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1 /*=============================================================================
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2 Copyright (c) 2001-2013 Joel de Guzman
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3
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4 Distributed under the Boost Software License, Version 1.0. (See accompanying
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5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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6 ==============================================================================*/
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7 #if !defined(FUSION_MOVE_01192013_2225)
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8 #define FUSION_MOVE_01192013_2225
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9
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10 #include <boost/fusion/sequence/intrinsic/begin.hpp>
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11 #include <boost/fusion/sequence/intrinsic/end.hpp>
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12 #include <boost/fusion/sequence/intrinsic/size.hpp>
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13 #include <boost/fusion/sequence/comparison/detail/equal_to.hpp>
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14 #include <boost/fusion/support/is_sequence.hpp>
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15 #include <boost/config.hpp>
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16 #include <boost/static_assert.hpp>
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17 #include <boost/utility/enable_if.hpp>
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18 #include <boost/type_traits/ice.hpp>
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19
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20 #if defined (BOOST_MSVC)
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21 # pragma warning(push)
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22 # pragma warning (disable: 4100) // unreferenced formal parameter
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23 #endif
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24
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25 namespace boost { namespace fusion
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26 {
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27 namespace detail
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28 {
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29 template <typename Seq1, typename Seq2>
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30 struct sequence_move
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31 {
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32 typedef typename result_of::end<Seq1>::type end1_type;
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33 typedef typename result_of::end<Seq2>::type end2_type;
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34
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35 template <typename I1, typename I2>
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36 static void
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37 call(I1 const&, I2 const&, mpl::true_)
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38 {
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39 }
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40
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41 template <typename I1, typename I2>
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42 static void
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43 call(I1 const& src, I2 const& dest, mpl::false_)
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44 {
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45 *dest = std::move(*src);
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46 call(fusion::next(src), fusion::next(dest));
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47 }
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48
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49 template <typename I1, typename I2>
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50 static void
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51 call(I1 const& src, I2 const& dest)
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52 {
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53 typename result_of::equal_to<I1, end1_type>::type eq;
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54 return call(src, dest, eq);
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55 }
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56 };
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57 }
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58
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59 template <typename Seq1, typename Seq2>
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60 inline
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61 typename
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62 enable_if_c<
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63 type_traits::ice_and<
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64 traits::is_sequence<Seq1>::value
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65 , traits::is_sequence<Seq2>::value
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66 >::value,
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67 void
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68 >::type
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69 move(Seq1&& src, Seq2& dest)
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70 {
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71 BOOST_STATIC_ASSERT(
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72 result_of::size<Seq1>::value <= result_of::size<Seq2>::value);
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73
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74 detail::sequence_move<
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75 Seq1, Seq2>::
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76 call(fusion::begin(src), fusion::begin(dest));
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77 }
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78 }}
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79
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80 #if defined (BOOST_MSVC)
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81 # pragma warning(pop)
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82 #endif
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83
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84 #endif
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