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Fusion: added nview and friends

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[SVN r56376]
This commit is contained in:
Hartmut Kaiser
2009-09-25 00:20:03 +00:00
parent b16d42a31b
commit 43645b3764
16 changed files with 721 additions and 0 deletions
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45
include/boost/fusion/view/nview/detail/at_impl.hpp Normal file
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/*=============================================================================
Copyright (c) 2009 Hartmut Kaiser
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_NVIEW_AT_IMPL_SEP_24_2009_0225PM)
#define BOOST_FUSION_NVIEW_AT_IMPL_SEP_24_2009_0225PM
#include <boost/fusion/sequence/intrinsic/at.hpp>
namespace boost { namespace fusion
{
struct nview_tag;
namespace extension
{
template<typename Tag>
struct at_impl;
template<>
struct at_impl<nview_tag>
{
template<typename Sequence, typename N>
struct apply
{
typedef typename Sequence::sequence_type sequence_type;
typedef typename Sequence::index_type index_type;
typedef typename result_of::at<index_type, N>::type index;
typedef typename result_of::at<sequence_type, index>::type type;
static type
call(Sequence& seq)
{
return fusion::at<index>(seq.seq);
}
};
};
}
}}
#endif