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added at impl for transform view random access

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[SVN r35782]
This commit is contained in:
Dan Marsden
2006-10-29 21:16:00 +00:00
parent f6ebceef8a
commit eca5a201e9
2 changed files with 68 additions and 0 deletions
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64
include/boost/fusion/sequence/view/transform_view/detail/at_impl.hpp Normal file
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@ -0,0 +1,64 @@
/*=============================================================================
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_AT_IMPL_20061029_1946)
#define BOOST_FUSION_AT_IMPL_20061029_1946
#include <boost/mpl/apply.hpp>
#include <boost/fusion/sequence/view/transform_view/detail/apply_transform_result.hpp>
#include <boost/fusion/sequence/intrinsic/at.hpp>
namespace boost { namespace fusion {
struct transform_view_tag;
struct transform_view2_tag;
namespace extension
{
template<typename Tag>
struct at_impl;
template<>
struct at_impl<transform_view_tag>
{
template<typename Seq, typename N>
struct apply
{
typedef typename Seq::transform_type F;
typedef detail::apply_transform_result<F> transform_type;
typedef typename boost::fusion::result_of::at<typename Seq::sequence_type, N>::type value_type;
typedef typename mpl::apply<transform_type, value_type>::type type;
static type call(Seq& seq)
{
return seq.f(boost::fusion::at<N>(seq.seq));
}
};
};
template<>
struct at_impl<transform_view2_tag>
{
template<typename Seq, typename N>
struct apply
{
typedef typename Seq::transform_type F;
typedef detail::apply_transform_result<F> transform_type;
typedef typename boost::fusion::result_of::at<typename Seq::sequence1_type, N>::type value1_type;
typedef typename boost::fusion::result_of::at<typename Seq::sequence2_type, N>::type value2_type;
typedef typename mpl::apply<transform_type, value1_type, value2_type>::type type;
static type call(Seq& seq)
{
return seq.f(boost::fusion::at<N>(seq.seq1), boost::fusion::at<N>(seq.seq2));
}
};
};
}
}}
#endif

4
include/boost/fusion/sequence/view/transform_view/transform_view.hpp
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@ -16,6 +16,7 @@
#include <boost/fusion/sequence/view/transform_view/transform_view_fwd.hpp>
#include <boost/fusion/sequence/view/transform_view/detail/begin_impl.hpp>
#include <boost/fusion/sequence/view/transform_view/detail/end_impl.hpp>
#include <boost/fusion/sequence/view/transform_view/detail/at_impl.hpp>
#include <boost/fusion/sequence/intrinsic/size.hpp>
#include <boost/fusion/support/sequence_base.hpp>
#include <boost/fusion/sequence/intrinsic/begin.hpp>
@ -46,6 +47,8 @@ namespace boost { namespace fusion
typedef typename result_of::end<Sequence1>::type last1_type;
typedef typename result_of::end<Sequence2>::type last2_type;
typedef typename result_of::size<Sequence1>::type size;
typedef Sequence1 sequence1_type;
typedef Sequence2 sequence2_type;
typedef F transform_type;
transform_view(Sequence1& seq1, Sequence2& seq2, F const& binop)
@ -76,6 +79,7 @@ namespace boost { namespace fusion
typedef typename result_of::begin<Sequence>::type first_type;
typedef typename result_of::end<Sequence>::type last_type;
typedef typename result_of::size<Sequence>::type size;
typedef Sequence sequence_type;
typedef F transform_type;
transform_view(Sequence& seq, F const& f)