projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*============================================================================= |
| 2 | Copyright (c) 2014 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 | #if !defined(BOOST_FUSION_BUILD_STD_TUPLE_05292014_0100) | |
| 8 | #define BOOST_FUSION_BUILD_STD_TUPLE_05292014_0100 | |
| 9 | ||
| 10 | #include <boost/fusion/support/config.hpp> | |
| 11 | #include <boost/fusion/support/detail/index_sequence.hpp> | |
| 12 | #include <boost/fusion/iterator/equal_to.hpp> | |
| 13 | #include <boost/fusion/iterator/next.hpp> | |
| 14 | #include <boost/fusion/iterator/value_of.hpp> | |
| 15 | #include <boost/fusion/iterator/deref.hpp> | |
| 16 | #include <tuple> | |
| 17 | #include <cstddef> | |
| 18 | ||
| 19 | namespace boost { namespace fusion { namespace detail | |
| 20 | { | |
| 21 | template <typename First, typename Last, | |
| 22 | bool is_empty = result_of::equal_to<First, Last>::value> | |
| 23 | struct build_std_tuple; | |
| 24 | ||
| 25 | template <typename First, typename Last> | |
| 26 | struct build_std_tuple<First, Last, true> | |
| 27 | { | |
| 28 | typedef std::tuple<> type; | |
| 29 | ||
| 30 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 31 | static type | |
| 32 | call(First const&, Last const&) | |
| 33 | { | |
| 34 | return type(); | |
| 35 | } | |
| 36 | }; | |
| 37 | ||
| 38 | template <typename T, typename Rest> | |
| 39 | struct push_front_std_tuple; | |
| 40 | ||
| 41 | template <typename T, typename ...Rest> | |
| 42 | struct push_front_std_tuple<T, std::tuple<Rest...> > | |
| 43 | { | |
| 44 | typedef std::tuple<T, Rest...> type; | |
| 45 | ||
| 46 | template <std::size_t ...I> | |
| 47 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 48 | static type | |
| 49 | indexed_call(T const& first, std::tuple<Rest...> const& rest, index_sequence<I...>) | |
| 50 | { | |
| 51 | return type(first, std::get<I>(rest)...); | |
| 52 | } | |
| 53 | ||
| 54 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 55 | static type | |
| 56 | call(T const& first, std::tuple<Rest...> const& rest) | |
| 57 | { | |
| 58 | typedef typename make_index_sequence<sizeof...(Rest)>::type gen; | |
| 59 | return indexed_call(first, rest, gen()); | |
| 60 | } | |
| 61 | }; | |
| 62 | ||
| 63 | template <typename First, typename Last> | |
| 64 | struct build_std_tuple<First, Last, false> | |
| 65 | { | |
| 66 | typedef | |
| 67 | build_std_tuple<typename result_of::next<First>::type, Last> | |
| 68 | next_build_std_tuple; | |
| 69 | ||
| 70 | typedef push_front_std_tuple< | |
| 71 | typename result_of::value_of<First>::type | |
| 72 | , typename next_build_std_tuple::type> | |
| 73 | push_front; | |
| 74 | ||
| 75 | typedef typename push_front::type type; | |
| 76 | ||
| 77 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 78 | static type | |
| 79 | call(First const& f, Last const& l) | |
| 80 | { | |
| 81 | typename result_of::value_of<First>::type v = *f; | |
| 82 | return push_front::call( | |
| 83 | v, next_build_std_tuple::call(fusion::next(f), l)); | |
| 84 | } | |
| 85 | }; | |
| 86 | }}} | |
| 87 | ||
| 88 | #endif |