68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
|
/*=============================================================================
|
||
|
|
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/fusion/support/config.hpp>
|
||
|
|
#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
|