err_syntax25.y revision 268899 
1%{
2int yylex(void);
3static void yyerror(const char *);
4%}
5
6%union {
7	int ival;
8	double dval;
9}
10
11%union {
12	int ival2;
13	double dval2;
14}
15
16%start expr
17%type <tag2> expr
18
19%token NUMBER
20
21%%
22
23expr  :  '(' recur ')'
24      ;
25
26recur :  NUMBER
27	{ $$ = 1; }
28      ;
29
30%%
31
32#include <stdio.h>
33
34int
35main(void)
36{
37    printf("yyparse() = %d\n", yyparse());
38    return 0;
39}
40
41int
42yylex(void)
43{
44    return -1;
45}
46
47static void
48yyerror(const char* s)
49{
50    printf("%s\n", s);
51}
52