mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-24 22:03:21 +03:00
99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
/*=============================================================================
|
|
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_BEGIN_04052005_1132)
|
|
#define FUSION_BEGIN_04052005_1132
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/utility/enable_if.hpp>
|
|
#include <boost/mpl/empty_base.hpp>
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/fusion/sequence/intrinsic_fwd.hpp>
|
|
#include <boost/fusion/support/tag_of.hpp>
|
|
#include <boost/fusion/support/is_sequence.hpp>
|
|
#include <boost/fusion/support/is_segmented.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/detail/segmented_begin.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
// Special tags:
|
|
struct sequence_facade_tag; // iterator 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 begin_impl
|
|
{
|
|
template <typename Sequence>
|
|
struct apply
|
|
: mpl::if_<
|
|
traits::is_segmented<Sequence>
|
|
, detail::segmented_begin<Sequence>
|
|
, mpl::empty_base
|
|
>::type
|
|
{};
|
|
};
|
|
|
|
template <>
|
|
struct begin_impl<sequence_facade_tag>
|
|
{
|
|
template <typename Sequence>
|
|
struct apply : Sequence::template begin<Sequence> {};
|
|
};
|
|
|
|
template <>
|
|
struct begin_impl<boost_tuple_tag>;
|
|
|
|
template <>
|
|
struct begin_impl<boost_array_tag>;
|
|
|
|
template <>
|
|
struct begin_impl<mpl_sequence_tag>;
|
|
|
|
template <>
|
|
struct begin_impl<std_pair_tag>;
|
|
}
|
|
|
|
namespace result_of
|
|
{
|
|
template <typename Sequence>
|
|
struct begin
|
|
: extension::begin_impl<typename detail::tag_of<Sequence>::type>::
|
|
template apply<Sequence>
|
|
{};
|
|
}
|
|
|
|
template <typename Sequence>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
inline typename
|
|
lazy_enable_if<
|
|
traits::is_sequence<Sequence>
|
|
, result_of::begin<Sequence>
|
|
>::type const
|
|
begin(Sequence& seq)
|
|
{
|
|
return result_of::begin<Sequence>::call(seq);
|
|
}
|
|
|
|
template <typename Sequence>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
inline typename
|
|
lazy_enable_if<
|
|
traits::is_sequence<Sequence>
|
|
, result_of::begin<Sequence const>
|
|
>::type const
|
|
begin(Sequence const& seq)
|
|
{
|
|
return result_of::begin<Sequence const>::call(seq);
|
|
}
|
|
}}
|
|
|
|
#endif
|