77 lines
1.7 KiB
Plaintext
77 lines
1.7 KiB
Plaintext
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%{
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/****************************************************************************
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lexer.l
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ParserWizard generated Lex file.
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Date: 07 December 2000
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****************************************************************************/
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#include "parser.h"
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#include "var.h"
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#include <stdlib.h>
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%}
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/////////////////////////////////////////////////////////////////////////////
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// declarations section
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// lexical analyser name
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%name mylexer
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// class definition
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{
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// place any extra class members here
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}
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// constructor
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{
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// place any extra initialisation code here
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}
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// place any declarations here
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%%
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/////////////////////////////////////////////////////////////////////////////
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// rules section
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%{
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// extract yylval for use later on in actions
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YYSTYPE& yylval = *(YYSTYPE*)yyparserptr->yylvalptr;
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%}
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// place your Lex rules here
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^[ \t]*#.* {/*preprocess(yytext);*/}
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//# {yyerror("# commands must be at start of line!");}
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stop {return STOP;}
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if {return IF;}
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else {return ELSE;}
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pause {return PAUSE;}
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print {return PRINT;}
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= {return ASSIGN;}
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== {return EQUAL;}
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!= {return NOTEQUAL;}
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\+ {return PLUS;}
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; {return END_STMT;}
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\( {return OPEN_PAR;}
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\) {return CLOSE_PAR;}
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\{ {return BEGIN_CS;}
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\} {return END_CS;}
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\$[a-zA-Z_][a-zA-Z_0-9]* {yylval.variableIdx=lookupVarName(yytext+1);return VARIABLE;}
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\/\/.* {}
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[0-9]+ {yylval.value=atoi(yytext);return VALUE;}
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[ \t]+ {}
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\n {/*s_linesProcessed++;*/}
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. {printf("?\n");/*printf("line:%d\n",yylineno);printf("-%s-\n",yytext);yyerror("Unexpected character in source");*/}
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%%
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/////////////////////////////////////////////////////////////////////////////
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// programs section
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