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vim-polyglot/syntax/crystal.vim

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Add crystal syntax, closes #118
2016-05-02 04:49:45 -04:00
if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'crystal') == -1
" Language: Crystal
" Based on Ruby syntax highlight
" which is made by Mirko Nasato and Doug Kearns
" ---------------------------------------------
if exists('b:current_syntax')
finish
endif
syn cluster crystalNotTop contains=@crystalExtendedStringSpecial,@crystalRegexpSpecial,@crystalDeclaration,crystalConditional,crystalExceptional,crystalMethodExceptional,crystalTodo,crystalLinkAttr
if exists('crystal_space_errors')
if !exists('crystal_no_trail_space_error')
syn match crystalSpaceError display excludenl "\s\+$"
endif
if !exists('crystal_no_tab_space_error')
syn match crystalSpaceError display " \+\t"me=e-1
endif
endif
" Operators
if exists('crystal_operators')
syn match crystalOperator "[~!^&|*/%+-]\|\%(class\s*\)\@<!<<\|<=>\|<=\|\%(<\|\<class\s\+\u\w*\s*\)\@<!<[^<]\@=\|===\|==\|=\~\|>>\|>=\|=\@<!>\|\*\*\|\.\.\.\|\.\.\|::"
syn match crystalOperator "->\|-=\|/=\|\*\*=\|\*=\|&&=\|&=\|&&\|||=\||=\|||\|%=\|+=\|!\~\|!="
syn region crystalBracketOperator matchgroup=crystalOperator start="\%(\w[?!]\=\|[]})]\)\@<=\[\s*" end="\s*]" contains=ALLBUT,@crystalNotTop
endif
" Expression Substitution and Backslash Notation
syn match crystalStringEscape "\\\\\|\\[abefnrstv]\|\\\o\{1,3}\|\\x\x\{1,2}" contained display
syn match crystalStringEscape "\%(\\M-\\C-\|\\C-\\M-\|\\M-\\c\|\\c\\M-\|\\c\|\\C-\|\\M-\)\%(\\\o\{1,3}\|\\x\x\{1,2}\|\\\=\S\)" contained display
syn region crystalInterpolation matchgroup=crystalInterpolationDelimiter start="#{" end="}" contained contains=ALLBUT,@crystalNotTop
syn match crystalInterpolation "#\%(\$\|@@\=\)\w\+" display contained contains=crystalInterpolationDelimiter,crystalInstanceVariable,crystalClassVariable,crystalGlobalVariable,crystalPredefinedVariable
syn match crystalInterpolationDelimiter "#\ze\%(\$\|@@\=\)\w\+" display contained
syn match crystalInterpolation "#\$\%(-\w\|\W\)" display contained contains=crystalInterpolationDelimiter,crystalPredefinedVariable,crystalInvalidVariable
syn match crystalInterpolationDelimiter "#\ze\$\%(-\w\|\W\)" display contained
syn region crystalNoInterpolation start="\\#{" end="}" contained
syn match crystalNoInterpolation "\\#{" display contained
syn match crystalNoInterpolation "\\#\%(\$\|@@\=\)\w\+" display contained
syn match crystalNoInterpolation "\\#\$\W" display contained
syn match crystalDelimEscape "\\[(<{\[)>}\]]" transparent display contained contains=NONE
syn region crystalNestedParentheses start="(" skip="\\\\\|\\)" matchgroup=crystalString end=")" transparent contained
syn region crystalNestedCurlyBraces start="{" skip="\\\\\|\\}" matchgroup=crystalString end="}" transparent contained
syn region crystalNestedAngleBrackets start="<" skip="\\\\\|\\>" matchgroup=crystalString end=">" transparent contained
syn region crystalNestedSquareBrackets start="\[" skip="\\\\\|\\\]" matchgroup=crystalString end="\]" transparent contained
" These are mostly Oniguruma ready
syn region crystalRegexpComment matchgroup=crystalRegexpSpecial start="(?#" skip="\\)" end=")" contained
syn region crystalRegexpParens matchgroup=crystalRegexpSpecial start="(\(?:\|?<\=[=!]\|?>\|?<[a-z_]\w*>\|?[imx]*-[imx]*:\=\|\%(?#\)\@!\)" skip="\\)" end=")" contained transparent contains=@crystalRegexpSpecial
syn region crystalRegexpBrackets matchgroup=crystalRegexpCharClass start="\[\^\=" skip="\\\]" end="\]" contained transparent contains=crystalStringEscape,crystalRegexpEscape,crystalRegexpCharClass oneline
syn match crystalRegexpCharClass "\\[DdHhSsWw]" contained display
syn match crystalRegexpCharClass "\[:\^\=\%(alnum\|alpha\|ascii\|blank\|cntrl\|digit\|graph\|lower\|print\|punct\|space\|upper\|xdigit\):\]" contained
syn match crystalRegexpEscape "\\[].*?+^$|\\/(){}[]" contained
syn match crystalRegexpQuantifier "[*?+][?+]\=" contained display
syn match crystalRegexpQuantifier "{\d\+\%(,\d*\)\=}?\=" contained display
syn match crystalRegexpAnchor "[$^]\|\\[ABbGZz]" contained display
syn match crystalRegexpDot "\." contained display
syn match crystalRegexpSpecial "|" contained display
syn match crystalRegexpSpecial "\\[1-9]\d\=\d\@!" contained display
syn match crystalRegexpSpecial "\\k<\%([a-z_]\w*\|-\=\d\+\)\%([+-]\d\+\)\=>" contained display
syn match crystalRegexpSpecial "\\k'\%([a-z_]\w*\|-\=\d\+\)\%([+-]\d\+\)\='" contained display
syn match crystalRegexpSpecial "\\g<\%([a-z_]\w*\|-\=\d\+\)>" contained display
syn match crystalRegexpSpecial "\\g'\%([a-z_]\w*\|-\=\d\+\)'" contained display
syn cluster crystalStringSpecial contains=crystalInterpolation,crystalNoInterpolation,crystalStringEscape
syn cluster crystalExtendedStringSpecial contains=@crystalStringSpecial,crystalNestedParentheses,crystalNestedCurlyBraces,crystalNestedAngleBrackets,crystalNestedSquareBrackets
syn cluster crystalRegexpSpecial contains=crystalInterpolation,crystalNoInterpolation,crystalStringEscape,crystalRegexpSpecial,crystalRegexpEscape,crystalRegexpBrackets,crystalRegexpCharClass,crystalRegexpDot,crystalRegexpQuantifier,crystalRegexpAnchor,crystalRegexpParens,crystalRegexpComment
" Numbers and ASCII Codes
syn match crystalASCIICode "\%(\w\|[]})\"'/]\)\@<!\%(?\%(\\M-\\C-\|\\C-\\M-\|\\M-\\c\|\\c\\M-\|\\c\|\\C-\|\\M-\)\=\%(\\\o\{1,3}\|\\x\x\{1,2}\|\\\=\S\)\)"
syn match crystalInteger "\%(\%(\w\|[]})\"']\s*\)\@<!-\)\=\<0[xX]\x\+\%(_\x\+\)*\%(_*[ufi]\%(32\|64\)\)\=\>" display
syn match crystalInteger "\%(\%(\w\|[]})\"']\s*\)\@<!-\)\=\<\%(0[dD]\)\=\%(0\|[1-9]\d*\%(_\d\+\)*\)\%(_\x\+\)*\%(_*[ufi]\%(32\|64\)\)\=\>" display
syn match crystalInteger "\%(\%(\w\|[]})\"']\s*\)\@<!-\)\=\<0[oO]\=\o\+\%(_\o\+\)*\%(_\x\+\)*\%(_*[ufi]\%(32\|64\)\)\=\>" display
syn match crystalInteger "\%(\%(\w\|[]})\"']\s*\)\@<!-\)\=\<0[bB][01]\+\%(_[01]\+\)*\%(_\x\+\)*\%(_*[ufi]\%(32\|64\)\)\=\>" display
syn match crystalFloat "\%(\%(\w\|[]})\"']\s*\)\@<!-\)\=\<\%(0\|[1-9]\d*\%(_\d\+\)*\)\.\d\+\%(_\d\+\)*\%(_*f\%(32\|64\)\)\=\>" display
syn match crystalFloat "\%(\%(\w\|[]})\"']\s*\)\@<!-\)\=\<\%(0\|[1-9]\d*\%(_\d\+\)*\)\%(\.\d\+\%(_\d\+\)*\)\=\%([eE][-+]\=\d\+\%(_\d\+\)*\)\%(_*f\%(32\|64\)\)\=\>" display
" Identifiers
syn match crystalLocalVariableOrMethod "\<[_[:lower:]][_[:alnum:]]*[?!=]\=" contains=NONE display transparent
syn match crystalBlockArgument "&[_[:lower:]][_[:alnum:]]" contains=NONE display transparent
syn match crystalConstant "\%(\%([.@$]\@<!\.\)\@<!\<\|::\)\_s*\zs\u\w*\%(\>\|::\)\@="
syn match crystalClassVariable "@@\%(\h\|%\|[^\x00-\x7F]\)\%(\w\|%\|[^\x00-\x7F]\)*" display
syn match crystalInstanceVariable "@\%(\h\|%\|[^\x00-\x7F]\)\%(\w\|%\|[^\x00-\x7F]\)*" display
syn match crystalGlobalVariable "$\%(\%(\h\|%\|[^\x00-\x7F]\)\%(\w\|%\|[^\x00-\x7F]\)*\|-.\)"
syn match crystalFreshVariable "\%(\h\|[^\x00-\x7F]\)\@<!%\%(\h\|[^\x00-\x7F]\)\%(\w\|%\|[^\x00-\x7F]\)*" display
syn match crystalSymbol "[]})\"':]\@<!:\%(\^\|\~\|<<\|<=>\|<=\|<\|===\|[=!]=\|[=!]\~\|!\|>>\|>=\|>\||\|-@\|-\|/\|\[][=?]\|\[]\|\*\*\|\*\|&\|%\|+@\|+\|`\)"
syn match crystalSymbol "[]})\"':]\@<!:\$\%(-.\|[`~<=>_,;:!?/.'"@$*\&+0]\)"
syn match crystalSymbol "[]})\"':]\@<!:\%(\$\|@@\=\)\=\%(\h\|[^\x00-\x7F]\)\%(\w\|[^\x00-\x7F]\)*"
syn match crystalSymbol "[]})\"':]\@<!:\%(\h\|%\|[^\x00-\x7F]\)\%(\w\|%\|[^\x00-\x7F]\)*\%([?!=]>\@!\)\="
syn match crystalSymbol "\%([{(,]\_s*\)\@<=\l\w*[!?]\=::\@!"he=e-1
syn match crystalSymbol "[]})\"':]\@<!\%(\h\|[^\x00-\x7F]\)\%(\w\|[^\x00-\x7F]\)*[!?]\=:\s\@="he=e-1
syn match crystalSymbol "\%([{(,]\_s*\)\@<=[[:space:],{]\l\w*[!?]\=::\@!"hs=s+1,he=e-1
syn match crystalSymbol "[[:space:],{]\%(\h\|[^\x00-\x7F]\)\%(\w\|[^\x00-\x7F]\)*[!?]\=:\s\@="hs=s+1,he=e-1
syn region crystalSymbol start="[]})\"':]\@<!:\"" end="\"" skip="\\\\\|\\\"" contains=@crystalStringSpecial fold
syn match crystalBlockParameter "\%(\h\|%\|[^\x00-\x7F]\)\%(\w\|%\|[^\x00-\x7F]\)*" contained
syn region crystalBlockParameterList start="\%(\%(\<do\>\|{\)\s*\)\@<=|" end="|" oneline display contains=crystalBlockParameter
syn match crystalInvalidVariable "$[^ %A-Za-z_-]"
syn match crystalPredefinedVariable #$[!$&"'*+,./0:;<=>?@\`~]#
syn match crystalPredefinedVariable "$\d\+" display
syn match crystalPredefinedVariable "$_\>" display
syn match crystalPredefinedVariable "$-[0FIKadilpvw]\>" display
syn match crystalPredefinedVariable "$\%(deferr\|defout\|stderr\|stdin\|stdout\)\>" display
syn match crystalPredefinedVariable "$\%(DEBUG\|FILENAME\|KCODE\|LOADED_FEATURES\|LOAD_PATH\|PROGRAM_NAME\|SAFE\|VERBOSE\)\>" display
syn match crystalPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(MatchingData\|ARGF\|ARGV\|ENV\)\>\%(\s*(\)\@!"
syn match crystalPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(DATA\|FALSE\|NIL\)\>\%(\s*(\)\@!"
syn match crystalPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(STDERR\|STDIN\|STDOUT\|TOPLEVEL_BINDING\|TRUE\)\>\%(\s*(\)\@!"
syn match crystalPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(crystal_\%(VERSION\|RELEASE_DATE\|PLATFORM\|PATCHLEVEL\|REVISION\|DESCRIPTION\|COPYRIGHT\|ENGINE\)\)\>\%(\s*(\)\@!"
" Normal Regular Expression
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="\%(\%(^\|\<\%(and\|or\|while\|until\|unless\|if\|elsif\|ifdef\|when\|not\|then\|else\)\|[;\~=!|&(,[<>?:*+-]\)\s*\)\@<=/" end="/[iomxneus]*" skip="\\\\\|\\/" contains=@crystalRegexpSpecial fold
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="\%(\h\k*\s\+\)\@<=/[ \t=]\@!" end="/[iomxneus]*" skip="\\\\\|\\/" contains=@crystalRegexpSpecial fold
" Generalized Regular Expression
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="%r\z([~`!@#$%^&*_\-+=|\:;"',.? /]\)" end="\z1[iomxneus]*" skip="\\\\\|\\\z1" contains=@crystalRegexpSpecial fold
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="%r{" end="}[iomxneus]*" skip="\\\\\|\\}" contains=@crystalRegexpSpecial fold
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="%r<" end=">[iomxneus]*" skip="\\\\\|\\>" contains=@crystalRegexpSpecial,crystalNestedAngleBrackets,crystalDelimEscape fold
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="%r\[" end="\][iomxneus]*" skip="\\\\\|\\\]" contains=@crystalRegexpSpecial fold
syn region crystalRegexp matchgroup=crystalRegexpDelimiter start="%r(" end=")[iomxneus]*" skip="\\\\\|\\)" contains=@crystalRegexpSpecial fold
" Normal String and Shell Command Output
syn region crystalString matchgroup=crystalStringDelimiter start="\"" end="\"" skip="\\\\\|\\\"" contains=@crystalStringSpecial,@Spell fold
syn region crystalString matchgroup=crystalStringDelimiter start="`" end="`" skip="\\\\\|\\`" contains=@crystalStringSpecial fold
" Character
syn match crystalCharLiteral "'\%([^\\]\|\\[abefnrstv'\\]\|\\\o\{1,3}\|\\x\x\{1,2}\|\\u\x\{4}\)'" contained display
" Generalized Single Quoted String, Symbol and Array of Strings
syn region crystalString matchgroup=crystalStringDelimiter start="%[qwi]\z([~`!@#$%^&*_\-+=|\:;"',.?/]\)" end="\z1" skip="\\\\\|\\\z1" fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[qwi]{" end="}" skip="\\\\\|\\}" fold contains=crystalNestedCurlyBraces,crystalDelimEscape
syn region crystalString matchgroup=crystalStringDelimiter start="%[qwi]<" end=">" skip="\\\\\|\\>" fold contains=crystalNestedAngleBrackets,crystalDelimEscape
syn region crystalString matchgroup=crystalStringDelimiter start="%[qwi]\[" end="\]" skip="\\\\\|\\\]" fold contains=crystalNestedSquareBrackets,crystalDelimEscape
syn region crystalString matchgroup=crystalStringDelimiter start="%[qwi](" end=")" skip="\\\\\|\\)" fold contains=crystalNestedParentheses,crystalDelimEscape
syn region crystalString matchgroup=crystalStringDelimiter start="%q " end=" " skip="\\\\\|\\)" fold
syn region crystalSymbol matchgroup=crystalSymbolDelimiter start="%s\z([~`!@#$%^&*_\-+=|\:;"',.? /]\)" end="\z1" skip="\\\\\|\\\z1" fold
syn region crystalSymbol matchgroup=crystalSymbolDelimiter start="%s{" end="}" skip="\\\\\|\\}" fold contains=crystalNestedCurlyBraces,crystalDelimEscape
syn region crystalSymbol matchgroup=crystalSymbolDelimiter start="%s<" end=">" skip="\\\\\|\\>" fold contains=crystalNestedAngleBrackets,crystalDelimEscape
syn region crystalSymbol matchgroup=crystalSymbolDelimiter start="%s\[" end="\]" skip="\\\\\|\\\]" fold contains=crystalNestedSquareBrackets,crystalDelimEscape
syn region crystalSymbol matchgroup=crystalSymbolDelimiter start="%s(" end=")" skip="\\\\\|\\)" fold contains=crystalNestedParentheses,crystalDelimEscape
" Generalized Double Quoted String and Array of Strings and Shell Command Output
" Note: %= is not matched here as the beginning of a double quoted string
syn region crystalString matchgroup=crystalStringDelimiter start="%\z([~`!@#$%^&*_\-+|\:;"',.?/]\)" end="\z1" skip="\\\\\|\\\z1" contains=@crystalStringSpecial fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[QWIx]\z([~`!@#$%^&*_\-+=|\:;"',.?/]\)" end="\z1" skip="\\\\\|\\\z1" contains=@crystalStringSpecial fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[QWIx]\={" end="}" skip="\\\\\|\\}" contains=@crystalStringSpecial,crystalNestedCurlyBraces,crystalDelimEscape fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[QWIx]\=<" end=">" skip="\\\\\|\\>" contains=@crystalStringSpecial,crystalNestedAngleBrackets,crystalDelimEscape fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[QWIx]\=\[" end="\]" skip="\\\\\|\\\]" contains=@crystalStringSpecial,crystalNestedSquareBrackets,crystalDelimEscape fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[QWIx]\=(" end=")" skip="\\\\\|\\)" contains=@crystalStringSpecial,crystalNestedParentheses,crystalDelimEscape fold
syn region crystalString matchgroup=crystalStringDelimiter start="%[Qx] " end=" " skip="\\\\\|\\)" contains=@crystalStringSpecial fold
" Here Document
syn region crystalHeredocStart matchgroup=crystalStringDelimiter start=+\%(\%(class\s*\|\%([]})"'.]\|::\)\)\_s*\|\w\)\@<!<<-\=\zs\%(\%(\h\|[^\x00-\x7F]\)\%(\w\|[^\x00-\x7F]\)*\)+ end=+$+ oneline contains=ALLBUT,@crystalNotTop
syn region crystalHeredocStart matchgroup=crystalStringDelimiter start=+\%(\%(class\s*\|\%([]})"'.]\|::\)\)\_s*\|\w\)\@<!<<-\=\zs"\%([^"]*\)"+ end=+$+ oneline contains=ALLBUT,@crystalNotTop
syn region crystalHeredocStart matchgroup=crystalStringDelimiter start=+\%(\%(class\s*\|\%([]})"'.]\|::\)\)\_s*\|\w\)\@<!<<-\=\zs'\%([^']*\)'+ end=+$+ oneline contains=ALLBUT,@crystalNotTop
syn region crystalHeredocStart matchgroup=crystalStringDelimiter start=+\%(\%(class\s*\|\%([]})"'.]\|::\)\)\_s*\|\w\)\@<!<<-\=\zs`\%([^`]*\)`+ end=+$+ oneline contains=ALLBUT,@crystalNotTop
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]})"'.]\)\s\|\w\)\@<!<<\z(\%(\h\|[^\x00-\x7F]\)\%(\w\|[^\x00-\x7F]\)*\)\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+2 matchgroup=crystalStringDelimiter end=+^\z1$+ contains=crystalHeredocStart,crystalHeredoc,@crystalStringSpecial fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]})"'.]\)\s\|\w\)\@<!<<"\z([^"]*\)"\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+2 matchgroup=crystalStringDelimiter end=+^\z1$+ contains=crystalHeredocStart,crystalHeredoc,@crystalStringSpecial fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]})"'.]\)\s\|\w\)\@<!<<'\z([^']*\)'\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+2 matchgroup=crystalStringDelimiter end=+^\z1$+ contains=crystalHeredocStart,crystalHeredoc fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]})"'.]\)\s\|\w\)\@<!<<`\z([^`]*\)`\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+2 matchgroup=crystalStringDelimiter end=+^\z1$+ contains=crystalHeredocStart,crystalHeredoc,@crystalStringSpecial fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]}).]\)\s\|\w\)\@<!<<-\z(\%(\h\|[^\x00-\x7F]\)\%(\w\|[^\x00-\x7F]\)*\)\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+3 matchgroup=crystalStringDelimiter end=+^\s*\zs\z1$+ contains=crystalHeredocStart,@crystalStringSpecial fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]}).]\)\s\|\w\)\@<!<<-"\z([^"]*\)"\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+3 matchgroup=crystalStringDelimiter end=+^\s*\zs\z1$+ contains=crystalHeredocStart,@crystalStringSpecial fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]}).]\)\s\|\w\)\@<!<<-'\z([^']*\)'\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+3 matchgroup=crystalStringDelimiter end=+^\s*\zs\z1$+ contains=crystalHeredocStart fold keepend
syn region crystalString start=+\%(\%(class\|::\)\_s*\|\%([]}).]\)\s\|\w\)\@<!<<-`\z([^`]*\)`\ze\%(.*<<-\=['`"]\=\h\)\@!+hs=s+3 matchgroup=crystalStringDelimiter end=+^\s*\zs\z1$+ contains=crystalHeredocStart,@crystalStringSpecial fold keepend
if exists('main_syntax') && g:main_syntax ==# 'ecrystal'
let b:crystal_no_expensive = 1
end
syn match crystalAliasDeclaration "[^[:space:];#.()]\+" contained contains=crystalSymbol,crystalGlobalVariable,crystalPredefinedVariable nextgroup=crystalAliasDeclaration2 skipwhite
syn match crystalAliasDeclaration2 "[^[:space:];#.()]\+" contained contains=crystalSymbol,crystalGlobalVariable,crystalPredefinedVariable
syn match crystalMethodDeclaration "[^[:space:];#(]\+" contained contains=crystalConstant,crystalBoolean,crystalPseudoVariable,crystalInstanceVariable,crystalClassVariable,crystalGlobalVariable
syn match crystalFunctionDeclaration "[^[:space:];#=]\+" contained contains=crystalConstant
syn match crystalTypeDeclaration "[^[:space:];#=]\+" contained contains=crystalConstant
syn match crystalClassDeclaration "[^[:space:];#<]\+" contained contains=crystalConstant,crystalOperator
syn match crystalModuleDeclaration "[^[:space:];#<]\+" contained contains=crystalConstant,crystalOperator
syn match crystalStructDeclaration "[^[:space:];#<]\+" contained contains=crystalConstant,crystalOperator
syn match crystalLibDeclaration "[^[:space:];#<]\+" contained contains=crystalConstant,crystalOperator
syn match crystalMacroDeclaration "[^[:space:];#<\"]\+" contained contains=crystalConstant,crystalOperator
syn match crystalEnumDeclaration "[^[:space:];#<\"]\+" contained contains=crystalConstant
syn match crystalFunction "\<[_[:alpha:]][_[:alnum:]]*[?!=]\=[[:alnum:]_.:?!=]\@!" contained containedin=crystalMethodDeclaration,crystalFunctionDeclaration
syn match crystalFunction "\%(\s\|^\)\@<=[_[:alpha:]][_[:alnum:]]*[?!=]\=\%(\s\|$\)\@=" contained containedin=crystalAliasDeclaration,crystalAliasDeclaration2
syn match crystalFunction "\%([[:space:].]\|^\)\@<=\%(\[\][=?]\=\|\*\*\|[+-]@\=\|[*/%|&^~]\|<<\|>>\|[<>]=\=\|<=>\|===\|[=!]=\|[=!]\~\|!\|`\)\%([[:space:];#(]\|$\)\@=" contained containedin=crystalAliasDeclaration,crystalAliasDeclaration2,crystalMethodDeclaration,crystalFunctionDeclaration
syn cluster crystalDeclaration contains=crystalAliasDeclaration,crystalAliasDeclaration2,crystalMethodDeclaration,crystalFunctionDeclaration,crystalModuleDeclaration,crystalClassDeclaration,crystalStructDeclaration,crystalLibDeclaration,crystalMacroDeclaration,crystalFunction,crystalBlockParameter,crystalTypeDeclaration,crystalEnumDeclaration
" Keywords
" Note: the following keywords have already been defined:
" begin case class def do end for if module unless until while
syn match crystalControl "\<\%(break\|in\|next\|rescue\|return\)\>[?!]\@!"
syn match crystalOperator "\<defined?" display
syn match crystalKeyword "\<\%(super\|previous_def\|yield\|as\|of\|with\)\>[?!]\@!"
syn match crystalBoolean "\<\%(true\|false\)\>[?!]\@!"
syn match crystalPseudoVariable "\<\%(nil\|self\|__DIR__\|__FILE__\|__LINE__\)\>[?!]\@!" " TODO: reorganise
" Expensive Mode - match 'end' with the appropriate opening keyword for syntax
" based folding and special highlighting of module/class/method definitions
if !exists('b:crystal_no_expensive') && !exists('crystal_no_expensive')
syn match crystalDefine "\<alias\>" nextgroup=crystalAliasDeclaration skipwhite skipnl
syn match crystalDefine "\<def\>" nextgroup=crystalMethodDeclaration skipwhite skipnl
syn match crystalDefine "\<fun\>" nextgroup=crystalFunctionDeclaration skipwhite skipnl
syn match crystalDefine "\<undef\>" nextgroup=crystalFunction skipwhite skipnl
syn match crystalDefine "\<\%(type\|alias\)\>\%(\s*\h\w*\s*=\)\@=" nextgroup=crystalTypeDeclaration skipwhite skipnl
syn match crystalClass "\<class\>" nextgroup=crystalClassDeclaration skipwhite skipnl
syn match crystalModule "\<module\>" nextgroup=crystalModuleDeclaration skipwhite skipnl
syn match crystalStruct "\<struct\>" nextgroup=crystalStructDeclaration skipwhite skipnl
syn match crystalLib "\<lib\>" nextgroup=crystalLibDeclaration skipwhite skipnl
syn match crystalMacro "\<macro\>" nextgroup=crystalMacroDeclaration skipwhite skipnl
syn match crystalEnum "\<enum\>" nextgroup=crystalEnumDeclaration skipwhite skipnl
syn region crystalMethodBlock start="\<\%(def\|macro\)\>" matchgroup=crystalDefine end="\%(\<\%(def\|macro\)\_s\+\)\@<!\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalBlock start="\<class\>" matchgroup=crystalClass end="\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalBlock start="\<module\>" matchgroup=crystalModule end="\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalBlock start="\<struct\>" matchgroup=crystalStruct end="\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalBlock start="\<lib\>" matchgroup=crystalLib end="\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalBlock start="\<enum\>" matchgroup=crystalEnum end="\<end\>" contains=ALLBUT,@crystalNotTop fold
" modifiers
syn match crystalConditionalModifier "\<\%(if\|unless\|ifdef\)\>" display
syn match crystalRepeatModifier "\<\%(while\|until\)\>" display
syn region crystalDoBlock matchgroup=crystalControl start="\<do\>" end="\<end\>" contains=ALLBUT,@crystalNotTop fold
" curly bracket block or hash literal
syn region crystalCurlyBlock matchgroup=crystalCurlyBlockDelimiter start="{" end="}" contains=ALLBUT,@crystalNotTop fold
syn region crystalArrayLiteral matchgroup=crystalArrayDelimiter start="\%(\w\|[\]})]\)\@<!\[" end="]" contains=ALLBUT,@crystalNotTop fold
" statements without 'do'
syn region crystalBlockExpression matchgroup=crystalControl start="\<begin\>" end="\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalCaseExpression matchgroup=crystalConditional start="\<case\>" end="\<end\>" contains=ALLBUT,@crystalNotTop fold
syn region crystalConditionalExpression matchgroup=crystalConditional start="\%(\%(^\|\.\.\.\=\|[{:,;([<>~\*/%&^|+=-]\|\%(\<[_[:lower:]][_[:alnum:]]*\)\@<![?!]\)\s*\)\@<=\%(if\|ifdef\|unless\)\>" end="\%(\%(\%(\.\@<!\.\)\|::\)\s*\)\@<!\<end\>" contains=ALLBUT,@crystalNotTop fold
syn match crystalConditional "\<\%(then\|else\|when\)\>[?!]\@!" contained containedin=crystalCaseExpression
syn match crystalConditional "\<\%(then\|else\|elsif\)\>[?!]\@!" contained containedin=crystalConditionalExpression
syn match crystalExceptional "\<\%(\%(\%(;\|^\)\s*\)\@<=rescue\|else\|ensure\)\>[?!]\@!" contained containedin=crystalBlockExpression
syn match crystalMethodExceptional "\<\%(\%(\%(;\|^\)\s*\)\@<=rescue\|else\|ensure\)\>[?!]\@!" contained containedin=crystalMethodBlock
" statements with optional 'do'
syn region crystalOptionalDoLine matchgroup=crystalRepeat start="\<for\>[?!]\@!" start="\%(\%(^\|\.\.\.\=\|[{:,;([<>~\*/%&^|+-]\|\%(\<[_[:lower:]][_[:alnum:]]*\)\@<![!=?]\)\s*\)\@<=\<\%(until\|while\)\>" matchgroup=crystalOptionalDo end="\%(\<do\>\)" end="\ze\%(;\|$\)" oneline contains=ALLBUT,@crystalNotTop
syn region crystalRepeatExpression start="\<for\>[?!]\@!" start="\%(\%(^\|\.\.\.\=\|[{:,;([<>~\*/%&^|+-]\|\%(\<[_[:lower:]][_[:alnum:]]*\)\@<![!=?]\)\s*\)\@<=\<\%(until\|while\)\>" matchgroup=crystalRepeat end="\<end\>" contains=ALLBUT,@crystalNotTop nextgroup=crystalOptionalDoLine fold
if !exists('crystal_minlines')
let crystal_minlines = 500
endif
exec 'syn sync minlines=' . crystal_minlines
else
syn match crystalControl "\<def\>[?!]\@!" nextgroup=crystalMethodDeclaration skipwhite skipnl
syn match crystalControl "\<fun\>[?!]\@!" nextgroup=crystalFunctionDeclaration skipwhite skipnl
syn match crystalControl "\<class\>[?!]\@!" nextgroup=crystalClassDeclaration skipwhite skipnl
syn match crystalControl "\<module\>[?!]\@!" nextgroup=crystalModuleDeclaration skipwhite skipnl
syn match crystalControl "\<struct\>[?!]\@!" nextgroup=crystalStructDeclaration skipwhite skipnl
syn match crystalControl "\<lib\>[?!]\@!" nextgroup=crystalLibDeclaration skipwhite skipnl
syn match crystalControl "\<macro\>[?!]\@!" nextgroup=crystalMacroDeclaration skipwhite skipnl
syn match crystalControl "\<enum\>[?!]\@!" nextgroup=crystalEnumDeclaration skipwhite skipnl
syn match crystalControl "\<\%(case\|begin\|do\|for\|if\|ifdef\|unless\|while\|until\|else\|elsif\|ensure\|then\|when\|end\)\>[?!]\@!"
syn match crystalKeyword "\<\%(alias\|undef\)\>[?!]\@!"
endif
" Link attribute
syn region crystalLinkAttrRegion start="@\[" nextgroup=crystalLinkAttrRegionInner end="]" contains=crystalLinkAttr,crystalLinkAttrRegionInner transparent display oneline
syn region crystalLinkAttrRegionInner start="\%(@\[\)\@<=" end="]\@=" contained contains=ALLBUT,@crystalNotTop transparent display oneline
syn match crystalLinkAttr "@\[" contained containedin=crystalLinkAttrRegion display
syn match crystalLinkAttr "]" contained containedin=crystalLinkAttrRegion display
" Special Methods
if !exists('crystal_no_special_methods')
syn keyword crystalAccess protected private
" attr is a common variable name
syn keyword crystalAttribute getter setter property abstract
syn match crystalControl "\<\%(abort\|at_exit\|exit\|fork\|loop\)\>[?!]\@!" display
syn keyword crystalException raise
" false positive with 'include?'
syn match crystalInclude "\<include\>[?!]\@!" display
syn keyword crystalInclude extend require
syn keyword crystalKeyword caller typeof pointerof sizeof instance_sizeof
syn match crystalRecord "\<record\>[?!]\@!" display
endif
" Macro
syn region crystalMacroRegion start="{%" end="%}" contains=ALLBUT,@crystalNotTop transparent display oneline
syn region crystalMacroRegion start="{{" end="}}" contains=ALLBUT,@crystalNotTop transparent display oneline
syn match crystalMacro "\%({%\|%}\|{{\|}}\)" nextgroup=crystalMacroRegion skipwhite display
" Comments and Documentation
syn match crystalSharpBang "\%^#!.*" display
syn keyword crystalTodo FIXME NOTE TODO OPTIMIZE XXX todo contained
syn match crystalComment "#.*" contains=crystalSharpBang,crystalSpaceError,crystalTodo,@Spell
if !exists('crystal_no_comment_fold')
syn region crystalMultilineComment start="\%(\%(^\s*#.*\n\)\@<!\%(^\s*#.*\n\)\)\%(\(^\s*#.*\n\)\{1,}\)\@=" end="\%(^\s*#.*\n\)\@<=\%(^\s*#.*\n\)\%(^\s*#\)\@!" contains=crystalComment transparent fold keepend
endif
" Note: this is a hack to prevent 'keywords' being highlighted as such when called as methods with an explicit receiver
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(alias\|begin\|break\|case\|class\|def\|defined\|do\|else\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(elsif\|end\|ensure\|false\|for\|if\|ifdef\|in\|module\|next\|nil\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(rescue\|return\|self\|super\|previous_def\|then\|true\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(undef\|unless\|until\|when\|while\|yield\|with\|__FILE__\|__LINE__\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\<\%(alias\|begin\|case\|class\|def\|do\|end\)[?!]" transparent contains=NONE
syn match crystalKeywordAsMethod "\<\%(if\|ifdef\|module\|undef\|unless\|until\|while\)[?!]" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(abort\|at_exit\|caller\|exit\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(extend\|fork\|include\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(loop\|private\|protected\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(require\|raise\)\>" transparent contains=NONE
syn match crystalKeywordAsMethod "\%(\%(\.\@<!\.\)\|::\)\_s*\%(typeof\|pointerof\|sizeof\|instance_sizeof\|\)\>" transparent contains=NONE
hi def link crystalClass crystalDefine
hi def link crystalModule crystalDefine
hi def link crystalStruct crystalDefine
hi def link crystalLib crystalDefine
hi def link crystalMacro crystalDefine
hi def link crystalEnum crystalDefine
hi def link crystalMethodExceptional crystalDefine
hi def link crystalDefine Define
hi def link crystalFunction Function
hi def link crystalConditional Conditional
hi def link crystalConditionalModifier crystalConditional
hi def link crystalExceptional crystalConditional
hi def link crystalRepeat Repeat
hi def link crystalRepeatModifier crystalRepeat
hi def link crystalOptionalDo crystalRepeat
hi def link crystalControl Statement
hi def link crystalInclude Include
hi def link crystalRecord Statement
hi def link crystalInteger Number
hi def link crystalASCIICode Character
hi def link crystalFloat Float
hi def link crystalBoolean Boolean
hi def link crystalException Exception
if !exists('crystal_no_identifiers')
hi def link crystalIdentifier Identifier
else
hi def link crystalIdentifier NONE
endif
hi def link crystalClassVariable crystalIdentifier
hi def link crystalConstant Type
hi def link crystalGlobalVariable crystalIdentifier
hi def link crystalBlockParameter crystalIdentifier
hi def link crystalInstanceVariable crystalIdentifier
hi def link crystalFreshVariable crystalIdentifier
hi def link crystalPredefinedIdentifier crystalIdentifier
hi def link crystalPredefinedConstant crystalPredefinedIdentifier
hi def link crystalPredefinedVariable crystalPredefinedIdentifier
hi def link crystalSymbol Constant
hi def link crystalKeyword Keyword
hi def link crystalOperator Operator
hi def link crystalAccess Statement
hi def link crystalAttribute Statement
hi def link crystalPseudoVariable Constant
hi def link crystalCharLiteral Character
hi def link crystalComment Comment
hi def link crystalTodo Todo
hi def link crystalStringEscape Special
hi def link crystalInterpolationDelimiter Delimiter
hi def link crystalNoInterpolation crystalString
hi def link crystalSharpBang PreProc
hi def link crystalRegexpDelimiter crystalStringDelimiter
hi def link crystalSymbolDelimiter crystalStringDelimiter
hi def link crystalStringDelimiter Delimiter
hi def link crystalHeredoc crystalString
hi def link crystalString String
hi def link crystalRegexpEscape crystalRegexpSpecial
hi def link crystalRegexpQuantifier crystalRegexpSpecial
hi def link crystalRegexpAnchor crystalRegexpSpecial
hi def link crystalRegexpDot crystalRegexpCharClass
hi def link crystalRegexpCharClass crystalRegexpSpecial
hi def link crystalRegexpSpecial Special
hi def link crystalRegexpComment Comment
hi def link crystalRegexp crystalString
hi def link crystalLinkAttr PreProc
hi def link crystalMacro PreProc
hi def link crystalInvalidVariable Error
hi def link crystalError Error
hi def link crystalSpaceError crystalError
let b:current_syntax = 'crystal'
" vim: nowrap sw=2 sts=2 ts=8 noet:
endif
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