1{
2#include "stdio.h"
3#include "string.h"
4#include "stdlib.h"
5char *xdup(char *s, char *e) {
6  char *ss = malloc( e - s + 2 );
7  memcpy(ss, s, e-s);
8  ss[e-s] = 0;
9  return ss;
10}
11}
12top: A ( B C { printf("%s\n", xdup($n.start_loc.s, $n.end)); } ) D;
13A: 'A';
14B: 'B';
15C: 'C';
16D: 'D';
17whitespace: "[\t\n ]";
18