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