Re: %union with STL

[Hans Aberg]

On 22 May 2009, at 20:11, Paritosh Aggarwal wrote:

> /*JIT PARSER BISON FILE*/
>
> %{
> #include<map>
> #include "heading.h"
>
> using namespace std;
>
> int yyerror(char *s);
> int yylex(void);
> %}
>
> %union
> {
>    pair<const string,int>* it;
>    int val;
> }
>
> ................
>
> compiling this gives the following error: jitparser.y:15: error: ISO  
> C++
> forbids declaration of ‘pair’ with no type
> jitparser.y:15: error: expected ‘;’ before ‘<’ token

In the above, make sure the header for std::pair is included -  
impossible to see from your example. Perhaps the class used as a  
pointer needs to be instantiated before - try it without the 'union'.  
Sometimes "using namespace std" may cause problems - try without it.  
And you do not mention which Bison version you are using - in case it  
is a know bug fixed. Just some inputs.

  Hans