start=+'+ skip=+\\\\\|\\'+ end=+'+ contains=@goCharacterGroup
hi def link goCharacter Character
" Regions
syn region goBlock start="{" end="}" transparent fold
syn region goParen start='(' end=')' transparent
" Integers
syn match goDecimalInt "\<\d\+\([Ee]\d\+\)\?\>"
syn match goHexadecimalInt "\<0x\x\+\>"
syn match goOctalInt "\<0\o\+\>"
syn match goOctalError "\<0\o*[89]\d*\>"
hi def link goDecimalInt Integer
hi def link goHexadecimalInt Integer
hi def link goOctalInt Integer
hi def link Integer Number
" Floating point
syn match goFloat "\<\d\+\.\d*\([Ee][-+]\d\+\)\?\>"
syn match goFloat "\<\.\d\+\([Ee][-+]\d\+\)\?\>"
syn match goFloat "\<\d\+[Ee][-+]\d\+\>"
hi def link goFloat Float
" Imaginary literals
syn match goImaginary "\<\d\+i\>"
syn match goImaginary "\<\d\+\.\d*\([Ee][-+]\d\+\)\?i\>"
syn match goImaginary "\<\.\d\+\([Ee][-+]\d\+\)\?i\>"
syn match goImaginary "\<\d\+[Ee][-+]\d\+i\>"
hi def link goImaginary Number
" Spaces after "[]"
if go_highlight_array_whitespace_error != 0
syn match goSpaceError display "\(\[\]\)\@<=\s\+"
endif
" Spacing errors around the 'chan' keyword
if go_highlight_chan_whitespace_error != 0
" receive-only annotation on chan type
syn match goSpaceError display "\(<-\)\@<=\s\+\(chan\>\)\@="
" send-only annotation on chan type
syn match goSpaceError display "\(\<chan\)\@<=\s\+\(<-\)\@="
" value-ignoring receives in a few contexts
syn match goSpaceError display "\(\(^\|[={(,;]\)\s*<-\)\@<=\s\+"
endif
" Extra types commonly seen
if go_highlight_extra_types != 0
syn match goExtraType /\<bytes\.\(Buffer\)\>/
syn match goExtraType /\<io\.\(Reader\|Writer\|ReadWriter\|ReadWriteCloser\)\>/
syn match goExtraType /\<reflect\.\(Kind\|Type\|Value\)\>/
syn match goExtraType /\<unsafe\.Pointer\>/
endif
" Space-tab error
if go_highlight_space_tab_error != 0
syn match goSpaceError display " \+\t"me=e-1
endif
" Trailing white space error
if go_highlight_trailing_whitespace_error != 0
syn match goSpaceError display excludenl "\s\+$"
endif
hi def link goExtraType Type
hi def link goSpaceError Error
" Search backwards for a global declaration to start processing the syntax.
"syn sync match goSync grouphere NONE /^\(const\|var\|type\|func\)\>/
" There's a bug in the implementation of grouphere. For now, use the
" following as a more expensive/less precise workaround.
syn sync minlines=500
let b:current_syntax = 'go'
" vim: sw=2 sts=2 et
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