Re: [Boost-users] [mpl] at_c type compiler error

From: Vinzenz 'evilissimo' Feenstra (evilissimo_at_[hidden])
Date: 2007-10-18 10:16:07

Vinzenz 'evilissimo' Feenstra schrieb:
> Chris Weed schrieb:
>> Hi,
>> I can't figure out why the following code generates a compile error
>> with gcc 3.4:
> Hi,
> 
> shouldn't it be:
> 
>   template<typename E,typename T>
>   typename boost::tuples::element<typename 
> boost::mpl::at_c<E,0>::type::value,T>::type
>   foo(E e,T t)
>   {
>     return t.get<0>();
>   }
> 
> Regards,
> Vinzenz
Nevermind this wasn't the problem. Here's a working one ;)

#include <boost/mpl/vector_c.hpp>
#include <boost/mpl/at.hpp>
#include <boost/tuple/tuple.hpp>

template<typename E,typename T>
typename boost::tuples::element<
          boost::mpl::at_c<E,0>::type::value , T
          >::type
foo(E e, T t)
{
   return boost::get<0>(t);
}

int main()
{
   typedef boost::mpl::vector_c<int,0,1> elements;
   boost::tuple<int> t(1);
   foo(elements(),t);
}