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" Vim syntax file
" Language: R (GNU S)
" Maintainer: Tom Payne <tom@tompayne.org>
" Last Change: 2003 May 11
" Filenames: *.r
" URL: http://www.tompayne.org/vim/syntax/r.vim
" For version 5.x: Clear all syntax items
" For version 6.x: Quit when a syntax file was already loaded
if version < 600
syntax clear
elseif exists("b:current_syntax")
finish
endif
if version >= 600
setlocal iskeyword=@,48-57,_,.
else
set iskeyword=@,48-57,_,.
endif
syn case match
" Comment
syn match rComment /\#.*/
" Constant
" string enclosed in double quotes
syn region rString start=/"/ skip=/\\\\\|\\"/ end=/"/
" string enclosed in single quotes
syn region rString start=/'/ skip=/\\\\\|\\'/ end=/'/
" number with no fractional part or exponent
syn match rNumber /\d\+/
" floating point number with integer and fractional parts and optional exponent
syn match rFloat /\d\+\.\d*\([Ee][-+]\=\d\+\)\=/
" floating point number with no integer part and optional exponent
syn match rFloat /\.\d\+\([Ee][-+]\=\d\+\)\=/
" floating point number with no fractional part and optional exponent
syn match rFloat /\d\+[Ee][-+]\=\d\+/
" Identifier
" identifier with leading letter and optional following keyword characters
syn match rIdentifier /\a\k*/
" identifier with leading period, one or more digits, and at least one non-digit keyword character
syn match rIdentifier /\.\d*\K\k*/
" Statement
syn keyword rStatement break next return
syn keyword rConditional if else
syn keyword rRepeat for in repeat while
" Constant
syn keyword rConstant LETTERS letters month.ab month.name pi
syn keyword rConstant NULL
syn keyword rBoolean FALSE TRUE
syn keyword rNumber NA
" Type
syn keyword rType array category character complex double function integer list logical matrix numeric vector
" Special
syn match rDelimiter /[,;:]/
" Error
syn region rRegion matchgroup=Delimiter start=/(/ matchgroup=Delimiter end=/)/ transparent contains=ALLBUT,rError,rBraceError,rCurlyError
syn region rRegion matchgroup=Delimiter start=/{/ matchgroup=Delimiter end=/}/ transparent contains=ALLBUT,rError,rBraceError,rParenError
syn region rRegion matchgroup=Delimiter start=/\[/ matchgroup=Delimiter end=/]/ transparent contains=ALLBUT,rError,rCurlyError,rParenError
syn match rError /[)\]}]/
syn match rBraceError /[)}]/ contained
syn match rCurlyError /[)\]]/ contained
syn match rParenError /[\]}]/ contained
" Define the default highlighting.
" For version 5.7 and earlier: only when not done already
" For version 5.8 and later: only when an item doesn't have highlighting yet
if version >= 508 || !exists("did_r_syn_inits")
if version < 508
let did_r_syn_inits = 1
command -nargs=+ HiLink hi link <args>
else
command -nargs=+ HiLink hi def link <args>
endif
HiLink rComment Comment
HiLink rConstant Constant
HiLink rString String
HiLink rNumber Number
HiLink rBoolean Boolean
HiLink rFloat Float
HiLink rStatement Statement
HiLink rConditional Conditional
HiLink rRepeat Repeat
HiLink rIdentifier Identifier
HiLink rType Type
HiLink rDelimiter Delimiter
HiLink rError Error
HiLink rBraceError Error
HiLink rCurlyError Error
HiLink rParenError Error
delcommand HiLink
endif
let b:current_syntax="r"
" vim: ts=8 sw=2
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