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https://github.com/bolero-MURAKAMI/Sprout.git
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162 lines
5 KiB
C++
162 lines
5 KiB
C++
#ifndef SPROUT_UTILITY_PAIR_PAIR_DECL_HPP
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#define SPROUT_UTILITY_PAIR_PAIR_DECL_HPP
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#include <utility>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/index_tuple/metafunction.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/utility/swap.hpp>
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#include <sprout/utility/pair/pair_fwd.hpp>
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#include <sprout/tuple/tuple/tuple_fwd.hpp>
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namespace sprout {
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//
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// pair
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//
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template <typename T1, typename T2>
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struct pair {
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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public:
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T1 first;
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T2 second;
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private:
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template <typename... Args1, typename... Args2, sprout::index_t... Indexes1, sprout::index_t... Indexes2>
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SPROUT_CONSTEXPR pair(
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sprout::tuples::tuple<Args1...> first_args, sprout::tuples::tuple<Args2...> second_args,
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sprout::index_tuple<Indexes1...>, sprout::index_tuple<Indexes2...>
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);
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public:
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SPROUT_CONSTEXPR pair()
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: first()
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, second()
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{}
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SPROUT_CONSTEXPR pair(pair const&) = default;
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SPROUT_CONSTEXPR pair(pair&&) = default;
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SPROUT_CONSTEXPR pair(T1 const& x, T2 const& y)
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: first(x)
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, second(y)
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{}
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_constructible<first_type, U&&>::value && std::is_constructible<second_type, V&&>::value
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>::type
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>
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SPROUT_CONSTEXPR pair(U&& x, V&& y)
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: first(sprout::forward<U>(x))
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, second(sprout::forward<V>(y))
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{}
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_constructible<first_type, U const&>::value && std::is_constructible<second_type, V const&>::value
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>::type
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>
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SPROUT_CONSTEXPR pair(sprout::pair<U, V> const& other)
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: first(other.first)
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, second(other.second)
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{}
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_constructible<first_type, U&&>::value && std::is_constructible<second_type, V&&>::value
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>::type
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>
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SPROUT_CONSTEXPR pair(sprout::pair<U, V>&& other)
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: first(sprout::forward<U>(other.first))
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, second(sprout::forward<V>(other.second))
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{}
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template<
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typename... Args1, typename... Args2,
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typename = typename std::enable_if<
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std::is_constructible<first_type, Args1&&...>::value && std::is_constructible<second_type, Args2&&...>::value
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>::type
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>
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SPROUT_CONSTEXPR pair(
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std::piecewise_construct_t,
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sprout::tuples::tuple<Args1...> first_args, sprout::tuples::tuple<Args2...> second_args
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);
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_constructible<first_type, U const&>::value && std::is_constructible<second_type, V const&>::value
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>::type
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>
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SPROUT_CONSTEXPR pair(sprout::tuples::tuple<U, V> const& other);
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_constructible<first_type, U&&>::value && std::is_constructible<second_type, V&&>::value
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>::type
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>
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SPROUT_CONSTEXPR pair(sprout::tuples::tuple<U, V>&& other);
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pair& operator=(pair const& rhs) = default;
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pair& operator=(pair&& rhs)
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SPROUT_NOEXCEPT_EXPR(std::is_nothrow_move_assignable<T1>::value && std::is_nothrow_move_assignable<T2>::value)
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{
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first = sprout::forward<T1>(rhs.first);
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second = sprout::forward<T2>(rhs.second);
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return *this;
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}
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_assignable<first_type&, U const&>::value && std::is_assignable<second_type&, V const&>::value
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>::type
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>
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pair& operator=(sprout::pair<U, V> const& rhs) {
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first = rhs.first;
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second = rhs.second;
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return *this;
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}
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_assignable<first_type&, U&&>::value && std::is_assignable<second_type&, V&&>::value
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>::type
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>
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pair& operator=(sprout::pair<U, V>&& rhs) {
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first = sprout::forward<U>(rhs.first);
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second = sprout::forward<V>(rhs.second);
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return *this;
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}
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_assignable<first_type&, U const&>::value && std::is_assignable<second_type&, V const&>::value
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>::type
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>
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pair& operator=(sprout::tuples::tuple<U, V> const& rhs);
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template<
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typename U, typename V,
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typename = typename std::enable_if<
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std::is_assignable<first_type&, U&&>::value && std::is_assignable<second_type&, V&&>::value
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>::type
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>
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pair& operator=(sprout::tuples::tuple<U, V>&& rhs);
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void swap(pair& other)
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SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::swap(first, other.first)) && SPROUT_NOEXCEPT_EXPR(sprout::swap(second, other.second))) {
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sprout::swap(first, other.first);
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sprout::swap(second, other.second);
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}
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};
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//
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// swap
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//
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template<typename T1, typename T2>
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inline void
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swap(sprout::pair<T1, T2>& lhs, sprout::pair<T1, T2>& rhs)
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SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(lhs.swap(rhs)))
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{
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lhs.swap(rhs);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_PAIR_PAIR_DECL_HPP
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