Re: Iterator adapters and maps

From: Alisdair Meredith (yg-boost-users_at_[hidden])
Date: 2002-10-04 12:19:33

scleary_at_[hidden] wrote:
> 
> I think the problem is in the definition of Select2ndRef; if you use:
>   template<class pair_type>
>   struct Select2ndRef
>   {
>     typedef pair_type argument_type;
>     typedef typename pair_type::second_type result_type;
> 
>     result_type & operator()(pair_type & source) const
>     {
>       return source.second;
>     }
>   };
> then your code will compile.
> 
> This has to do with an unusual meaning of "result_type" for projection
> iterator adaptors.

Excellent, that seems to work fine.
I've renamed Select2ndRef as Project2nd for use in such cases in the
future  <g>

-- 
AlisdairM