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/*=============================================================================
Copyright (c) 2011 Eric Niebler
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(BOOST_FUSION_SINGLE_VIEW_AT_IMPL_JUL_07_2011_1348PM)
#define BOOST_FUSION_SINGLE_VIEW_AT_IMPL_JUL_07_2011_1348PM
#include <boost/mpl/int.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/equal_to.hpp>
namespace boost { namespace fusion
{
struct single_view_tag;
namespace extension
{
template<typename Tag>
struct at_impl;
template<>
struct at_impl<single_view_tag>
{
template<typename Sequence, typename N>
struct apply
{
BOOST_MPL_ASSERT((mpl::equal_to<N, mpl::int_<0> >));
typedef typename Sequence::value_type type;
static type
call(Sequence& seq)
{
return seq.val;
}
};
};
}
}}
#endif
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