blob: 164c04b03e6d836eaa615b20ddae471f1fac37c5 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/* Expression calculator */
%{
#include "parser.tab.h"
#include <stdlib.h>
int current_line = 0;
#define YY_NO_UNISTD_H
%}
digit [0-9]
number [1-9]{digit}*
fnumber {digit}+"."{digit}*
%%
{number}|{fnumber} { yylval = atof(yytext); return NUMBER; }
"+" { return PLUS; }
"-" { return MINUS; }
"*" { return MULT; }
"/" { return DIV; }
"(" { return '('; }
")" { return ')'; }
[ \t] { }
\n { ++current_line; }
%%
int yywrap()
{
return 1;
}
|
