variant as a fusion sequence

[SVN r36014]
This commit is contained in:
Dan Marsden
2006-11-12 23:07:18 +00:00
parent 0faf16666f
commit 2a652e5424
7 changed files with 267 additions and 0 deletions

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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
Use, modification and distribution is subject to 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_VARIANT_BEGIN_IMPL_12112006_2137)
#define BOOST_FUSION_VARIANT_BEGIN_IMPL_12112006_2137
#include <boost/mpl/begin.hpp>
namespace boost { namespace fusion {
struct variant_tag;
template<typename Seq, typename Iterator>
struct variant_iterator;
namespace extension
{
template<typename T>
struct begin_impl;
template <>
struct begin_impl<variant_tag>
{
template <typename Seq>
struct apply
{
typedef variant_iterator<
Seq,
typename mpl::begin<typename Seq::types>::type> type;
static type
call(Seq& v)
{
return type(v);
}
};
};
}
}}
#endif

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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
Use, modification and distribution is subject to 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_VARIANT_END_IMPL_12112006_2137)
#define BOOST_FUSION_VARIANT_END_IMPL_12112006_2137
#include <boost/mpl/end.hpp>
namespace boost { namespace fusion {
struct variant_tag;
template<typename Seq, typename Iterator>
struct variant_iterator;
namespace extension
{
template<typename T>
struct end_impl;
template <>
struct end_impl<variant_tag>
{
template <typename Seq>
struct apply
{
typedef variant_iterator<
Seq,
typename mpl::end<typename Seq::types>::type> type;
static type
call(Seq& v)
{
return type(v);
}
};
};
}
}}
#endif

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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
Use, modification and distribution is subject to 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_VARIANT_SIZE_IMPL_12112006_2115)
#define BOOST_FUSION_VARIANT_SIZE_IMPL_12112006_2115
#include <boost/mpl/size.hpp>
namespace boost { namespace fusion {
struct variant_tag;
namespace extension
{
template<typename T>
struct size_impl;
template<>
struct size_impl<variant_tag>
{
template<typename Sequence>
struct apply : mpl::size<typename Sequence::types>
{};
};
}
}}
#endif