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" Copyright 2009 The Go Authors. All rights reserved.
" Use of this source code is governed by a BSD-style
" license that can be found in the LICENSE file.
" go.vim: Vim syntax file for Go.
" 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.
" - go_highlight_array_whitespace_error
" Highlights white space after "[]".
" - go_highlight_chan_whitespace_error
" Highlights white space around the communications operator that don't follow
" the standard style.
" - go_highlight_extra_types
" Highlights commonly used library types (os.Error, etc.).
" - go_highlight_space_tab_error
" Highlights instances of tabs following spaces.
" - go_highlight_trailing_whitespace_error
" Highlights trailing white space.
" Quit when a (custom) syntax file was already loaded
if exists("b:current_syntax")
if !exists("go_highlight_array_whitespace_error")
let go_highlight_array_whitespace_error = 1
if !exists("go_highlight_chan_whitespace_error")
let go_highlight_chan_whitespace_error = 1
if !exists("go_highlight_extra_types")
let go_highlight_extra_types = 1
if !exists("go_highlight_space_tab_error")
let go_highlight_space_tab_error = 1
if !exists("go_highlight_trailing_whitespace_error")
let go_highlight_trailing_whitespace_error = 1
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
syn keyword goSignedInts int int8 int16 int32 int64
syn keyword goUnsignedInts byte uint uint8 uint16 uint32 uint64 uintptr
syn keyword goFloats float float32 float64
syn keyword goComplexes complex 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 cap close closed cmplx copy imag len make
syn keyword goBuiltins new panic panicln print println real
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\+"
" 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\+"
" 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 /\<\(os\.Error\)\>/
syn match goExtraType /\<reflect\.\w*\(Type\|Value\)\>/
syn match goExtraType /\<unsafe\.Pointer\>/
" Space-tab error
if go_highlight_space_tab_error != 0
syn match goSpaceError display " \+\t"me=e-1
" Trailing white space error
if go_highlight_trailing_whitespace_error != 0
syn match goSpaceError display excludenl "\s\+$"
hi def link goExtraType Type
hi def link goSpaceError Error
let b:current_syntax = "go"
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