Re: [boost] [mpl] metafunctions for stl templates

From: Sascha Krissler (boost-dev_at_[hidden])
Date: 2006-11-11 21:33:04

On Sat, Nov 11, 2006 at 06:16:26PM -0800, Eric Niebler wrote:
> Sascha Krissler wrote:
> > What i would like is:
> > 
> > template <typename T, typename Container>
> > struct Foo {
> > 	typedef typename mpl::apply<Container, T>::type foo;
> > };
> > 
> > and instantiate it with:
> > 
> > Foo<int, mpl::stl_foo::vector<mpl::placeholder::_1> >
> > 
> > For that i need
> > 
> > namespace boost::mpl::stl_foo {
> > 	template <typename T, typename Alloc>
> > 	struct vector {
> > 		typedef std::vector<T, Alloc> type
> > 	};
> > }
> > 
> > so i can curry containers as i wish.
> > 
> > just an idea
> 
> 
> Try this instead:
> 
> using mpl::_;
> Foo< int, std::vector<_> >
> 
> :-)
> 
std::vector is not a metafunction, it has no ::type