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added struct wrapping facilities to make it very easy to make any struct a conforming fusion sequence

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[SVN r37328]
This commit is contained in:
Joel de Guzman
2007-04-02 03:31:13 +00:00
parent ddf9cb743a
commit 6002bc9bb4
13 changed files with 214 additions and 172 deletions
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65
include/boost/fusion/sequence/adapted/std_pair.hpp
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@ -2,20 +2,65 @@
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
Distributed under the Boost Software License, Version 1.0. (See accompanying
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_STD_PAIR_24122005_1744)
#define BOOST_FUSION_STD_PAIR_24122005_1744
#include <boost/fusion/sequence/adapted/std_pair/tag_of.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/is_view_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/is_sequence_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/category_of_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/begin_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/end_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/size_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/at_impl.hpp>
#include <boost/fusion/sequence/adapted/std_pair/detail/value_at_impl.hpp>
#include <boost/fusion/support/tag_of_fwd.hpp>
#include <boost/fusion/sequence/adapted/struct.hpp>
#include <boost/mpl/int.hpp>
#include <utility>
namespace boost { namespace fusion
{
struct struct_tag;
namespace traits
{
template <typename T1, typename T2>
struct tag_of<std::pair<T1, T2> >
{
typedef struct_tag type;
};
}
namespace extension
{
template <typename Struct, int N>
struct struct_member;
template <typename Struct>
struct struct_size;
template <typename T1, typename T2>
struct struct_member<std::pair<T1, T2>, 0>
{
typedef T1 type;
static type& call(std::pair<T1, T2>& pair)
{
return pair.first;
}
};
template <typename T1, typename T2>
struct struct_member<std::pair<T1, T2>, 1>
{
typedef T2 type;
static type& call(std::pair<T1, T2>& pair)
{
return pair.second;
}
};
template <typename T1, typename T2>
struct struct_size<std::pair<T1, T2> > : mpl::int_<2>
{
};
}
}}
#endif