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Diffstat (limited to '')
| -rw-r--r-- | runtime/syntax/lex.vim | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/runtime/syntax/lex.vim b/runtime/syntax/lex.vim new file mode 100644 index 0000000..82197ad --- /dev/null +++ b/runtime/syntax/lex.vim @@ -0,0 +1,188 @@ +" Vim syntax file +" Language: Lex and Flex +" Maintainer: Charles E. Campbell <NcampObell@SdrPchip.AorgM-NOSPAM> +" Contributor: Robert A. van Engelen <engelen@acm.org> +" Last Change: Apr 24, 2020 +" Version: 18 + +" quit when a syntax file was already loaded +if exists("b:current_syntax") + finish +endif + +" Read the C++ syntax to start with +let s:Cpath= fnameescape(expand("<sfile>:p:h")."/cpp.vim") +if !filereadable(s:Cpath) + for s:Cpath in split(globpath(&rtp,"syntax/cpp.vim"),"\n") + if filereadable(fnameescape(s:Cpath)) + let s:Cpath= fnameescape(s:Cpath) + break + endif + endfor +endif +exe "syn include @lexCcode ".s:Cpath + +" --- ========= --- +" --- Lex stuff --- +" --- ========= --- + +" Definitions +" %% +" Rules +" %% +" User Code +" +" --- ======= --- +" --- Example --- +" --- ======= --- +" +" // this is a valid lex file +" // indented initial code block +" #include <stdlib.h> +" %{ +" // initial code block +" #include <stdio.h> +" const char *sep = ""; +" %} +" %option outfile="scanner.c" noyywrap nodefault +" %x COMMENT +" id [A-Za-z_][A-Za-z0-9_]* +" %% +" // indented initial action code block +" printf("BEGIN"); +" {id} printf("%s%s", sep, yytext); sep = ""; +" . | +" \n { sep = "\n"; } +" "/*" { BEGIN COMMENT; } +" "//".* { } +" <COMMENT>{ +" "*/" { BEGIN INITIAL; } +" .|\n +" } +" <*><<EOF>> { // end of file +" printf("\nEND\n"); +" yyterminate(); +" } +" %% +" void scan() +" { +" while (yylex()) +" continue; +" } +" /* main program */ +" int main() +" { +" scan(); +" } + +" Definitions Section with initial code blocks, abbreviations, options, states +if has("folding") + syn region lexAbbrvBlock fold start="^\S" end="^\ze%%" skipnl nextgroup=lexPatBlock contains=lexOptions,lexAbbrv,lexInitialCodeBlock,lexInclude,lexAbbrvComment,lexStartState +else + syn region lexAbbrvBlock start="^\S" end="^\ze%%" skipnl nextgroup=lexPatBlock contains=lexOptions,lexAbbrv,lexInitialCodeBlock,lexInclude,lexAbbrvComment,lexStartState +endif +syn match lexOptions "^%\a\+\(\s.*\|[^{]*\)$" contains=lexOptionsEq,lexPatString,lexSlashQuote,lexBrace,lexSlashBrace +syn match lexOptionsEq "=" skipwhite contained +syn match lexAbbrv "^\I\i*\s"me=e-1 skipwhite contained nextgroup=lexAbbrvPat +syn match lexAbbrvPat "\s\S.*$"lc=1 contained contains=lexPatAbbrv,lexPatString,lexSlashQuote,lexBrace,lexSlashBrace nextgroup=lexAbbrv,lexInclude +syn match lexStartState "^%\(xs\?\|s\)\(t\(a\(t\(e\?\)\?\)\?\)\?\)\?\(\s\+\I\i*\)\+\s*$" contained contains=lexStartStateCmd +syn match lexStartStateCmd '^%\(xs\?\|s\)\(t\(a\(t\(e\?\)\?\)\?\)\?\)\?' contained +if has("folding") + syn region lexInitialCodeBlock fold start="^\s\+" end="^\S"me=e-1 contains=@lexCcode + syn region lexInclude fold matchgroup=lexSep start="^%\a*{" end="^%\?}" contained contains=@lexCcode,lexCFunctions + syn region lexAbbrvComment fold start="^\s*//" end="$" contains=@Spell + syn region lexAbbrvComment fold start="^\s*/\*" end="\*/" contains=@Spell +else + syn region lexInitialCodeBlock start="^\s\+" end="^\S"me=e-1 contains=@lexCcode + syn region lexInclude matchgroup=lexSep start="^%\a*{" end="^%\?}" contained contains=@lexCcode,lexCFunctions + syn region lexAbbrvComment start="^\s*//" end="$" contains=@Spell + syn region lexAbbrvComment start="^\s*/\*" end="\*/" contains=@Spell +endif + +" Rules Section with patterns and actions +if has("folding") + syn region lexPatBlock fold matchgroup=Todo start="^%%" matchgroup=Todo end="^\ze%%" skipnl skipwhite nextgroup=lexFinalCodeBlock contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude + 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 + syn region lexPatInclude fold matchgroup=lexSep start="^%{" end="^%}" contained contains=@lexCcode + syn region lexBrace fold matchgroup=Character start="\[" skip="\\.\|\[:\a\+:\]\|\[\.\a\+\.\]\|\[=.=\]" end="\]" contained + syn region lexPatString fold matchgroup=String start=+"+ skip=+\\\\\|\\"+ matchgroup=String end=+"+ contained +else + syn region lexPatBlock matchgroup=Todo start="^%%" matchgroup=Todo end="^\ze%%" skipnl skipwhite nextgroup=lexFinalCodeBlock contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude + 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 + syn region lexPatInclude matchgroup=lexSep start="^%{" end="^%}" contained contains=@lexCcode + syn region lexBrace matchgroup=Character start="\[" skip="\\.\|\[:\a\+:\]\|\[\.\a\+\.\]\|\[=.=\]" end="\]" contained + syn region lexPatString matchgroup=String start=+"+ skip=+\\\\\|\\"+ matchgroup=String end=+"+ contained +endif +syn match lexPatAbbrv "{\I\i*}"hs=s+1,he=e-1 contained +syn match lexPatTag "^<\^\?\(\I\i*\|\*\)\(,\^\?\(\I\i*\|\*\)\)*>" contained nextgroup=lexPat,lexMorePat,lexPatSep,lexPatEnd +syn match lexPatTagZone "^<\^\?\(\I\i*\|\*\)\(,\^\?\(\I\i*\|\*\)\)*>\s*{$"me=e-1 contained nextgroup=lexPatTagZoneStart + +if has("folding") + syn region lexPatTagZoneStart fold matchgroup=lexPatTag start='{$' end='^}' skipnl skipwhite contained contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude + syn region lexPatComment fold start="//" end="$" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell + syn region lexPatComment fold start="/\*" end="\*/" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell +else + syn region lexPatTagZoneStart matchgroup=lexPatTag start='{' end='^}' skipnl skipwhite contained contains=lexPatTag,lexPatTagZone,lexPatComment,lexPat,lexPatSep,lexPatInclude + syn region lexPatComment start="//" end="$" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell + syn region lexPatComment start="/\*" end="\*/" skipnl contained contains=cTodo skipwhite nextgroup=lexPatComment,lexPat,@Spell +endif +syn match lexPatEnd "\s*$" skipnl contained +syn match lexPatCodeLine "[^{\[].*" contained contains=@lexCcode,lexCFunctions +syn match lexMorePat "\s*|\s*$" skipnl contained nextgroup=lexPat,lexPatTag,lexPatComment +syn match lexPatSep "\s\+" contained nextgroup=lexMorePat,lexPatCode,lexPatCodeLine +syn match lexSlashQuote +\(\\\\\)*\\"+ contained +syn match lexSlashBrace +\(\\\\\)*\\\[+ contained +if has("folding") + syn region lexPatCode fold matchgroup=Delimiter start="{" end="}" skipnl contained contains=@lexCcode,lexCFunctions +else + syn region lexPatCode matchgroup=Delimiter start="{" end="}" skipnl contained contains=@lexCcode,lexCFunctions +endif + +" User Code Section with final code block +syn region lexFinalCodeBlock matchgroup=Todo start="^%%" end="\%$" contained contains=@lexCcode + +" Lex macros which may appear in C/C++ code blocks +syn keyword lexCFunctions BEGIN ECHO REJECT yytext YYText yyleng YYLeng yymore yyless yywrap yylook +syn keyword lexCFunctions yyrestart yyterminate yylineno yycolumno yyin yyout +syn keyword lexCFunctions input unput output winput wunput woutput +syn keyword lexCFunctions yyinput yyunput yyoutput yywinput yywunput yywoutput + +" <c.vim> includes several ALLBUTs; these have to be treated so as to exclude lex* groups +syn cluster cParenGroup add=lex.* +syn cluster cDefineGroup add=lex.* +syn cluster cPreProcGroup add=lex.* +syn cluster cMultiGroup add=lex.* + +" Synchronization +syn sync clear +syn sync minlines=500 +syn sync match lexSyncPat grouphere lexPatBlock "^%[a-zA-Z]" +syn sync match lexSyncPat groupthere lexPatBlock "^<$" +syn sync match lexSyncPat groupthere lexPatBlock "^%%" + +" The default highlighting. +if !exists("skip_lex_syntax_inits") + hi def link lexAbbrvComment lexPatComment + hi def link lexAbbrvPat lexPat + hi def link lexAbbrv Special + hi def link lexBrace lexPat + hi def link lexCFunctions PreProc + hi def link lexMorePat Special + hi def link lexOptions PreProc + hi def link lexOptionsEq Operator + hi def link lexPatComment Comment + hi def link lexPat Function + hi def link lexPatString lexPat + hi def link lexPatAbbrv Special + hi def link lexPatTag Statement + hi def link lexPatTagZone lexPatTag + hi def link lexSep Delimiter + hi def link lexSlashQuote lexPat + hi def link lexSlashBrace lexPat + hi def link lexStartState lexPatTag + hi def link lexStartStateCmd Special +endif + +let b:current_syntax = "lex" + +" vim:ts=8 |