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60 lines
930 B
Plaintext
60 lines
930 B
Plaintext
%{
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/*
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* lang.l - BOOM syntax
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*
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* Copyright 2012 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdarg.h>
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#include <stdlib.h>
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#include "util.h"
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#include "param.h"
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#include "y.tab.h"
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static int lineno = 1;
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%}
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%%
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[-_A-Za-z0-9()+./]+ { yylval.s = unique(yytext);
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return WORD; }
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"<=" return TOK_LE;
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">=" return TOK_GE;
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[ \t] ;
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\n lineno++;
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^#[^n]*\n lineno++;
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. return *yytext;
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%%
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void yyerrorf(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "%d: ", lineno);
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vfprintf(stderr, fmt, ap) ;
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fprintf(stderr, "\n");
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va_end(ap);
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exit(1);
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}
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void yyerror(const char *s)
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{
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fprintf(stderr, "%d: %s\n", lineno, s);
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exit(1);
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}
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