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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.
+" Language: Go
+" Maintainer: Billie Cleek <bhcleek@gmail.com>
+" Latest Revision: 2023-08-21
+" License: BSD-style. See LICENSE file in source repository.
+" Repository: https://github.com/fatih/vim-go
+
+" Quit when a (custom) syntax file was already loaded
+if exists("b:current_syntax")
+ finish
+endif
+
+let s:keepcpo = &cpo
+set cpo&vim
+
+function! s:FoldEnable(...) abort
+ if a:0 > 0
+ return index(s:FoldEnable(), a:1) > -1
+ endif
+ return get(g:, 'go_fold_enable', ['block', 'import', 'varconst', 'package_comment'])
+endfunction
+
+function! s:HighlightArrayWhitespaceError() abort
+ return get(g:, 'go_highlight_array_whitespace_error', 0)
+endfunction
+
+function! s:HighlightChanWhitespaceError() abort
+ return get(g:, 'go_highlight_chan_whitespace_error', 0)
+endfunction
+
+function! s:HighlightExtraTypes() abort
+ return get(g:, 'go_highlight_extra_types', 0)
+endfunction
+
+function! s:HighlightSpaceTabError() abort
+ return get(g:, 'go_highlight_space_tab_error', 0)
+endfunction
+
+function! s:HighlightTrailingWhitespaceError() abort
+ return get(g:, 'go_highlight_trailing_whitespace_error', 0)
+endfunction
+
+function! s:HighlightOperators() abort
+ return get(g:, 'go_highlight_operators', 0)
+endfunction
+
+function! s:HighlightFunctions() abort
+ return get(g:, 'go_highlight_functions', 0)
+endfunction
+
+function! s:HighlightFunctionParameters() abort
+ return get(g:, 'go_highlight_function_parameters', 0)
+endfunction
+
+function! s:HighlightFunctionCalls() abort
+ return get(g:, 'go_highlight_function_calls', 0)
+endfunction
+
+function! s:HighlightFields() abort
+ return get(g:, 'go_highlight_fields', 0)
+endfunction
+
+function! s:HighlightTypes() abort
+ return get(g:, 'go_highlight_types', 0)
+endfunction
+
+function! s:HighlightBuildConstraints() abort
+ return get(g:, 'go_highlight_build_constraints', 0)
+endfunction
+
+function! s:HighlightStringSpellcheck() abort
+ return get(g:, 'go_highlight_string_spellcheck', 1)
+endfunction
+
+function! s:HighlightFormatStrings() abort
+ return get(g:, 'go_highlight_format_strings', 1)
+endfunction
+
+function! s:HighlightGenerateTags() abort
+ return get(g:, 'go_highlight_generate_tags', 0)
+endfunction
+
+function! s:HighlightVariableAssignments() abort
+ return get(g:, 'go_highlight_variable_assignments', 0)
+endfunction
+
+function! s:HighlightVariableDeclarations() abort
+ return get(g:, 'go_highlight_variable_declarations', 0)
+endfunction
+
+syn case match
+
+syn keyword goPackage package
+syn keyword goImport import contained
+syn keyword goVar var contained
+syn keyword goConst const contained
+
+hi def link goPackage Statement
+hi def link goImport Statement
+hi def link goVar Keyword
+hi def link goConst Keyword
+hi def link goDeclaration 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 any comparable
+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
+
+" Predefined functions and values
+syn keyword goBuiltins append cap clear close complex copy delete imag len
+syn keyword goBuiltins make max min new panic print println real recover
+syn keyword goBoolean true false
+syn keyword goPredefinedIdentifiers nil iota
+
+hi def link goBuiltins Identifier
+hi def link goPredefinedIdentifiers Constant
+" Boolean links to Constant by default by vim: goBoolean and goPredefinedIdentifiers
+" will be highlighted the same, but having the separate groups allows users to
+" have separate highlighting for them if they desire.
+hi def link goBoolean Boolean
+
+" Comments; their contents
+syn keyword goTodo contained TODO FIXME XXX BUG
+syn cluster goCommentGroup contains=goTodo
+
+syn region goComment start="//" end="$" contains=goGenerate,@goCommentGroup,@Spell
+if s:FoldEnable('comment')
+ syn region goComment start="/\*" end="\*/" contains=@goCommentGroup,@Spell fold
+ syn match goComment "\v(^\s*//.*\n)+" contains=goGenerate,@goCommentGroup,@Spell fold
+else
+ syn region goComment start="/\*" end="\*/" contains=@goCommentGroup,@Spell
+endif
+
+hi def link goComment Comment
+hi def link goTodo Todo
+
+if s:HighlightGenerateTags()
+ syn match goGenerateVariables contained /\%(\$GOARCH\|\$GOOS\|\$GOFILE\|\$GOLINE\|\$GOPACKAGE\|\$DOLLAR\)\>/
+ syn region goGenerate start="^\s*//go:generate" end="$" contains=goGenerateVariables
+ hi def link goGenerate PreProc
+ hi def link goGenerateVariables Special
+endif
+
+" 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
+if s:HighlightStringSpellcheck()
+ syn region goString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@goStringGroup,@Spell
+ syn region goRawString start=+`+ end=+`+ contains=@Spell
+else
+ syn region goString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@goStringGroup
+ syn region goRawString start=+`+ end=+`+
+endif
+
+syn match goImportString /^\%(\s\+\|import \)\(\h\w* \)\?\zs"[^"]\+"$/ contained containedin=goImport
+
+if s:HighlightFormatStrings()
+ " [n] notation is valid for specifying explicit argument indexes
+ " 1. Match a literal % not preceded by a %.
+ " 2. Match any number of -, #, 0, space, or +
+ " 3. Match * or [n]* or any number or nothing before a .
+ " 4. Match * or [n]* or any number or nothing after a .
+ " 5. Match [n] or nothing before a verb
+ " 6. Match a formatting verb
+ syn match goFormatSpecifier /\
+ \%([^%]\%(%%\)*\)\
+ \@<=%[-#0 +]*\
+ \%(\%(\%(\[\d\+\]\)\=\*\)\|\d\+\)\=\
+ \%(\.\%(\%(\%(\[\d\+\]\)\=\*\)\|\d\+\)\=\)\=\
+ \%(\[\d\+\]\)\=[vTtbcdoqxXUeEfFgGspw]/ contained containedin=goString,goRawString
+ hi def link goFormatSpecifier goSpecialString
+endif
+
+hi def link goImportString String
+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 goParen start='(' end=')' transparent
+if s:FoldEnable('block')
+ syn region goBlock start="{" end="}" transparent fold
+else
+ syn region goBlock start="{" end="}" transparent
+endif
+
+" import
+if s:FoldEnable('import')
+ syn region goImport start='import (' end=')' transparent fold contains=goImport,goImportString,goComment
+else
+ syn region goImport start='import (' end=')' transparent contains=goImport,goImportString,goComment
+endif
+
+" var, const
+if s:FoldEnable('varconst')
+ syn region goVar start='var (' end='^\s*)$' transparent fold
+ \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+ syn region goConst start='const (' end='^\s*)$' transparent fold
+ \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+else
+ syn region goVar start='var (' end='^\s*)$' transparent
+ \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+ syn region goConst start='const (' end='^\s*)$' transparent
+ \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+endif
+
+" Single-line var, const, and import.
+syn match goSingleDecl /\%(import\|var\|const\) [^(]\@=/ contains=goImport,goVar,goConst
+
+" Integers
+syn match goDecimalInt "\<-\=\%(0\|\%(\d\|\d_\d\)\+\)\>"
+syn match goHexadecimalInt "\<-\=0[xX]_\?\%(\x\|\x_\x\)\+\>"
+syn match goOctalInt "\<-\=0[oO]\?_\?\%(\o\|\o_\o\)\+\>"
+syn match goBinaryInt "\<-\=0[bB]_\?\%([01]\|[01]_[01]\)\+\>"
+
+hi def link goDecimalInt Integer
+hi def link goDecimalError Error
+hi def link goHexadecimalInt Integer
+hi def link goHexadecimalError Error
+hi def link goOctalInt Integer
+hi def link goOctalError Error
+hi def link goBinaryInt Integer
+hi def link goBinaryError Error
+hi def link Integer Number
+
+" Floating point
+"float_lit = decimal_float_lit | hex_float_lit .
+"
+"decimal_float_lit = decimal_digits "." [ decimal_digits ] [ decimal_exponent ] |
+" decimal_digits decimal_exponent |
+" "." decimal_digits [ decimal_exponent ] .
+"decimal_exponent = ( "e" | "E" ) [ "+" | "-" ] decimal_digits .
+"
+"hex_float_lit = "0" ( "x" | "X" ) hex_mantissa hex_exponent .
+"hex_mantissa = [ "_" ] hex_digits "." [ hex_digits ] |
+" [ "_" ] hex_digits |
+" "." hex_digits .
+"hex_exponent = ( "p" | "P" ) [ "+" | "-" ] decimal_digits .
+" decimal floats with a decimal point
+syn match goFloat "\<-\=\%(0\|\%(\d\|\d_\d\)\+\)\.\%(\%(\%(\d\|\d_\d\)\+\)\=\%([Ee][-+]\=\%(\d\|\d_\d\)\+\)\=\>\)\="
+syn match goFloat "\s\zs-\=\.\%(\d\|\d_\d\)\+\%(\%([Ee][-+]\=\%(\d\|\d_\d\)\+\)\>\)\="
+" decimal floats without a decimal point
+syn match goFloat "\<-\=\%(0\|\%(\d\|\d_\d\)\+\)[Ee][-+]\=\%(\d\|\d_\d\)\+\>"
+" hexadecimal floats with a decimal point
+syn match goHexadecimalFloat "\<-\=0[xX]\%(_\x\|\x\)\+\.\%(\%(\x\|\x_\x\)\+\)\=\%([Pp][-+]\=\%(\d\|\d_\d\)\+\)\=\>"
+syn match goHexadecimalFloat "\<-\=0[xX]\.\%(\x\|\x_\x\)\+\%([Pp][-+]\=\%(\d\|\d_\d\)\+\)\=\>"
+" hexadecimal floats without a decimal point
+syn match goHexadecimalFloat "\<-\=0[xX]\%(_\x\|\x\)\+[Pp][-+]\=\%(\d\|\d_\d\)\+\>"
+
+hi def link goFloat Float
+hi def link goHexadecimalFloat Float
+
+" Imaginary literals
+syn match goImaginaryDecimal "\<-\=\%(0\|\%(\d\|\d_\d\)\+\)i\>"
+syn match goImaginaryHexadecimal "\<-\=0[xX]_\?\%(\x\|\x_\x\)\+i\>"
+syn match goImaginaryOctal "\<-\=0[oO]\?_\?\%(\o\|\o_\o\)\+i\>"
+syn match goImaginaryBinary "\<-\=0[bB]_\?\%([01]\|[01]_[01]\)\+i\>"
+
+" imaginary decimal floats with a decimal point
+syn match goImaginaryFloat "\<-\=\%(0\|\%(\d\|\d_\d\)\+\)\.\%(\%(\%(\d\|\d_\d\)\+\)\=\%([Ee][-+]\=\%(\d\|\d_\d\)\+\)\=\)\=i\>"
+syn match goImaginaryFloat "\s\zs-\=\.\%(\d\|\d_\d\)\+\%([Ee][-+]\=\%(\d\|\d_\d\)\+\)\=i\>"
+" imaginary decimal floats without a decimal point
+syn match goImaginaryFloat "\<-\=\%(0\|\%(\d\|\d_\d\)\+\)[Ee][-+]\=\%(\d\|\d_\d\)\+i\>"
+" imaginary hexadecimal floats with a decimal point
+syn match goImaginaryHexadecimalFloat "\<-\=0[xX]\%(_\x\|\x\)\+\.\%(\%(\x\|\x_\x\)\+\)\=\%([Pp][-+]\=\%(\d\|\d_\d\)\+\)\=i\>"
+syn match goImaginaryHexadecimalFloat "\<-\=0[xX]\.\%(\x\|\x_\x\)\+\%([Pp][-+]\=\%(\d\|\d_\d\)\+\)\=i\>"
+" imaginary hexadecimal floats without a decimal point
+syn match goImaginaryHexadecimalFloat "\<-\=0[xX]\%(_\x\|\x\)\+[Pp][-+]\=\%(\d\|\d_\d\)\+i\>"
+
+hi def link goImaginaryDecimal Number
+hi def link goImaginaryHexadecimal Number
+hi def link goImaginaryOctal Number
+hi def link goImaginaryBinary Number
+hi def link goImaginaryFloat Float
+hi def link goImaginaryHexadecimalFloat Float
+
+" Spaces after "[]"
+if s:HighlightArrayWhitespaceError()
+ syn match goSpaceError display "\%(\[\]\)\@<=\s\+"
+endif
+
+" Spacing errors around the 'chan' keyword
+if s:HighlightChanWhitespaceError()
+ " receive-only annotation on chan type
+ "
+ " \(\<chan\>\)\@<!<- (only pick arrow when it doesn't come after a chan)
+ " this prevents picking up 'chan<- chan<-' but not '<- chan'
+ syn match goSpaceError display "\%(\%(\<chan\>\)\@<!<-\)\@<=\s\+\%(\<chan\>\)\@="
+
+ " send-only annotation on chan type
+ "
+ " \(<-\)\@<!\<chan\> (only pick chan when it doesn't come after an arrow)
+ " this prevents picking up '<-chan <-chan' but not 'chan <-'
+ 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 s:HighlightExtraTypes()
+ syn match goExtraType /\<bytes\.\%(Buffer\)\>/
+ syn match goExtraType /\<context\.\%(Context\)\>/
+ syn match goExtraType /\<io\.\%(Reader\|ReadSeeker\|ReadWriter\|ReadCloser\|ReadWriteCloser\|Writer\|WriteCloser\|Seeker\)\>/
+ syn match goExtraType /\<reflect\.\%(Kind\|Type\|Value\)\>/
+ syn match goExtraType /\<unsafe\.Pointer\>/
+endif
+
+" Space-tab error
+if s:HighlightSpaceTabError()
+ syn match goSpaceError display " \+\t"me=e-1
+endif
+
+" Trailing white space error
+if s:HighlightTrailingWhitespaceError()
+ syn match goSpaceError display excludenl "\s\+$"
+endif
+
+hi def link goExtraType Type
+hi def link goSpaceError Error
+
+
+
+" included from: https://github.com/athom/more-colorful.vim/blob/master/after/syntax/go.vim
+"
+" Comments; their contents
+syn keyword goTodo contained NOTE
+hi def link goTodo Todo
+
+syn match goVarArgs /\.\.\./
+
+" Operators;
+if s:HighlightOperators()
+ " match single-char operators: - + % < > ! & | ^ * =
+ " and corresponding two-char operators: -= += %= <= >= != &= |= ^= *= ==
+ syn match goOperator /[-+%<>!&|^*=]=\?/
+ " match / and /=
+ syn match goOperator /\/\%(=\|\ze[^/*]\)/
+ " match two-char operators: << >> &^
+ " and corresponding three-char operators: <<= >>= &^=
+ syn match goOperator /\%(<<\|>>\|&^\)=\?/
+ " match remaining two-char operators: := && || <- ++ --
+ syn match goOperator /:=\|||\|<-\|++\|--/
+ " match ~
+ syn match goOperator /\~/
+ " match ...
+
+ hi def link goPointerOperator goOperator
+ hi def link goVarArgs goOperator
+endif
+hi def link goOperator Operator
+
+" -> type constraint opening bracket
+" |-> start non-counting group
+" || -> any word character
+" || | -> at least one, as many as possible
+" || | | -> start non-counting group
+" || | | | -> match ~
+" || | | | | -> at most once
+" || | | | | | -> allow a slice type
+" || | | | | | | -> any word character
+" || | | | | | | | -> start a non-counting group
+" || | | | | | | | | -> that matches word characters and |
+" || | | | | | | | | | -> close the non-counting group
+" || | | | | | | | | | | -> close the non-counting group
+" || | | | | | | | | | | |-> any number of matches
+" || | | | | | | | | | | || -> start a non-counting group
+" || | | | | | | | | | | || | -> a comma and whitespace
+" || | | | | | | | | | | || | | -> at most once
+" || | | | | | | | | | | || | | | -> close the non-counting group
+" || | | | | | | | | | | || | | | | -> at least one of those non-counting groups, as many as possible
+" || | | | | | -------- | | | | || | | | | | -> type constraint closing bracket
+" || | | | | || | | | | | || | | | | | |
+syn match goTypeParams /\[\%(\w\+\s\+\%(\~\?\%(\[]\)\?\w\%(\w\||\)\)*\%(,\s*\)\?\)\+\]/ nextgroup=goSimpleParams,goDeclType contained
+
+" Functions;
+if s:HighlightFunctions() || s:HighlightFunctionParameters()
+ syn match goDeclaration /\<func\>/ nextgroup=goReceiver,goFunction,goSimpleParams skipwhite skipnl
+ syn match goReceiverDecl /(\s*\zs\%(\%(\w\+\s\+\)\?\*\?\w\+\%(\[\%(\%(\[\]\)\?\w\+\%(,\s*\)\?\)\+\]\)\?\)\ze\s*)/ contained contains=goReceiverVar,goReceiverType,goPointerOperator
+ syn match goReceiverVar /\w\+\ze\s\+\%(\w\|\*\)/ nextgroup=goPointerOperator,goReceiverType skipwhite skipnl contained
+ syn match goPointerOperator /\*/ nextgroup=goReceiverType contained skipwhite skipnl
+ syn match goFunction /\w\+/ nextgroup=goSimpleParams,goTypeParams contained skipwhite skipnl
+ syn match goReceiverType /\w\+\%(\[\%(\%(\[\]\)\?\w\+\%(,\s*\)\?\)\+\]\)\?\ze\s*)/ contained
+ if s:HighlightFunctionParameters()
+ syn match goSimpleParams /(\%(\w\|\_s\|[*\.\[\],\{\}<>-]\)*)/ contained contains=goParamName,goType nextgroup=goFunctionReturn skipwhite skipnl
+ syn match goFunctionReturn /(\%(\w\|\_s\|[*\.\[\],\{\}<>-]\)*)/ contained contains=goParamName,goType skipwhite skipnl
+ syn match goParamName /\w\+\%(\s*,\s*\w\+\)*\ze\s\+\%(\w\|\.\|\*\|\[\)/ contained nextgroup=goParamType skipwhite skipnl
+ syn match goParamType /\%([^,)]\|\_s\)\+,\?/ contained nextgroup=goParamName skipwhite skipnl
+ \ contains=goVarArgs,goType,goSignedInts,goUnsignedInts,goFloats,goComplexes,goDeclType,goBlock
+ hi def link goReceiverVar goParamName
+ hi def link goParamName Identifier
+ endif
+ syn match goReceiver /(\s*\%(\w\+\s\+\)\?\*\?\s*\w\+\%(\[\%(\%(\[\]\)\?\w\+\%(,\s*\)\?\)\+\]\)\?\s*)\ze\s*\w/ contained nextgroup=goFunction contains=goReceiverDecl skipwhite skipnl
+else
+ syn keyword goDeclaration func
+endif
+hi def link goFunction Function
+
+" Function calls;
+if s:HighlightFunctionCalls()
+ syn match goFunctionCall /\w\+\ze\%(\[\%(\%(\[]\)\?\w\+\(,\s*\)\?\)\+\]\)\?(/ contains=goBuiltins,goDeclaration
+endif
+hi def link goFunctionCall Type
+
+" Fields;
+if s:HighlightFields()
+ " 1. Match a sequence of word characters coming after a '.'
+ " 2. Require the following but dont match it: ( \@= see :h E59)
+ " - The symbols: / - + * % OR
+ " - The symbols: [] {} <> ) OR
+ " - The symbols: \n \r space OR
+ " - The symbols: , : .
+ " 3. Have the start of highlight (hs) be the start of matched
+ " pattern (s) offsetted one to the right (+1) (see :h E401)
+ syn match goField /\.\w\+\
+ \%(\%([\/\-\+*%]\)\|\
+ \%([\[\]{}<\>\)]\)\|\
+ \%([\!=\^|&]\)\|\
+ \%([\n\r\ ]\)\|\
+ \%([,\:.]\)\)\@=/hs=s+1
+endif
+hi def link goField Identifier
+
+" Structs & Interfaces;
+if s:HighlightTypes()
+ syn match goTypeConstructor /\<\w\+{\@=/
+ syn match goTypeDecl /\<type\>/ nextgroup=goTypeName skipwhite skipnl
+ syn match goTypeName /\w\+/ contained nextgroup=goDeclType,goTypeParams skipwhite skipnl
+ syn match goDeclType /\<\%(interface\|struct\)\>/ skipwhite skipnl
+ hi def link goReceiverType Type
+else
+ syn keyword goDeclType struct interface
+ syn keyword goDeclaration type
+endif
+hi def link goTypeConstructor Type
+hi def link goTypeName Type
+hi def link goTypeDecl Keyword
+hi def link goDeclType Keyword
+
+" Variable Assignments
+if s:HighlightVariableAssignments()
+ syn match goVarAssign /\v[_.[:alnum:]]+(,\s*[_.[:alnum:]]+)*\ze(\s*([-^+|^\/%&]|\*|\<\<|\>\>|\&\^)?\=[^=])/
+ hi def link goVarAssign Special
+endif
+
+" Variable Declarations
+if s:HighlightVariableDeclarations()
+ syn match goVarDefs /\v\w+(,\s*\w+)*\ze(\s*:\=)/
+ hi def link goVarDefs Special
+endif
+
+" Build Constraints
+if s:HighlightBuildConstraints()
+ syn match goBuildKeyword display contained "+build\|go:build"
+ " Highlight the known values of GOOS, GOARCH, and other +build options.
+ syn keyword goBuildDirectives contained
+ \ android darwin dragonfly freebsd linux nacl netbsd openbsd plan9
+ \ solaris windows 386 amd64 amd64p32 arm armbe arm64 arm64be ppc64
+ \ ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc
+ \ s390 s390x sparc sparc64 cgo ignore race
+
+ " Other words in the build directive are build tags not listed above, so
+ " avoid highlighting them as comments by using a matchgroup just for the
+ " start of the comment.
+ " The rs=s+2 option lets the \s*+build portion be part of the inner region
+ " instead of the matchgroup so it will be highlighted as a goBuildKeyword.
+ syn region goBuildComment matchgroup=goBuildCommentStart
+ \ start="//\(\s*+build\s\|go:build\)"rs=s+2 end="$"
+ \ contains=goBuildKeyword,goBuildDirectives
+ hi def link goBuildCommentStart Comment
+ hi def link goBuildDirectives Type
+ hi def link goBuildKeyword PreProc
+endif
+
+if s:HighlightBuildConstraints() || s:FoldEnable('package_comment')
+ " One or more line comments that are followed immediately by a "package"
+ " declaration are treated like package documentation, so these must be
+ " matched as comments to avoid looking like working build constraints.
+ " The he, me, and re options let the "package" itself be highlighted by
+ " the usual rules.
+ exe 'syn region goPackageComment start=/\v(\/\/.*\n)+\s*package/'
+ \ . ' end=/\v\n\s*package/he=e-7,me=e-7,re=e-7'
+ \ . ' contains=@goCommentGroup,@Spell'
+ \ . (s:FoldEnable('package_comment') ? ' fold' : '')
+ exe 'syn region goPackageComment start=/\v^\s*\/\*.*\n(.*\n)*\s*\*\/\npackage/'
+ \ . ' end=/\v\*\/\n\s*package/he=e-7,me=e-7,re=e-7'
+ \ . ' contains=@goCommentGroup,@Spell'
+ \ . (s:FoldEnable('package_comment') ? ' fold' : '')
+ hi def link goPackageComment Comment
+endif
+
+" :GoCoverage commands
+hi def link goCoverageNormalText Comment
+
+" 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"
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+" vim: sw=2 sts=2 et