forked from boostorg/fusion
2114bfca6c
Note 1: Forwarding functions are specified as a C++14 constexpr since std::forward is not a constexpr within C++11. Note 2: Though I'm not sure why it doesn't compile, some declarations are specified as a C++14 constexpr or non-constexpr. Note 3: Boost.Tuple adaptation and TR1-based tuple implementations are not constexpr.
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
/*=============================================================================
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Copyright (c) 2009 Christopher Schmidt
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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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#ifndef BOOST_FUSION_CONTAINER_SET_DETAIL_DEREF_IMPL_HPP
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#define BOOST_FUSION_CONTAINER_SET_DETAIL_DEREF_IMPL_HPP
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/sequence/intrinsic/at.hpp>
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#include <boost/type_traits/is_const.hpp>
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namespace boost { namespace fusion { namespace extension
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{
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template <typename>
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struct deref_impl;
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template <>
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struct deref_impl<set_iterator_tag>
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{
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template <typename It>
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struct apply
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{
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typedef typename
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result_of::at<
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typename mpl::if_<
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is_const<typename It::seq_type>
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, typename It::seq_type::storage_type const
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, typename It::seq_type::storage_type
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>::type
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, typename It::index
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>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(It const& it)
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{
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return ::boost::fusion::at<typename It::index>(it.seq->get_data());
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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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