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72 lines
2.2 KiB
72 lines
2.2 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(FUSION_BEGIN_IMPL_07162005_1031)
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#define FUSION_BEGIN_IMPL_07162005_1031
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/view/transform_view/transform_view_fwd.hpp>
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namespace boost { namespace fusion
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{
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template <typename First, typename F>
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struct transform_view_iterator;
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template <typename First1, typename First2, typename F>
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struct transform_view_iterator2;
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namespace extension
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{
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template <typename Tag>
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struct begin_impl;
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// Unary Version
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template <>
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struct begin_impl<transform_view_tag>
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{
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template <typename Sequence>
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struct apply
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{
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typedef typename Sequence::first_type first_type;
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typedef typename Sequence::transform_type transform_type;
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typedef transform_view_iterator<first_type, transform_type> type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Sequence& s)
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{
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return type(s.first(), s.f);
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}
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};
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};
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// Binary Version
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template <>
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struct begin_impl<transform_view2_tag>
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{
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template <typename Sequence>
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struct apply
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{
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typedef typename Sequence::first1_type first1_type;
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typedef typename Sequence::first2_type first2_type;
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typedef typename Sequence::transform_type transform_type;
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typedef transform_view_iterator2<first1_type, first2_type, transform_type> type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Sequence& s)
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{
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return type(s.first1(), s.first2(), s.f);
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}
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};
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};
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}
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}}
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#endif
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