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haskell.vim
" Vim syntax file " Language: Haskell " Maintainer: Haskell Cafe mailinglist <haskell-cafe@haskell.org> " Last Change: 2020 Oct 4 by Marcin Szamotulski <profunctor@pm.me> " Original Author: John Williams <jrw@pobox.com> " " Thanks to Ryan Crumley for suggestions and John Meacham for " pointing out bugs. Also thanks to Ian Lynagh and Donald Bruce Stewart " for providing the inspiration for the inclusion of the handling " of C preprocessor directives, and for pointing out a bug in the " end-of-line comment handling. " " Options-assign a value to these variables to turn the option on: " " hs_highlight_delimiters - Highlight delimiter characters--users " with a light-colored background will " probably want to turn this on. " hs_highlight_boolean - Treat True and False as keywords. " hs_highlight_types - Treat names of primitive types as keywords. " hs_highlight_more_types - Treat names of other common types as keywords. " hs_highlight_debug - Highlight names of debugging functions. " hs_allow_hash_operator - Don't highlight seemingly incorrect C " preprocessor directives but assume them to be " operators " " 2004 Feb 19: Added C preprocessor directive handling, corrected eol comments " cleaned away literate haskell support (should be entirely in " lhaskell.vim) " 2004 Feb 20: Cleaned up C preprocessor directive handling, fixed single \ " in eol comment character class " 2004 Feb 23: Made the leading comments somewhat clearer where it comes " to attribution of work. " 2008 Dec 15: Added comments as contained element in import statements " quit when a syntax file was already loaded if exists("b:current_syntax") finish endif " (Qualified) identifiers (no default highlighting) syn match ConId "\(\<[A-Z][a-zA-Z0-9_']*\.\)*\<[A-Z][a-zA-Z0-9_']*\>" contains=@NoSpell syn match VarId "\(\<[A-Z][a-zA-Z0-9_']*\.\)*\<[a-z][a-zA-Z0-9_']*\>" contains=@NoSpell " Infix operators--most punctuation characters and any (qualified) identifier " enclosed in `backquotes`. An operator starting with : is a constructor, " others are variables (e.g. functions). syn match hsVarSym "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[-!#$%&\*\+/<=>\?@\\^|~.][-!#$%&\*\+/<=>\?@\\^|~:.]*" syn match hsConSym "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=:[-!#$%&\*\+./<=>\?@\\^|~:]*" syn match hsVarSym "`\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[a-z][a-zA-Z0-9_']*`" syn match hsConSym "`\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[A-Z][a-zA-Z0-9_']*`" " (Non-qualified) identifiers which start with # are labels syn match hsLabel "#[a-z][a-zA-Z0-9_']*\>" " Reserved symbols--cannot be overloaded. syn match hsDelimiter "(\|)\|\[\|\]\|,\|;\|{\|}" " Strings and constants syn match hsSpecialChar contained "\\\([0-9]\+\|o[0-7]\+\|x[0-9a-fA-F]\+\|[\"\\'&\\abfnrtv]\|^[A-Z^_\[\\\]]\)" syn match hsSpecialChar contained "\\\(NUL\|SOH\|STX\|ETX\|EOT\|ENQ\|ACK\|BEL\|BS\|HT\|LF\|VT\|FF\|CR\|SO\|SI\|DLE\|DC1\|DC2\|DC3\|DC4\|NAK\|SYN\|ETB\|CAN\|EM\|SUB\|ESC\|FS\|GS\|RS\|US\|SP\|DEL\)" syn match hsSpecialCharError contained "\\&\|'''\+" syn region hsString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=hsSpecialChar,@NoSpell syn match hsCharacter "[^a-zA-Z0-9_']'\([^\\]\|\\[^']\+\|\\'\)'"lc=1 contains=hsSpecialChar,hsSpecialCharError syn match hsCharacter "^'\([^\\]\|\\[^']\+\|\\'\)'" contains=hsSpecialChar,hsSpecialCharError syn match hsNumber "\v<[0-9]%(_*[0-9])*>|<0[xX]_*[0-9a-fA-F]%(_*[0-9a-fA-F])*>|<0[oO]_*%(_*[0-7])*>|<0[bB]_*[01]%(_*[01])*>" syn match hsFloat "\v<[0-9]%(_*[0-9])*\.[0-9]%(_*[0-9])*%(_*[eE][-+]?[0-9]%(_*[0-9])*)?>|<[0-9]%(_*[0-9])*_*[eE][-+]?[0-9]%(_*[0-9])*>|<0[xX]_*[0-9a-fA-F]%(_*[0-9a-fA-F])*\.[0-9a-fA-F]%(_*[0-9a-fA-F])*%(_*[pP][-+]?[0-9]%(_*[0-9])*)?>|<0[xX]_*[0-9a-fA-F]%(_*[0-9a-fA-F])*_*[pP][-+]?[0-9]%(_*[0-9])*>" " Keyword definitions. syn keyword hsModule module syn match hsImportGroup "\<import\>.*" contains=hsImport,hsImportModuleName,hsImportMod,hsLineComment,hsBlockComment,hsImportList,@NoSpell nextgroup=hsImport syn keyword hsImport import contained nextgroup=hsImportModuleName syn match hsImportModuleName '\<[A-Z][A-Za-z.]*' contained syn region hsImportList start='(' skip='([^)]\{-})' end=')' keepend contained contains=ConId,VarId,hsDelimiter,hsBlockComment,hsTypedef,@NoSpell syn keyword hsImportMod contained as qualified hiding syn keyword hsInfix infix infixl infixr syn keyword hsStructure class data deriving instance default where syn keyword hsTypedef type syn keyword hsNewtypedef newtype syn keyword hsTypeFam family syn keyword hsStatement mdo do case of let in syn keyword hsConditional if then else " Not real keywords, but close. if exists("hs_highlight_boolean") " Boolean constants from the standard prelude. syn keyword hsBoolean True False endif if exists("hs_highlight_types") " Primitive types from the standard prelude and libraries. syn keyword hsType Int Integer Char Bool Float Double IO Void Addr Array String endif if exists("hs_highlight_more_types") " Types from the standard prelude libraries. syn keyword hsType Maybe Either Ratio Complex Ordering IOError IOResult ExitCode syn keyword hsMaybe Nothing syn keyword hsExitCode ExitSuccess syn keyword hsOrdering GT LT EQ endif if exists("hs_highlight_debug") " Debugging functions from the standard prelude. syn keyword hsDebug undefined error trace endif " Comments syn match hsLineComment "---*\([^-!#$%&\*\+./<=>\?@\\^|~].*\)\?$" contains=@Spell syn region hsBlockComment start="{-" end="-}" contains=hsBlockComment,@Spell syn region hsPragma start="{-#" end="#-}" " C Preprocessor directives. Shamelessly ripped from c.vim and trimmed " First, see whether to flag directive-like lines or not if (!exists("hs_allow_hash_operator")) syn match cError display "^\s*\(%:\|#\).*$" endif " Accept %: for # (C99) syn region cPreCondit start="^\s*\(%:\|#\)\s*\(if\|ifdef\|ifndef\|elif\)\>" skip="\\$" end="$" end="//"me=s-1 contains=cComment,cCppString,cCommentError syn match cPreCondit display "^\s*\(%:\|#\)\s*\(else\|endif\)\>" syn region cCppOut start="^\s*\(%:\|#\)\s*if\s\+0\+\>" end=".\@=\|$" contains=cCppOut2 syn region cCppOut2 contained start="0" end="^\s*\(%:\|#\)\s*\(endif\>\|else\>\|elif\>\)" contains=cCppSkip syn region cCppSkip contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cCppSkip syn region cIncluded display contained start=+"+ skip=+\\\\\|\\"+ end=+"+ syn match cIncluded display contained "<[^>]*>" syn match cInclude display "^\s*\(%:\|#\)\s*include\>\s*["<]" contains=cIncluded syn cluster cPreProcGroup contains=cPreCondit,cIncluded,cInclude,cDefine,cCppOut,cCppOut2,cCppSkip,cCommentStartError syn region cDefine matchgroup=cPreCondit start="^\s*\(%:\|#\)\s*\(define\|undef\)\>" skip="\\$" end="$" syn region cPreProc matchgroup=cPreCondit start="^\s*\(%:\|#\)\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend syn region cComment matchgroup=cCommentStart start="/\*" end="\*/" contains=cCommentStartError,cSpaceError contained syntax match cCommentError display "\*/" contained syntax match cCommentStartError display "/\*"me=e-1 contained syn region cCppString start=+L\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial contained " Define the default highlighting. " Only when an item doesn't have highlighting yet hi def link hsModule hsStructure hi def link hsImport Include hi def link hsImportMod hsImport hi def link hsInfix PreProc hi def link hsStructure Structure hi def link hsStatement Statement hi def link hsConditional Conditional hi def link hsSpecialChar SpecialChar hi def link hsTypedef Typedef hi def link hsNewtypedef Typedef hi def link hsVarSym hsOperator hi def link hsConSym hsOperator hi def link hsOperator Operator hi def link hsTypeFam Structure if exists("hs_highlight_delimiters") " Some people find this highlighting distracting. hi def link hsDelimiter Delimiter endif hi def link hsSpecialCharError Error hi def link hsString String hi def link hsCharacter Character hi def link hsNumber Number hi def link hsFloat Float hi def link hsConditional Conditional hi def link hsLiterateComment hsComment hi def link hsBlockComment hsComment hi def link hsLineComment hsComment hi def link hsComment Comment hi def link hsPragma SpecialComment hi def link hsBoolean Boolean hi def link hsType Type hi def link hsMaybe hsEnumConst hi def link hsOrdering hsEnumConst hi def link hsEnumConst Constant hi def link hsDebug Debug hi def link hsLabel Special hi def link cCppString hsString hi def link cCommentStart hsComment hi def link cCommentError hsError hi def link cCommentStartError hsError hi def link cInclude Include hi def link cPreProc PreProc hi def link cDefine Macro hi def link cIncluded hsString hi def link cError Error hi def link cPreCondit PreCondit hi def link cComment Comment hi def link cCppSkip cCppOut hi def link cCppOut2 cCppOut hi def link cCppOut Comment let b:current_syntax = "haskell" " Options for vi: ts=8 sw=2 sts=2 nowrap noexpandtab ft=vim
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