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79 lines
2.3 KiB
79 lines
2.3 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2018 Kohei Takahashi
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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_DEREF_IMPL_07162005_1026)
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#define FUSION_DEREF_IMPL_07162005_1026
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/utility/result_of.hpp>
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namespace boost { namespace fusion
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{
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struct transform_view_iterator_tag;
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struct transform_view_iterator2_tag;
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namespace extension
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{
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template <typename Tag>
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struct deref_impl;
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// Unary Version
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template <>
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struct deref_impl<transform_view_iterator_tag>
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{
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template <typename Iterator>
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struct apply
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{
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typedef typename
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result_of::deref<typename Iterator::first_type>::type
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value_type;
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typedef typename Iterator::transform_type F;
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typedef typename boost::result_of<F(value_type)>::type type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& i)
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{
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return i.f(*i.first);
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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 deref_impl<transform_view_iterator2_tag>
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{
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template <typename Iterator>
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struct apply
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{
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typedef typename
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result_of::deref<typename Iterator::first1_type>::type
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value1_type;
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typedef typename
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result_of::deref<typename Iterator::first2_type>::type
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value2_type;
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typedef typename Iterator::transform_type F;
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typedef typename boost::result_of<F(value1_type, value2_type)>::type type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& i)
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{
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return i.f(*i.first1, *i.first2);
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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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