c2244 and namespace error.

Recently i did some compilation test that resulted in C2244 unable to
match function declaration and function definition.

example..

inside the hpp file.
namespace something {
template <typename T,
         template <typename ELEM, typename = std::allocator<ELEM> >
         class CONT

extern void select_sort(CONT<T>&, typename CONT<T>::iterator, const
typename CONT<T>::size_type&, const typename CONT<T>::size_type&);

}

inside the c file

template <typename T,
         template <typename ELEM, typename = std::allocator<ELEM> >
         class CONT

void Something::select_sort(CONT<T>& array, typename CONT<T>::iterator
Left,
                    const typename CONT<T>::size_type& Size, const
typename CONT<T>::size_type& Step)
{
   typedef typename CONT<T>::iterator iter;
   iter IEnd(boost::next(Left, (Size-1)*Step));
   iter JEnd(boost::next(Left, Size*Step));
   iter min;
   iter Last(array.end());
   BOOST_ASSERT(IEnd != Last);
   BOOST_ASSERT(JEnd != Last);
   for (iter i(Left); i < IEnd; std::advance(i, Step))
   {
       min = i;
       for (iter j(boost::next(i, Step)); j < JEnd; std::advance(j,
Step))
       {
           if (*j < *min)
              min = j;
       }
       std::iter_swap(i, min);
   }
}

take it out of namespace and i don't get the error.