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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | ==============================================================================*/ | |
7 | #if !defined(FUSION_COPY_02162011_2308) | |
8 | #define FUSION_COPY_02162011_2308 | |
9 | ||
10 | #include <boost/fusion/support/config.hpp> | |
11 | #include <boost/fusion/sequence/intrinsic/begin.hpp> | |
12 | #include <boost/fusion/sequence/intrinsic/end.hpp> | |
13 | #include <boost/fusion/sequence/intrinsic/size.hpp> | |
14 | #include <boost/fusion/sequence/comparison/detail/equal_to.hpp> | |
15 | #include <boost/fusion/support/is_sequence.hpp> | |
16 | #include <boost/config.hpp> | |
17 | #include <boost/static_assert.hpp> | |
18 | #include <boost/utility/enable_if.hpp> | |
19 | #include <boost/mpl/and.hpp> | |
20 | ||
21 | #if defined (BOOST_MSVC) | |
22 | # pragma warning(push) | |
23 | # pragma warning (disable: 4100) // unreferenced formal parameter | |
24 | #endif | |
25 | ||
26 | namespace boost { namespace fusion | |
27 | { | |
28 | namespace detail | |
29 | { | |
30 | template <typename Seq1, typename Seq2> | |
31 | struct sequence_copy | |
32 | { | |
33 | typedef typename result_of::end<Seq1>::type end1_type; | |
34 | typedef typename result_of::end<Seq2>::type end2_type; | |
35 | ||
36 | template <typename I1, typename I2> | |
37 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
38 | static void | |
39 | call(I1 const&, I2 const&, mpl::true_) | |
40 | { | |
41 | } | |
42 | ||
43 | template <typename I1, typename I2> | |
44 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
45 | static void | |
46 | call(I1 const& src, I2 const& dest, mpl::false_) | |
47 | { | |
48 | *dest = *src; | |
49 | call(fusion::next(src), fusion::next(dest)); | |
50 | } | |
51 | ||
52 | template <typename I1, typename I2> | |
53 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
54 | static void | |
55 | call(I1 const& src, I2 const& dest) | |
56 | { | |
57 | typename result_of::equal_to<I1, end1_type>::type eq; | |
58 | return call(src, dest, eq); | |
59 | } | |
60 | }; | |
61 | } | |
62 | ||
63 | namespace result_of | |
64 | { | |
65 | template <typename Seq1, typename Seq2> | |
66 | struct copy | |
67 | : enable_if<mpl::and_< | |
68 | traits::is_sequence<Seq1>, | |
69 | traits::is_sequence<Seq2> | |
70 | > > {}; | |
71 | } | |
72 | ||
73 | template <typename Seq1, typename Seq2> | |
74 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
75 | inline typename result_of::copy<Seq1 const, Seq2>::type | |
76 | copy(Seq1 const& src, Seq2& dest) | |
77 | { | |
78 | BOOST_STATIC_ASSERT( | |
79 | result_of::size<Seq1>::value <= result_of::size<Seq2>::value); | |
80 | ||
81 | detail::sequence_copy< | |
82 | Seq1 const, Seq2>:: | |
83 | call(fusion::begin(src), fusion::begin(dest)); | |
84 | } | |
85 | }} | |
86 | ||
87 | #if defined (BOOST_MSVC) | |
88 | # pragma warning(pop) | |
89 | #endif | |
90 | ||
91 | #endif |