/*============================================================================= | |
Copyright (c) 2001-2006 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_SEQUENCE_05052005_1002) | |
#define FUSION_IS_SEQUENCE_05052005_1002 | |
#include <boost/fusion/support/sequence_base.hpp> | |
#include <boost/fusion/support/tag_of.hpp> | |
#include <boost/mpl/is_sequence.hpp> | |
#include <boost/mpl/or.hpp> | |
#include <boost/mpl/bool.hpp> | |
#include <boost/type_traits/is_convertible.hpp> | |
#include <boost/type_traits/is_same.hpp> | |
namespace boost { namespace fusion | |
{ | |
// Special tags: | |
struct non_fusion_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 T> | |
struct is_sequence_impl | |
{ | |
template <typename Sequence> | |
struct apply | |
: is_convertible<Sequence, detail::from_sequence_convertible_type> | |
{}; | |
}; | |
template <> | |
struct is_sequence_impl<non_fusion_tag> | |
{ | |
template <typename T> | |
struct apply : mpl::false_ {}; | |
}; | |
template <> | |
struct is_sequence_impl<boost_tuple_tag>; | |
template <> | |
struct is_sequence_impl<boost_array_tag>; | |
template <> | |
struct is_sequence_impl<mpl_sequence_tag>; | |
template <> | |
struct is_sequence_impl<std_pair_tag>; | |
} | |
namespace traits | |
{ | |
template <typename T> | |
struct is_sequence | |
: extension::is_sequence_impl< | |
typename fusion::detail::tag_of<T>::type | |
>::template apply<T> | |
{}; | |
template <typename Sequence, typename Enable = void> | |
struct is_native_fusion_sequence | |
: is_convertible<Sequence, detail::from_sequence_convertible_type> | |
{}; | |
} | |
}} | |
#endif |