92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
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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_COPY_02162011_2308)
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#define FUSION_COPY_02162011_2308
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/sequence/intrinsic/begin.hpp>
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#include <boost/fusion/sequence/intrinsic/end.hpp>
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#include <boost/fusion/sequence/intrinsic/size.hpp>
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#include <boost/fusion/sequence/comparison/detail/equal_to.hpp>
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#include <boost/fusion/support/is_sequence.hpp>
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#include <boost/config.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/mpl/and.hpp>
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#if defined (BOOST_MSVC)
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# pragma warning(push)
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# pragma warning (disable: 4100) // unreferenced formal parameter
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#endif
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namespace boost { namespace fusion
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{
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namespace detail
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{
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template <typename Seq1, typename Seq2>
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struct sequence_copy
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{
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typedef typename result_of::end<Seq1>::type end1_type;
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typedef typename result_of::end<Seq2>::type end2_type;
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template <typename I1, typename I2>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void
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call(I1 const&, I2 const&, mpl::true_)
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{
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}
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template <typename I1, typename I2>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void
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call(I1 const& src, I2 const& dest, mpl::false_)
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{
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*dest = *src;
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call(fusion::next(src), fusion::next(dest));
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}
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template <typename I1, typename I2>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void
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call(I1 const& src, I2 const& dest)
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{
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typename result_of::equal_to<I1, end1_type>::type eq;
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return call(src, dest, eq);
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}
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};
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}
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namespace result_of
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{
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template <typename Seq1, typename Seq2>
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struct copy
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: enable_if<mpl::and_<
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traits::is_sequence<Seq1>,
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traits::is_sequence<Seq2>
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> > {};
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}
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template <typename Seq1, typename Seq2>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline typename result_of::copy<Seq1 const, Seq2>::type
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copy(Seq1 const& src, Seq2& dest)
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{
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BOOST_STATIC_ASSERT(
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result_of::size<Seq1>::value <= result_of::size<Seq2>::value);
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detail::sequence_copy<
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Seq1 const, Seq2>::
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call(fusion::begin(src), fusion::begin(dest));
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}
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}}
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#if defined (BOOST_MSVC)
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# pragma warning(pop)
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#endif
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#endif
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