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1 " Vim syntax file
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2 " Language: awk, nawk, gawk, mawk
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3 " Maintainer: Antonio Colombo <azc10@yahoo.com>
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4 " Last Change: 2005 Mar 16
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5
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6 " AWK ref. is: Alfred V. Aho, Brian W. Kernighan, Peter J. Weinberger
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7 " The AWK Programming Language, Addison-Wesley, 1988
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8
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9 " GAWK ref. is: Arnold D. Robbins
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10 " Effective AWK Programming, Third Edition, O'Reilly, 2001
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11
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12 " MAWK is a "new awk" meaning it implements AWK ref.
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13 " mawk conforms to the Posix 1003.2 (draft 11.3)
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14 " definition of the AWK language which contains a few features
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15 " not described in the AWK book, and mawk provides a small number of extensions.
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16
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17 " TODO:
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18 " Dig into the commented out syntax expressions below.
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19
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20 " For version 5.x: Clear all syntax items
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21 " For version 6.x: Quit when a syntax file was already loaded
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22 if version < 600
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23 syn clear
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24 elseif exists("b:current_syntax")
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25 finish
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26 endif
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27
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28 " A bunch of useful Awk keywords
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29 " AWK ref. p. 188
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30 syn keyword awkStatement break continue delete exit
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31 syn keyword awkStatement function getline next
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32 syn keyword awkStatement print printf return
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33 " GAWK ref. p. 117
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34 syn keyword awkStatement nextfile
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35 " AWK ref. p. 42, GAWK ref. p. 142-166
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36 syn keyword awkFunction atan2 close cos exp fflush int log rand sin sqrt srand
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37 syn keyword awkFunction gsub index length match split sprintf sub
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38 syn keyword awkFunction substr system
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39 " GAWK ref. p. 142-166
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40 syn keyword awkFunction asort gensub mktime strftime strtonum systime
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41 syn keyword awkFunction tolower toupper
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42 syn keyword awkFunction and or xor compl lshift rshift
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43 syn keyword awkFunction dcgettext bindtextdomain
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44
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45 syn keyword awkConditional if else
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46 syn keyword awkRepeat while for
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47
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48 syn keyword awkTodo contained TODO
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49
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50 syn keyword awkPatterns BEGIN END
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51 " AWK ref. p. 36
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52 syn keyword awkVariables ARGC ARGV FILENAME FNR FS NF NR
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53 syn keyword awkVariables OFMT OFS ORS RLENGTH RS RSTART SUBSEP
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54 " GAWK ref. p. 120-126
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55 syn keyword awkVariables ARGIND BINMODE CONVFMT ENVIRON ERRNO
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56 syn keyword awkVariables FIELDWIDTHS IGNORECASE LINT PROCINFO
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57 syn keyword awkVariables RT RLENGTH TEXTDOMAIN
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58
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59 syn keyword awkRepeat do
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60
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61 " Octal format character.
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62 syn match awkSpecialCharacter display contained "\\[0-7]\{1,3\}"
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63 syn keyword awkStatement func nextfile
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64 " Hex format character.
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65 syn match awkSpecialCharacter display contained "\\x[0-9A-Fa-f]\+"
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66
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67 syn match awkFieldVars "\$\d\+"
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68
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69 "catch errors caused by wrong parenthesis
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70 syn region awkParen transparent start="(" end=")" contains=ALLBUT,awkParenError,awkSpecialCharacter,awkArrayElement,awkArrayArray,awkTodo,awkRegExp,awkBrktRegExp,awkBrackets,awkCharClass
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71 syn match awkParenError display ")"
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72 syn match awkInParen display contained "[{}]"
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73
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74 " 64 lines for complex &&'s, and ||'s in a big "if"
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75 syn sync ccomment awkParen maxlines=64
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76
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77 " Search strings & Regular Expressions therein.
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78 syn region awkSearch oneline start="^[ \t]*/"ms=e start="\(,\|!\=\~\)[ \t]*/"ms=e skip="\\\\\|\\/" end="/" contains=awkBrackets,awkRegExp,awkSpecialCharacter
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79 syn region awkBrackets contained start="\[\^\]\="ms=s+2 start="\[[^\^]"ms=s+1 end="\]"me=e-1 contains=awkBrktRegExp,awkCharClass
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80 syn region awkSearch oneline start="[ \t]*/"hs=e skip="\\\\\|\\/" end="/" contains=awkBrackets,awkRegExp,awkSpecialCharacter
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81
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82 syn match awkCharClass contained "\[:[^:\]]*:\]"
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83 syn match awkBrktRegExp contained "\\.\|.\-[^]]"
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84 syn match awkRegExp contained "/\^"ms=s+1
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85 syn match awkRegExp contained "\$/"me=e-1
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86 syn match awkRegExp contained "[?.*{}|+]"
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87
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88 " String and Character constants
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89 " Highlight special characters (those which have a backslash) differently
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90 syn region awkString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=awkSpecialCharacter,awkSpecialPrintf
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91 syn match awkSpecialCharacter contained "\\."
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92
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93 " Some of these combinations may seem weird, but they work.
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94 syn match awkSpecialPrintf contained "%[-+ #]*\d*\.\=\d*[cdefgiosuxEGX%]"
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95
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96 " Numbers, allowing signs (both -, and +)
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97 " Integer number.
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98 syn match awkNumber display "[+-]\=\<\d\+\>"
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99 " Floating point number.
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100 syn match awkFloat display "[+-]\=\<\d\+\.\d+\>"
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101 " Floating point number, starting with a dot.
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102 syn match awkFloat display "[+-]\=\<.\d+\>"
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103 syn case ignore
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104 "floating point number, with dot, optional exponent
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105 syn match awkFloat display "\<\d\+\.\d*\(e[-+]\=\d\+\)\=\>"
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106 "floating point number, starting with a dot, optional exponent
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107 syn match awkFloat display "\.\d\+\(e[-+]\=\d\+\)\=\>"
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108 "floating point number, without dot, with exponent
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109 syn match awkFloat display "\<\d\+e[-+]\=\d\+\>"
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110 syn case match
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111
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112 "syn match awkIdentifier "\<[a-zA-Z_][a-zA-Z0-9_]*\>"
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113
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114 " Arithmetic operators: +, and - take care of ++, and --
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115 "syn match awkOperator "+\|-\|\*\|/\|%\|="
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116 "syn match awkOperator "+=\|-=\|\*=\|/=\|%="
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117 "syn match awkOperator "^\|^="
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118
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119 " Comparison expressions.
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120 "syn match awkExpression "==\|>=\|=>\|<=\|=<\|\!="
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121 "syn match awkExpression "\~\|\!\~"
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122 "syn match awkExpression "?\|:"
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123 "syn keyword awkExpression in
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124
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125 " Boolean Logic (OR, AND, NOT)
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126 "syn match awkBoolLogic "||\|&&\|\!"
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127
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128 " This is overridden by less-than & greater-than.
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129 " Put this above those to override them.
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130 " Put this in a 'match "\<printf\=\>.*;\="' to make it not override
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131 " less/greater than (most of the time), but it won't work yet because
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132 " keywords allways have precedence over match & region.
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133 " File I/O: (print foo, bar > "filename") & for nawk (getline < "filename")
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134 "syn match awkFileIO contained ">"
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135 "syn match awkFileIO contained "<"
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136
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137 " Expression separators: ';' and ','
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138 syn match awkSemicolon ";"
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139 syn match awkComma ","
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140
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141 syn match awkComment "#.*" contains=awkTodo
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142
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143 syn match awkLineSkip "\\$"
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144
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145 " Highlight array element's (recursive arrays allowed).
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146 " Keeps nested array names' separate from normal array elements.
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147 " Keeps numbers separate from normal array elements (variables).
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148 syn match awkArrayArray contained "[^][, \t]\+\["me=e-1
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149 syn match awkArrayElement contained "[^][, \t]\+"
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150 syn region awkArray transparent start="\[" end="\]" contains=awkArray,awkArrayElement,awkArrayArray,awkNumber,awkFloat
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151
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152 " 10 should be enough.
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153 " (for the few instances where it would be more than "oneline")
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154 syn sync ccomment awkArray maxlines=10
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155
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156 " define the default highlighting
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157 " For version 5.7 and earlier: only when not done already
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158 " For version 5.8 and later: only when an item doesn't have highlightling yet
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159 if version >= 508 || !exists("did_awk_syn_inits")
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160 if version < 508
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161 let did_awk_syn_inits = 1
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162 command -nargs=+ HiLink hi link <args>
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163 else
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164 command -nargs=+ HiLink hi def link <args>
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165 endif
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166
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167 HiLink awkConditional Conditional
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168 HiLink awkFunction Function
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169 HiLink awkRepeat Repeat
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170 HiLink awkStatement Statement
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171
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172 HiLink awkString String
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173 HiLink awkSpecialPrintf Special
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174 HiLink awkSpecialCharacter Special
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175
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176 HiLink awkSearch String
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177 HiLink awkBrackets awkRegExp
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178 HiLink awkBrktRegExp awkNestRegExp
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179 HiLink awkCharClass awkNestRegExp
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180 HiLink awkNestRegExp Keyword
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181 HiLink awkRegExp Special
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182
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183 HiLink awkNumber Number
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184 HiLink awkFloat Float
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185
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186 HiLink awkFileIO Special
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187 "HiLink awkOperator Special
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188 "HiLink awkExpression Special
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189 HiLink awkBoolLogic Special
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190
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191 HiLink awkPatterns Special
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192 HiLink awkVariables Special
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193 HiLink awkFieldVars Special
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194
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195 HiLink awkLineSkip Special
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196 HiLink awkSemicolon Special
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197 HiLink awkComma Special
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198 "HiLink awkIdentifier Identifier
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199
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200 HiLink awkComment Comment
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201 HiLink awkTodo Todo
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202
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203 " Change this if you want nested array names to be highlighted.
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204 HiLink awkArrayArray awkArray
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205 HiLink awkArrayElement Special
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206
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207 HiLink awkParenError awkError
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208 HiLink awkInParen awkError
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209 HiLink awkError Error
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210
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211 delcommand HiLink
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212 endif
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213
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214 let b:current_syntax = "awk"
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215
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216 " vim: ts=8
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