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| |
| #ifndef QPAIR_H |
| #define QPAIR_H |
| |
| #include <QtCore/qglobal.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| template <class T1, class T2> |
| struct QPair |
| { |
| typedef T1 first_type; |
| typedef T2 second_type; |
| |
| Q_DECL_CONSTEXPR QPair() |
| noexcept((std::is_nothrow_default_constructible<T1>::value && |
| std::is_nothrow_default_constructible<T2>::value)) |
| : first(), second() {} |
| Q_DECL_CONSTEXPR QPair(const T1 &t1, const T2 &t2) |
| noexcept((std::is_nothrow_copy_constructible<T1>::value && |
| std::is_nothrow_copy_constructible<T2>::value)) |
| : first(t1), second(t2) {} |
| // compiler-generated copy/move ctor/assignment operators are fine! |
| |
| template <typename TT1, typename TT2> |
| Q_DECL_CONSTEXPR QPair(const QPair<TT1, TT2> &p) |
| noexcept((std::is_nothrow_constructible<T1, TT1&>::value && |
| std::is_nothrow_constructible<T2, TT2&>::value)) |
| : first(p.first), second(p.second) {} |
| template <typename TT1, typename TT2> |
| Q_DECL_RELAXED_CONSTEXPR QPair &operator=(const QPair<TT1, TT2> &p) |
| noexcept((std::is_nothrow_assignable<T1, TT1&>::value && |
| std::is_nothrow_assignable<T2, TT2&>::value)) |
| { first = p.first; second = p.second; return *this; } |
| template <typename TT1, typename TT2> |
| Q_DECL_CONSTEXPR QPair(QPair<TT1, TT2> &&p) |
| noexcept((std::is_nothrow_constructible<T1, TT1>::value && |
| std::is_nothrow_constructible<T2, TT2>::value)) |
| // can't use std::move here as it's not constexpr in C++11: |
| : first(static_cast<TT1 &&>(p.first)), second(static_cast<TT2 &&>(p.second)) {} |
| template <typename TT1, typename TT2> |
| Q_DECL_RELAXED_CONSTEXPR QPair &operator=(QPair<TT1, TT2> &&p) |
| noexcept((std::is_nothrow_assignable<T1, TT1>::value && |
| std::is_nothrow_assignable<T2, TT2>::value)) |
| { first = std::move(p.first); second = std::move(p.second); return *this; } |
| |
| Q_DECL_RELAXED_CONSTEXPR void swap(QPair &other) |
| noexcept(noexcept(qSwap(other.first, other.first)) && noexcept(qSwap(other.second, other.second))) |
| { |
| // use qSwap() to pick up ADL swaps automatically: |
| qSwap(first, other.first); |
| qSwap(second, other.second); |
| } |
| |
| T1 first; |
| T2 second; |
| }; |
| |
| #if defined(__cpp_deduction_guides) && __cpp_deduction_guides >= 201606 |
| template<class T1, class T2> |
| QPair(T1, T2) -> QPair<T1, T2>; |
| #endif |
| |
| template <typename T1, typename T2> |
| void swap(QPair<T1, T2> &lhs, QPair<T1, T2> &rhs) noexcept(noexcept(lhs.swap(rhs))) |
| { lhs.swap(rhs); } |
| |
| // mark QPair<T1,T2> as complex/movable/primitive depending on the |
| // typeinfos of the constituents: |
| template<class T1, class T2> |
| class QTypeInfo<QPair<T1, T2> > : public QTypeInfoMerger<QPair<T1, T2>, T1, T2> {}; // Q_DECLARE_TYPEINFO |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_INLINE_TEMPLATE bool operator==(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2) |
| noexcept(noexcept(p1.first == p2.first && p1.second == p2.second)) |
| { return p1.first == p2.first && p1.second == p2.second; } |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_INLINE_TEMPLATE bool operator!=(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2) |
| noexcept(noexcept(!(p1 == p2))) |
| { return !(p1 == p2); } |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_INLINE_TEMPLATE bool operator<(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2) |
| noexcept(noexcept(p1.first < p2.first || (!(p2.first < p1.first) && p1.second < p2.second))) |
| { |
| return p1.first < p2.first || (!(p2.first < p1.first) && p1.second < p2.second); |
| } |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_INLINE_TEMPLATE bool operator>(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2) |
| noexcept(noexcept(p2 < p1)) |
| { |
| return p2 < p1; |
| } |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_INLINE_TEMPLATE bool operator<=(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2) |
| noexcept(noexcept(!(p2 < p1))) |
| { |
| return !(p2 < p1); |
| } |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_INLINE_TEMPLATE bool operator>=(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2) |
| noexcept(noexcept(!(p1 < p2))) |
| { |
| return !(p1 < p2); |
| } |
| |
| template <class T1, class T2> |
| Q_DECL_CONSTEXPR Q_OUTOFLINE_TEMPLATE QPair<T1, T2> qMakePair(const T1 &x, const T2 &y) |
| noexcept(noexcept(QPair<T1, T2>(x, y))) |
| { |
| return QPair<T1, T2>(x, y); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QPAIR_H |