annotate runtime/syntax/lex.vim @ 23887:ee748fa7dcf5

Added tag v8.2.2485 for changeset eef0cffbdb9428995769586d41d8d28436f8f627
author Bram Moolenaar <Bram@vim.org>
date Sun, 07 Feb 2021 17:30:05 +0100
parents 29c5f168c6fd
children 02bd0fe77c68
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rev   line source
7
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1 " Vim syntax file
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2 " Language: Lex and Flex
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3 " Maintainer: Charles E. Campbell <NcampObell@SdrPchip.AorgM-NOSPAM>
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4 " Contributor: Robert A. van Engelen <engelen@acm.org>
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5 " Last Change: Apr 24, 2020
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6 " Version: 18
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7
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8 " quit when a syntax file was already loaded
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9 if exists("b:current_syntax")
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10 finish
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11 endif
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12
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13 " Read the C++ syntax to start with
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14 let s:Cpath= fnameescape(expand("<sfile>:p:h")."/cpp.vim")
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15 if !filereadable(s:Cpath)
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16 for s:Cpath in split(globpath(&rtp,"syntax/cpp.vim"),"\n")
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17 if filereadable(fnameescape(s:Cpath))
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18 let s:Cpath= fnameescape(s:Cpath)
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19 break
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20 endif
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21 endfor
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22 endif
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23 exe "syn include @lexCcode ".s:Cpath
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24
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25 " --- ========= ---
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26 " --- Lex stuff ---
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27 " --- ========= ---
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28
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29 " Definitions
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30 " %%
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31 " Rules
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32 " %%
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33 " User Code
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34 "
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35 " --- ======= ---
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36 " --- Example ---
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37 " --- ======= ---
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38 "
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39 " // this is a valid lex file
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40 " // indented initial code block
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41 " #include <stdlib.h>
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42 " %{
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43 " // initial code block
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44 " #include <stdio.h>
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45 " const char *sep = "";
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46 " %}
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47 " %option outfile="scanner.c" noyywrap nodefault
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48 " %x COMMENT
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49 " id [A-Za-z_][A-Za-z0-9_]*
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50 " %%
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51 " // indented initial action code block
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52 " printf("BEGIN");
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53 " {id} printf("%s%s", sep, yytext); sep = "";
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54 " . |
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55 " \n { sep = "\n"; }
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56 " "/*" { BEGIN COMMENT; }
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57 " "//".* { }
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58 " <COMMENT>{
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59 " "*/" { BEGIN INITIAL; }
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60 " .|\n
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61 " }
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62 " <*><<EOF>> { // end of file
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63 " printf("\nEND\n");
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64 " yyterminate();
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65 " }
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66 " %%
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67 " void scan()
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68 " {
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69 " while (yylex())
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70 " continue;
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71 " }
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72 " /* main program */
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73 " int main()
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74 " {
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75 " scan();
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76 " }
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77
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78 " Definitions Section with initial code blocks, abbreviations, options, states
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79 if has("folding")
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80 syn region lexAbbrvBlock fold start="^\S" end="^\ze%%" skipnl nextgroup=lexPatBlock contains=lexOptions,lexAbbrv,lexInitialCodeBlock,lexInclude,lexAbbrvComment,lexStartState
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81 else
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82 syn region lexAbbrvBlock start="^\S" end="^\ze%%" skipnl nextgroup=lexPatBlock contains=lexOptions,lexAbbrv,lexInitialCodeBlock,lexInclude,lexAbbrvComment,lexStartState
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83 endif
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84 syn match lexOptions "^%\a\+\(\s.*\|[^{]*\)$" contains=lexOptionsEq,lexPatString,lexSlashQuote,lexBrace,lexSlashBrace
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85 syn match lexOptionsEq "=" skipwhite contained
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86 syn match lexAbbrv "^\I\i*\s"me=e-1 skipwhite contained nextgroup=lexAbbrvPat
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87 syn match lexAbbrvPat "\s\S.*$"lc=1 contained contains=lexPatAbbrv,lexPatString,lexSlashQuote,lexBrace,lexSlashBrace nextgroup=lexAbbrv,lexInclude
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88 syn match lexStartState "^%\(xs\?\|s\)\(t\(a\(t\(e\?\)\?\)\?\)\?\)\?\(\s\+\I\i*\)\+\s*$" contained contains=lexStartStateCmd
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89 syn match lexStartStateCmd '^%\(xs\?\|s\)\(t\(a\(t\(e\?\)\?\)\?\)\?\)\?' contained
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90 if has("folding")
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91 syn region lexInitialCodeBlock fold start="^\s\+" end="^\S"me=e-1 contains=@lexCcode
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92 syn region lexInclude fold matchgroup=lexSep start="^%\a*{" end="^%\?}" contained contains=@lexCcode,lexCFunctions
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93 syn region lexAbbrvComment fold start="^\s*//" end="$" contains=@Spell
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94 syn region lexAbbrvComment fold start="^\s*/\*" end="\*/" contains=@Spell
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95 else
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96 syn region lexInitialCodeBlock start="^\s\+" end="^\S"me=e-1 contains=@lexCcode
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97 syn region lexInclude matchgroup=lexSep start="^%\a*{" end="^%\?}" contained contains=@lexCcode,lexCFunctions
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98 syn region lexAbbrvComment start="^\s*//" end="$" contains=@Spell
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99 syn region lexAbbrvComment start="^\s*/\*" end="\*/" contains=@Spell
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100 endif
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101
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102 " Rules Section with patterns and actions
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103 if has("folding")
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104 syn region lexPatBlock fold matchgroup=Todo start="^%%" matchgroup=Todo end="^\ze%%" skipnl skipwhite nextgroup=lexFinalCodeBlock contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude
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105 syn region lexPat fold start="\S" skip="\\\\\|\\\s" end="\ze\(\s*$\|\s\+\(\h\|{\W\|{$\|[-+*]\|//\|/\*\)\)" skipwhite contained nextgroup=lexMorePat,lexPatSep,lexPatEnd contains=lexPatTag,lexPatString,lexSlashQuote,lexPatAbbrv,lexBrace,lexSlashBrace
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106 syn region lexPatInclude fold matchgroup=lexSep start="^%{" end="^%}" contained contains=@lexCcode
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107 syn region lexBrace fold matchgroup=Character start="\[" skip="\\.\|\[:\a\+:\]\|\[\.\a\+\.\]\|\[=.=\]" end="\]" contained
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108 syn region lexPatString fold matchgroup=String start=+"+ skip=+\\\\\|\\"+ matchgroup=String end=+"+ contained
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109 else
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110 syn region lexPatBlock matchgroup=Todo start="^%%" matchgroup=Todo end="^\ze%%" skipnl skipwhite nextgroup=lexFinalCodeBlock contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude
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111 syn region lexPat start="\S" skip="\\\\\|\\\s" end="\ze\(\s*$\|\s\+\(\h\|{\W\|{$\|[-+*]\|//\|/\*\)\)" skipwhite contained nextgroup=lexMorePat,lexPatSep,lexPatEnd contains=lexPatTag,lexPatString,lexSlashQuote,lexPatAbbrv,lexBrace,lexSlashBrace
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112 syn region lexPatInclude matchgroup=lexSep start="^%{" end="^%}" contained contains=@lexCcode
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113 syn region lexBrace matchgroup=Character start="\[" skip="\\.\|\[:\a\+:\]\|\[\.\a\+\.\]\|\[=.=\]" end="\]" contained
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114 syn region lexPatString matchgroup=String start=+"+ skip=+\\\\\|\\"+ matchgroup=String end=+"+ contained
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115 endif
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116 syn match lexPatAbbrv "{\I\i*}"hs=s+1,he=e-1 contained
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117 syn match lexPatTag "^<\^\?\(\I\i*\|\*\)\(,\^\?\(\I\i*\|\*\)\)*>" contained nextgroup=lexPat,lexMorePat,lexPatSep,lexPatEnd
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118 syn match lexPatTagZone "^<\^\?\(\I\i*\|\*\)\(,\^\?\(\I\i*\|\*\)\)*>\s*{$"me=e-1 contained nextgroup=lexPatTagZoneStart
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119
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120 if has("folding")
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121 syn region lexPatTagZoneStart fold matchgroup=lexPatTag start='{$' end='^}' skipnl skipwhite contained contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude
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122 syn region lexPatComment fold start="//" end="$" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell
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123 syn region lexPatComment fold start="/\*" end="\*/" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell
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124 else
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125 syn region lexPatTagZoneStart matchgroup=lexPatTag start='{' end='^}' skipnl skipwhite contained contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude
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126 syn region lexPatComment start="//" end="$" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell
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127 syn region lexPatComment start="/\*" end="\*/" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell
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128 endif
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129 syn match lexPatEnd "\s*$" skipnl contained
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130 syn match lexPatCodeLine "[^{\[].*" contained contains=@lexCcode,lexCFunctions
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131 syn match lexMorePat "\s*|\s*$" skipnl contained nextgroup=lexPat,lexPatTag,lexPatComment
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132 syn match lexPatSep "\s\+" contained nextgroup=lexMorePat,lexPatCode,lexPatCodeLine
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133 syn match lexSlashQuote +\(\\\\\)*\\"+ contained
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134 syn match lexSlashBrace +\(\\\\\)*\\\[+ contained
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135 if has("folding")
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136 syn region lexPatCode fold matchgroup=Delimiter start="{" end="}" skipnl contained contains=@lexCcode,lexCFunctions
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137 else
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138 syn region lexPatCode matchgroup=Delimiter start="{" end="}" skipnl contained contains=@lexCcode,lexCFunctions
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139 endif
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140
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141 " User Code Section with final code block
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142 syn region lexFinalCodeBlock matchgroup=Todo start="^%%" end="\%$" contained contains=@lexCcode
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143
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144 " Lex macros which may appear in C/C++ code blocks
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145 syn keyword lexCFunctions BEGIN ECHO REJECT yytext YYText yyleng YYLeng yymore yyless yywrap yylook
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146 syn keyword lexCFunctions yyrestart yyterminate yylineno yycolumno yyin yyout
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147 syn keyword lexCFunctions input unput output winput wunput woutput
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148 syn keyword lexCFunctions yyinput yyunput yyoutput yywinput yywunput yywoutput
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149
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150 " <c.vim> includes several ALLBUTs; these have to be treated so as to exclude lex* groups
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151 syn cluster cParenGroup add=lex.*
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152 syn cluster cDefineGroup add=lex.*
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153 syn cluster cPreProcGroup add=lex.*
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154 syn cluster cMultiGroup add=lex.*
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155
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156 " Synchronization
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157 syn sync clear
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158 syn sync minlines=500
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159 syn sync match lexSyncPat grouphere lexPatBlock "^%[a-zA-Z]"
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160 syn sync match lexSyncPat groupthere lexPatBlock "^<$"
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161 syn sync match lexSyncPat groupthere lexPatBlock "^%%"
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162
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163 " The default highlighting.
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164 if !exists("skip_lex_syntax_inits")
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165 hi def link lexAbbrvComment lexPatComment
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166 hi def link lexAbbrvPat lexPat
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167 hi def link lexAbbrv Special
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168 hi def link lexBrace lexPat
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169 hi def link lexCFunctions PreProc
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170 hi def link lexMorePat Special
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171 hi def link lexOptions PreProc
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172 hi def link lexOptionsEq Operator
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173 hi def link lexPatComment Comment
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174 hi def link lexPat Function
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175 hi def link lexPatString lexPat
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176 hi def link lexPatAbbrv Special
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177 hi def link lexPatTag Statement
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178 hi def link lexPatTagZone lexPatTag
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179 hi def link lexSep Delimiter
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180 hi def link lexSlashQuote lexPat
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181 hi def link lexSlashBrace lexPat
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182 hi def link lexStartState lexPatTag
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183 hi def link lexStartStateCmd Special
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184 endif
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185
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186 let b:current_syntax = "lex"
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187
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188 " vim:ts=8