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%{
#include <stdio.h>
#define BEGIN_T 1
#define END_T 2
#define NUM_T 3
#define VAR_T 4
%}
VAR [a-zA-Z][a-zA-Z\_\-0-9]*
TAL [0-9]+
%%
begin {printf("Found a BEGIN\n"); return BEGIN_T;}
end {printf("Found a END\n"); return END_T;}
{VAR} {printf("Found a variable %s\n", yytext); return VAR_T;}
{TAL} {printf("Found a number %d\n", strtol(yytext, NULL, 10)); return NUM_T;}
%%
int main(void) {
for(;;) {
int t = yylex();
printf("yylex: %d\n", t);
if( t == END_T ) {
break;
}
}
return 0;
}
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