67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
// This file is part of the uSTL library, an STL implementation.
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//
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// Copyright (c) 2005 by Mike Sharov <msharov@users.sourceforge.net>
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// This file is free software, distributed under the MIT License.
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#pragma once
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#include "ualgobase.h"
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namespace ustl {
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/// \class pair upair.h ustl.h
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/// \ingroup AssociativeContainers
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///
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/// \brief Container for two values.
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///
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template <typename T1, typename T2>
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class 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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/// Default constructor.
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inline constexpr pair (void) : first (T1()), second (T2()) {}
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/// Initializes members with \p a, and \p b.
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inline pair (const T1& a, const T2& b) : first (a), second (b) {}
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template <typename T3, typename T4>
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inline pair (const pair<T3,T4>& p2) : first (p2.first), second (p2.second) {}
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inline pair& operator= (const pair& p2) { first = p2.first; second = p2.second; return (*this); }
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template <typename T3, typename T4>
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inline pair& operator= (const pair<T3,T4>& p2) { first = p2.first; second = p2.second; return (*this); }
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inline bool operator== (const pair& v)const { return (first == v.first && second == v.second); }
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inline bool operator< (const pair& v) const { return (first < v.first || (first == v.first && second < v.second)); }
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inline void swap (pair& v) { swap(first,v.first); swap(second,v.second); }
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#if HAVE_CPP11
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pair (const pair&) = default;
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pair (pair&&) = default;
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template <typename T3, typename T4>
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inline pair (T3&& a, T4&& b) : first (forward<T3>(a)), second (forward<T4>(b)) {}
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template <typename T3, typename T4>
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inline pair (pair<T3,T4>&& p2) : first (forward<T3>(p2.first)), second (forward<T4>(p2.second)) {}
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inline pair& operator= (pair&& p2) { first = forward<T1>(p2.first); second = forward<T2>(p2.second); return (*this); }
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template <typename T3, typename T4>
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inline pair& operator= (pair<T3,T4>&& p2) { first = forward<T3>(p2.first); second = forward<T4>(p2.second); return (*this); }
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#endif
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public:
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first_type first;
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second_type second;
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};
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#if HAVE_CPP11
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/// Returns a pair object with (a,b)
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template <typename T1, typename T2>
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inline pair<T1,T2> make_pair (T1&& a, T2&& b)
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{ return (pair<T1,T2> (forward<T1>(a), forward<T2>(b))); }
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#else
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/// Returns a pair object with (a,b)
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template <typename T1, typename T2>
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inline pair<T1,T2> make_pair (const T1& a, const T2& b)
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{ return (pair<T1,T2> (a, b)); }
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#endif
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} // namespace ustl
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