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1 " Vim syntax file
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2 " Language: R (GNU S)
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3 " Maintainer: Vaidotas Zemlys <zemlys@gmail.com>
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4 " Last Change: 2006 Apr 30
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5 " Filenames: *.R *.Rout *.r *.Rhistory *.Rt *.Rout.save *.Rout.fail
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6 " URL: http://uosis.mif.vu.lt/~zemlys/vim-syntax/r.vim
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7
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8 " First maintainer Tom Payne <tom@tompayne.org>
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9 " Modified to make syntax less colourful and added the highlighting of
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10 " R assignment arrow
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11
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12 " For version 5.x: Clear all syntax items
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13 " For version 6.x: Quit when a syntax file was already loaded
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14 if version < 600
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15 syntax clear
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16 elseif exists("b:current_syntax")
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17 finish
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18 endif
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19
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20 if version >= 600
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21 setlocal iskeyword=@,48-57,_,.
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22 else
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23 set iskeyword=@,48-57,_,.
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24 endif
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25
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26 syn case match
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27
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28 " Comment
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29 syn match rComment /\#.*/
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30
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31 " Constant
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32 " string enclosed in double quotes
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33 syn region rString start=/"/ skip=/\\\\\|\\"/ end=/"/
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34 " string enclosed in single quotes
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35 syn region rString start=/'/ skip=/\\\\\|\\'/ end=/'/
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36 " number with no fractional part or exponent
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37 syn match rNumber /\d\+/
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38 " floating point number with integer and fractional parts and optional exponent
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39 syn match rFloat /\d\+\.\d*\([Ee][-+]\=\d\+\)\=/
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40 " floating point number with no integer part and optional exponent
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41 syn match rFloat /\.\d\+\([Ee][-+]\=\d\+\)\=/
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42 " floating point number with no fractional part and optional exponent
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43 syn match rFloat /\d\+[Ee][-+]\=\d\+/
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44
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45 " Identifier
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46 " identifier with leading letter and optional following keyword characters
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47 syn match rIdentifier /\a\k*/
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48 " identifier with leading period, one or more digits, and at least one non-digit keyword character
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49 syn match rIdentifier /\.\d*\K\k*/
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50
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51 " Statement
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52 syn keyword rStatement break next return
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53 syn keyword rConditional if else
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54 syn keyword rRepeat for in repeat while
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55
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56 " Constant
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57 syn keyword rConstant LETTERS letters month.ab month.name pi
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58 syn keyword rConstant NULL
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59 syn keyword rBoolean FALSE TRUE
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60 syn keyword rNumber NA
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61 syn match rArrow /<\{1,2}-/
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62
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63 " Type
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64 syn keyword rType array category character complex double function integer list logical matrix numeric vector data.frame
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65
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66 " Special
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67 syn match rDelimiter /[,;:]/
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68
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69 " Error
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70 syn region rRegion matchgroup=Delimiter start=/(/ matchgroup=Delimiter end=/)/ transparent contains=ALLBUT,rError,rBraceError,rCurlyError
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71 syn region rRegion matchgroup=Delimiter start=/{/ matchgroup=Delimiter end=/}/ transparent contains=ALLBUT,rError,rBraceError,rParenError
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72 syn region rRegion matchgroup=Delimiter start=/\[/ matchgroup=Delimiter end=/]/ transparent contains=ALLBUT,rError,rCurlyError,rParenError
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73 syn match rError /[)\]}]/
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74 syn match rBraceError /[)}]/ contained
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75 syn match rCurlyError /[)\]]/ contained
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76 syn match rParenError /[\]}]/ contained
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77
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78 " Define the default highlighting.
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79 " For version 5.7 and earlier: only when not done already
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80 " For version 5.8 and later: only when an item doesn't have highlighting yet
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81 if version >= 508 || !exists("did_r_syn_inits")
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82 if version < 508
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83 let did_r_syn_inits = 1
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84 command -nargs=+ HiLink hi link <args>
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85 else
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86 command -nargs=+ HiLink hi def link <args>
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87 endif
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88 HiLink rComment Comment
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89 HiLink rConstant Constant
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90 HiLink rString String
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91 HiLink rNumber Number
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92 HiLink rBoolean Boolean
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93 HiLink rFloat Float
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94 HiLink rStatement Statement
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95 HiLink rConditional Conditional
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96 HiLink rRepeat Repeat
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97 HiLink rIdentifier Normal
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98 HiLink rArrow Statement
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99 HiLink rType Type
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100 HiLink rDelimiter Delimiter
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101 HiLink rError Error
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102 HiLink rBraceError Error
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103 HiLink rCurlyError Error
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104 HiLink rParenError Error
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105 delcommand HiLink
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106 endif
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107
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108 let b:current_syntax="r"
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109
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110 " vim: ts=8 sw=2
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111
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