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lithp.lex
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/
lithp.lex
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%{
/* This file is part of Lithp.
Lithp is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Lithp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with lithp; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "y.tab.h"
#include "cons.h"
#include <stdlib.h>
%}
DIGIT [0-9]
SYMBOL [\!\=\-+*/a-zA-Z][a-zA-Z0-9]*
%%
[ \t\n]* {}
"(" { return O_PARENTH; }
")" { return C_PARENTH; }
"." { return DOT; }
"," { return COMMA; }
"'" { return QUOTE; }
"`" { return BACKQUOTE; }
-?{DIGIT}*"."{DIGIT}+ { yylval.value = atof(yytext); return NUMBER; }
-?{DIGIT}+ { yylval.value = atof(yytext); return NUMBER; }
{SYMBOL}+ { yylval.text = (char*)strdup(yytext); return SYMBOL; }
%%
int yywrap() { return 1; }