forked from boostorg/container
379 lines
9.3 KiB
C++
379 lines
9.3 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2005-2013.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/container for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_CONTAINER_CONTAINER_DETAIL_PAIR_HPP
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#define BOOST_CONTAINER_CONTAINER_DETAIL_PAIR_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/container/detail/config_begin.hpp>
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#include <boost/container/detail/workaround.hpp>
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#include <boost/container/detail/mpl.hpp>
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#include <boost/container/detail/type_traits.hpp>
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#include <boost/container/detail/mpl.hpp>
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#include <boost/container/detail/std_fwd.hpp>
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#include <boost/move/adl_move_swap.hpp> //swap
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#include <boost/intrusive/detail/minimal_pair_header.hpp> //pair
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#include <boost/move/utility_core.hpp>
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namespace boost {
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namespace container {
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namespace container_detail {
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template <class T1, class T2>
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struct pair;
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template <class T>
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struct is_pair
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{
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static const bool value = false;
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};
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template <class T1, class T2>
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struct is_pair< pair<T1, T2> >
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{
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static const bool value = true;
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};
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template <class T1, class T2>
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struct is_pair< std::pair<T1, T2> >
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{
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static const bool value = true;
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};
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template <class T>
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struct is_not_pair
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{
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static const bool value = !is_pair<T>::value;
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};
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template <class T>
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struct is_std_pair
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{
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static const bool value = false;
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};
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template <class T1, class T2>
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struct is_std_pair< std::pair<T1, T2> >
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{
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static const bool value = true;
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};
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struct pair_nat;
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template <class T1, class T2>
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struct pair
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{
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private:
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BOOST_COPYABLE_AND_MOVABLE(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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T1 first;
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T2 second;
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//Default constructor
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pair()
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: first(), second()
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{}
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//pair copy assignment
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pair(const pair& x)
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: first(x.first), second(x.second)
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{}
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//pair move constructor
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pair(BOOST_RV_REF(pair) p)
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: first(::boost::move(p.first)), second(::boost::move(p.second))
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{}
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template <class D, class S>
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pair(const pair<D, S> &p)
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: first(p.first), second(p.second)
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{}
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template <class D, class S>
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pair(BOOST_RV_REF_BEG pair<D, S> BOOST_RV_REF_END p)
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: first(::boost::move(p.first)), second(::boost::move(p.second))
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{}
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//pair from two values
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pair(const T1 &t1, const T2 &t2)
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: first(t1)
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, second(t2)
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{}
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template<class U, class V>
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pair(BOOST_FWD_REF(U) u, BOOST_FWD_REF(V) v)
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: first(::boost::forward<U>(u))
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, second(::boost::forward<V>(v))
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{}
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//And now compatibility with std::pair
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pair(const std::pair<T1, T2>& x)
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: first(x.first), second(x.second)
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{}
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template <class D, class S>
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pair(const std::pair<D, S>& p)
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: first(p.first), second(p.second)
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{}
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pair(BOOST_RV_REF_BEG std::pair<T1, T2> BOOST_RV_REF_END p)
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: first(::boost::move(p.first)), second(::boost::move(p.second))
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{}
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template <class D, class S>
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pair(BOOST_RV_REF_BEG std::pair<D, S> BOOST_RV_REF_END p)
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: first(::boost::move(p.first)), second(::boost::move(p.second))
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{}
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//piecewise_construct missing
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//template <class U, class V> pair(pair<U, V>&& p);
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//template <class... Args1, class... Args2>
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// pair(piecewise_construct_t, tuple<Args1...> first_args,
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// tuple<Args2...> second_args);
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//pair copy assignment
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pair& operator=(BOOST_COPY_ASSIGN_REF(pair) p)
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{
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first = p.first;
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second = p.second;
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return *this;
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}
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//pair move assignment
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pair& operator=(BOOST_RV_REF(pair) p)
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{
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first = ::boost::move(p.first);
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second = ::boost::move(p.second);
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return *this;
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}
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template <class D, class S>
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typename ::boost::container::container_detail::disable_if_or
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< pair &
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, ::boost::container::container_detail::is_same<T1, D>
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, ::boost::container::container_detail::is_same<T2, S>
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>::type
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operator=(const pair<D, S>&p)
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{
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first = p.first;
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second = p.second;
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return *this;
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}
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template <class D, class S>
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typename ::boost::container::container_detail::disable_if_or
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< pair &
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, ::boost::container::container_detail::is_same<T1, D>
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, ::boost::container::container_detail::is_same<T2, S>
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>::type
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operator=(BOOST_RV_REF_BEG pair<D, S> BOOST_RV_REF_END p)
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{
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first = ::boost::move(p.first);
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second = ::boost::move(p.second);
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return *this;
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}
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//std::pair copy assignment
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pair& operator=(const std::pair<T1, T2> &p)
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{
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first = p.first;
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second = p.second;
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return *this;
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}
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template <class D, class S>
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pair& operator=(const std::pair<D, S> &p)
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{
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first = ::boost::move(p.first);
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second = ::boost::move(p.second);
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return *this;
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}
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//std::pair move assignment
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pair& operator=(BOOST_RV_REF_BEG std::pair<T1, T2> BOOST_RV_REF_END p)
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{
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first = ::boost::move(p.first);
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second = ::boost::move(p.second);
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return *this;
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}
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template <class D, class S>
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pair& operator=(BOOST_RV_REF_BEG std::pair<D, S> BOOST_RV_REF_END p)
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{
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first = ::boost::move(p.first);
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second = ::boost::move(p.second);
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return *this;
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}
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//swap
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void swap(pair& p)
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{
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::boost::adl_move_swap(this->first, p.first);
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::boost::adl_move_swap(this->second, p.second);
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}
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};
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template <class T1, class T2>
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inline bool operator==(const pair<T1,T2>& x, const pair<T1,T2>& y)
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{ return static_cast<bool>(x.first == y.first && x.second == y.second); }
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template <class T1, class T2>
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inline bool operator< (const pair<T1,T2>& x, const pair<T1,T2>& y)
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{ return static_cast<bool>(x.first < y.first ||
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(!(y.first < x.first) && x.second < y.second)); }
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template <class T1, class T2>
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inline bool operator!=(const pair<T1,T2>& x, const pair<T1,T2>& y)
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{ return static_cast<bool>(!(x == y)); }
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template <class T1, class T2>
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inline bool operator> (const pair<T1,T2>& x, const pair<T1,T2>& y)
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{ return y < x; }
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template <class T1, class T2>
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inline bool operator>=(const pair<T1,T2>& x, const pair<T1,T2>& y)
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{ return static_cast<bool>(!(x < y)); }
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template <class T1, class T2>
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inline bool operator<=(const pair<T1,T2>& x, const pair<T1,T2>& y)
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{ return static_cast<bool>(!(y < x)); }
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template <class T1, class T2>
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inline pair<T1, T2> make_pair(T1 x, T2 y)
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{ return pair<T1, T2>(x, y); }
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template <class T1, class T2>
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inline void swap(pair<T1, T2>& x, pair<T1, T2>& y)
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{ x.swap(y); }
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} //namespace container_detail {
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} //namespace container {
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//Without this specialization recursive flat_(multi)map instantiation fails
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//because is_enum needs to instantiate the recursive pair, leading to a compilation error).
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//This breaks the cycle clearly stating that pair is not an enum avoiding any instantiation.
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template<class T>
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struct is_enum;
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template<class T, class U>
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struct is_enum< ::boost::container::container_detail::pair<T, U> >
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{
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static const bool value = false;
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};
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template<class T, class U>
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struct is_enum< ::std::pair<T, U> >
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{
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static const bool value = false;
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};
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template <class T>
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struct is_class;
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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template <class T1, class T2>
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struct is_class< ::boost::container::container_detail::pair<T1, T2> >
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{
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static const bool value = true;
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};
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#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
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template<class T1, class T2>
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struct has_move_emulation_enabled< ::boost::container::container_detail::pair<T1, T2> >
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{
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static const bool value = true;
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};
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#endif
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namespace move_detail{
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template<class T>
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struct is_class_or_union;
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template <class T1, class T2>
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struct is_class_or_union< ::boost::container::container_detail::pair<T1, T2> >
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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{
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static const bool value = true;
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};
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template <class T1, class T2>
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struct is_class_or_union< std::pair<T1, T2> >
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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{
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static const bool value = true;
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};
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template<class T>
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struct is_union;
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template <class T1, class T2>
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struct is_union< ::boost::container::container_detail::pair<T1, T2> >
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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{
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static const bool value = false;
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};
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template <class T1, class T2>
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struct is_union< std::pair<T1, T2> >
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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{
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static const bool value = false;
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};
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template<class T>
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struct is_class;
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template <class T1, class T2>
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struct is_class< ::boost::container::container_detail::pair<T1, T2> >
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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{
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static const bool value = true;
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};
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template <class T1, class T2>
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struct is_class< std::pair<T1, T2> >
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//This specialization is needed to avoid instantiation of pair in
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//is_class, and allow recursive maps.
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{
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static const bool value = true;
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};
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} //namespace move_detail{
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} //namespace boost {
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#include <boost/container/detail/config_end.hpp>
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#endif //#ifndef BOOST_CONTAINER_DETAIL_PAIR_HPP
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