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/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
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(FUSION_IS_VIEW_03202006_0015)
#define FUSION_IS_VIEW_03202006_0015
#include <boost/mpl/bool.hpp>
#include <boost/fusion/support/detail/is_view.hpp>
#include <boost/fusion/support/tag_of.hpp>
namespace boost { namespace fusion
{
// Special tags:
struct sequence_facade_tag;
struct boost_tuple_tag; // boost::tuples::tuple tag
struct boost_array_tag; // boost::array tag
struct mpl_sequence_tag; // mpl sequence tag
struct std_pair_tag; // std::pair tag
namespace extension
{
template<typename Tag>
struct is_view_impl
{
template <typename T>
struct apply
: detail::fusion_is_view<T>
{};
};
template <>
struct is_view_impl<sequence_facade_tag>
{
template <typename Sequence>
struct apply : Sequence::is_view {};
};
template <>
struct is_view_impl<boost_tuple_tag>;
template <>
struct is_view_impl<boost_array_tag>;
template <>
struct is_view_impl<mpl_sequence_tag>;
template <>
struct is_view_impl<std_pair_tag>;
}
namespace traits
{
template <typename T>
struct is_view :
mpl::bool_<
(bool)extension::is_view_impl<typename fusion::detail::tag_of<T>::type>::
template apply<T>::type::value
>
{};
}
}}
#endif
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