ceph/src/boost/libs/fusion/include/boost/fusion/tuple/tuple.hpp

   1 /*=============================================================================
   2     Copyright (c) 2014-2015 Kohei Takahashi
   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 #ifndef FUSION_TUPLE_14122014_0102
   8 #define FUSION_TUPLE_14122014_0102
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/tuple/tuple_fwd.hpp>
  12
  13 ///////////////////////////////////////////////////////////////////////////////
  14 // With no variadics, we will use the C++03 version
  15 ///////////////////////////////////////////////////////////////////////////////
  16 #if !defined(BOOST_FUSION_HAS_VARIADIC_TUPLE)
  17 # include <boost/fusion/tuple/detail/tuple.hpp>
  18 #else
  19
  20 ///////////////////////////////////////////////////////////////////////////////
  21 // C++11 interface
  22 ///////////////////////////////////////////////////////////////////////////////
  23 #include <boost/core/enable_if.hpp>
  24 #include <boost/fusion/container/vector/vector.hpp>
  25 #include <boost/fusion/sequence/intrinsic/size.hpp>
  26 #include <boost/fusion/sequence/intrinsic/value_at.hpp>
  27 #include <boost/fusion/sequence/intrinsic/at.hpp>
  28 #include <boost/fusion/sequence/comparison.hpp>
  29 #include <boost/fusion/sequence/io.hpp>
  30 #include <boost/fusion/support/detail/and.hpp>
  31 #include <boost/type_traits/is_convertible.hpp>
  32 #include <utility>
  33
  34 namespace boost { namespace fusion
  35 {
  36     template <typename ...T>
  37     struct tuple : vector<T...>
  38     {
  39         typedef vector<T...> base_type;
  40
  41         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  42         tuple()
  43             : base_type() {}
  44
  45         template <
  46             typename ...U
  47           , typename = typename boost::enable_if_c<
  48                 sizeof...(U) >= sizeof...(T)
  49             >::type
  50         >
  51         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  52         tuple(tuple<U...> const& other)
  53             : base_type(other) {}
  54
  55         template <
  56             typename ...U
  57           , typename = typename boost::enable_if_c<
  58                 sizeof...(U) >= sizeof...(T)
  59             >::type
  60         >
  61         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  62         tuple(tuple<U...>&& other)
  63             : base_type(std::move(other)) {}
  64
  65         template <
  66             typename ...U
  67           , typename = typename boost::enable_if_c<(
  68                 fusion::detail::and_<is_convertible<U, T>...>::value &&
  69                 sizeof...(U) >= 1
  70             )>::type
  71         >
  72         /*BOOST_CONSTEXPR*/ BOOST_FUSION_GPU_ENABLED
  73         explicit
  74         tuple(U&&... args)
  75             : base_type(std::forward<U>(args)...) {}
  76
  77         template<typename U1, typename U2>
  78         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  79         tuple(std::pair<U1, U2> const& other)
  80             : base_type(other.first, other.second) {}
  81
  82         template<typename U1, typename U2>
  83         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  84         tuple(std::pair<U1, U2>&& other)
  85             : base_type(std::move(other.first), std::move(other.second)) {}
  86
  87         template<typename U>
  88         BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  89         tuple& operator=(U&& rhs)
  90         {
  91             base_type::operator=(std::forward<U>(rhs));
  92             return *this;
  93         }
  94     };
  95
  96     template <typename Tuple>
  97     struct tuple_size : result_of::size<Tuple> {};
  98
  99     template <int N, typename Tuple>
 100     struct tuple_element : result_of::value_at_c<Tuple, N> {};
 101
 102     template <int N, typename Tuple>
 103     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
 104     inline typename result_of::at_c<Tuple, N>::type
 105     get(Tuple& tup)
 106     {
 107         return at_c<N>(tup);
 108     }
 109
 110     template <int N, typename Tuple>
 111     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
 112     inline typename result_of::at_c<Tuple const, N>::type
 113     get(Tuple const& tup)
 114     {
 115         return at_c<N>(tup);
 116     }
 117 }}
 118
 119 #endif
 120 #endif
 121