C code generation bug in bison 1.29

[tstevenson]

I found a bug where the generated C code from Bison adds a slash to a comment,
causing the C compiler to fail.

I am using GNU Bison 1.29

I am running both on DG/UX version 4.20 (update 7) and Sun Solaris version 8.
The bug appears on both platforms.

The following Bison grammar:

%{
%}

%union {
     char *string;            /*a comment*/
     int cmd;
}

%token <string> QSTRING, STRING, EOT

%%

root
     : QSTRING  EOT
          {printf("hello world"); }
     | STRING EOT
          {printf("syntax error"}
     ;

%%


generates the following code when converting the %union operation to the
corresponding C typedef:
 (I show only the snippet that is bad)


#line 4 "yacc.y"
typedef union {
     char *string;            //*a comment*/
     int cmd;
} YYSTYPE;
#include <stdio.h>


Please note the '//' on the comment.  I realize that most modern C compilers
allow a // as a comment, however, not all do,
and this is an invalid C construct.


I've attached the complete source grammar file and the output from Bison.
I generate the code running Bison without any command line arguments.

thank you.  Bison is a great tool.

Todd Stevenson
address@hidden


(See attached file: yacc.y)(See attached file: yacc.tab.c)

yacc.y
Description: Binary data

yacc.tab.c
Description: Binary data