| // -*- C++ -*- |
| //===-------------------------- utility -----------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP_UTILITY |
| #define _LIBCPP_UTILITY |
| |
| /* |
| utility synopsis |
| |
| namespace std |
| { |
| |
| template <class T> |
| void |
| swap(T& a, T& b); |
| |
| namespace rel_ops |
| { |
| template<class T> bool operator!=(const T&, const T&); |
| template<class T> bool operator> (const T&, const T&); |
| template<class T> bool operator<=(const T&, const T&); |
| template<class T> bool operator>=(const T&, const T&); |
| } |
| |
| template<class T> |
| void |
| swap(T& a, T& b) noexcept(is_nothrow_move_constructible<T>::value && |
| is_nothrow_move_assignable<T>::value); |
| |
| template <class T, size_t N> |
| void |
| swap(T (&a)[N], T (&b)[N]) noexcept(noexcept(swap(*a, *b))); |
| |
| template <class T> T&& forward(typename remove_reference<T>::type& t) noexcept; // constexpr in C++14 |
| template <class T> T&& forward(typename remove_reference<T>::type&& t) noexcept; // constexpr in C++14 |
| |
| template <class T> typename remove_reference<T>::type&& move(T&&) noexcept; // constexpr in C++14 |
| |
| template <class T> |
| typename conditional |
| < |
| !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value, |
| const T&, |
| T&& |
| >::type |
| move_if_noexcept(T& x) noexcept; // constexpr in C++14 |
| |
| template <class T> constexpr add_const<T>_t& as_const(T& t) noexcept; // C++17 |
| template <class T> void as_const(const T&&) = delete; // C++17 |
| |
| template <class T> typename add_rvalue_reference<T>::type declval() noexcept; |
| |
| template <class T1, class T2> |
| struct pair |
| { |
| typedef T1 first_type; |
| typedef T2 second_type; |
| |
| T1 first; |
| T2 second; |
| |
| pair(const pair&) = default; |
| pair(pair&&) = default; |
| constexpr pair(); |
| pair(const T1& x, const T2& y); // constexpr in C++14 |
| template <class U, class V> pair(U&& x, V&& y); // constexpr in C++14 |
| template <class U, class V> pair(const pair<U, V>& p); // constexpr in C++14 |
| template <class U, class V> pair(pair<U, V>&& p); // constexpr in C++14 |
| template <class... Args1, class... Args2> |
| pair(piecewise_construct_t, tuple<Args1...> first_args, |
| tuple<Args2...> second_args); |
| |
| template <class U, class V> pair& operator=(const pair<U, V>& p); |
| pair& operator=(pair&& p) noexcept(is_nothrow_move_assignable<T1>::value && |
| is_nothrow_move_assignable<T2>::value); |
| template <class U, class V> pair& operator=(pair<U, V>&& p); |
| |
| void swap(pair& p) noexcept(is_nothrow_swappable_v<T1> && |
| is_nothrow_swappable_v<T2>); |
| }; |
| |
| template <class T1, class T2> bool operator==(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 |
| template <class T1, class T2> bool operator!=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 |
| template <class T1, class T2> bool operator< (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 |
| template <class T1, class T2> bool operator> (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 |
| template <class T1, class T2> bool operator>=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 |
| template <class T1, class T2> bool operator<=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 |
| |
| template <class T1, class T2> pair<V1, V2> make_pair(T1&&, T2&&); // constexpr in C++14 |
| template <class T1, class T2> |
| void |
| swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y))); |
| |
| struct piecewise_construct_t { }; |
| constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); |
| |
| template <class T> class tuple_size; |
| template <size_t I, class T> class tuple_element; |
| |
| template <class T1, class T2> struct tuple_size<pair<T1, T2> >; |
| template <class T1, class T2> struct tuple_element<0, pair<T1, T2> >; |
| template <class T1, class T2> struct tuple_element<1, pair<T1, T2> >; |
| |
| template<size_t I, class T1, class T2> |
| typename tuple_element<I, pair<T1, T2> >::type& |
| get(pair<T1, T2>&) noexcept; // constexpr in C++14 |
| |
| template<size_t I, class T1, class T2> |
| const typename tuple_element<I, pair<T1, T2> >::type& |
| get(const pair<T1, T2>&) noexcept; // constexpr in C++14 |
| |
| template<size_t I, class T1, class T2> |
| typename tuple_element<I, pair<T1, T2> >::type&& |
| get(pair<T1, T2>&&) noexcept; // constexpr in C++14 |
| |
| template<size_t I, class T1, class T2> |
| const typename tuple_element<I, pair<T1, T2> >::type&& |
| get(const pair<T1, T2>&&) noexcept; // constexpr in C++14 |
| |
| template<class T1, class T2> |
| constexpr T1& get(pair<T1, T2>&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr const T1& get(const pair<T1, T2>&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr T1&& get(pair<T1, T2>&&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr const T1&& get(const pair<T1, T2>&&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr T1& get(pair<T2, T1>&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr const T1& get(const pair<T2, T1>&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr T1&& get(pair<T2, T1>&&) noexcept; // C++14 |
| |
| template<class T1, class T2> |
| constexpr const T1&& get(const pair<T2, T1>&&) noexcept; // C++14 |
| |
| // C++14 |
| |
| template<class T, T... I> |
| struct integer_sequence |
| { |
| typedef T value_type; |
| |
| static constexpr size_t size() noexcept; |
| }; |
| |
| template<size_t... I> |
| using index_sequence = integer_sequence<size_t, I...>; |
| |
| template<class T, T N> |
| using make_integer_sequence = integer_sequence<T, 0, 1, ..., N-1>; |
| template<size_t N> |
| using make_index_sequence = make_integer_sequence<size_t, N>; |
| |
| template<class... T> |
| using index_sequence_for = make_index_sequence<sizeof...(T)>; |
| |
| template<class T, class U=T> |
| T exchange(T& obj, U&& new_value); |
| |
| // 20.2.7, in-place construction // C++17 |
| struct in_place_t { |
| explicit in_place_t() = default; |
| }; |
| inline constexpr in_place_t in_place{}; |
| template <class T> |
| struct in_place_type_t { |
| explicit in_place_type_t() = default; |
| }; |
| template <class T> |
| inline constexpr in_place_type_t<T> in_place_type{}; |
| template <size_t I> |
| struct in_place_index_t { |
| explicit in_place_index_t() = default; |
| }; |
| template <size_t I> |
| inline constexpr in_place_index_t<I> in_place_index{}; |
| |
| } // std |
| |
| */ |
| |
| #include <__config> |
| #include <__tuple> |
| #include <type_traits> |
| #include <initializer_list> |
| #include <__debug> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace rel_ops |
| { |
| |
| template<class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator!=(const _Tp& __x, const _Tp& __y) |
| { |
| return !(__x == __y); |
| } |
| |
| template<class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator> (const _Tp& __x, const _Tp& __y) |
| { |
| return __y < __x; |
| } |
| |
| template<class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator<=(const _Tp& __x, const _Tp& __y) |
| { |
| return !(__y < __x); |
| } |
| |
| template<class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator>=(const _Tp& __x, const _Tp& __y) |
| { |
| return !(__x < __y); |
| } |
| |
| } // rel_ops |
| |
| // swap_ranges |
| |
| |
| template <class _ForwardIterator1, class _ForwardIterator2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _ForwardIterator2 |
| swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) |
| { |
| for(; __first1 != __last1; ++__first1, (void) ++__first2) |
| swap(*__first1, *__first2); |
| return __first2; |
| } |
| |
| // forward declared in <type_traits> |
| template<class _Tp, size_t _Np> |
| inline _LIBCPP_INLINE_VISIBILITY |
| typename enable_if< |
| __is_swappable<_Tp>::value |
| >::type |
| swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np]) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value) |
| { |
| _VSTD::swap_ranges(__a, __a + _Np, __b); |
| } |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| typename conditional |
| < |
| !is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, |
| const _Tp&, |
| _Tp&& |
| >::type |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| const _Tp& |
| #endif |
| move_if_noexcept(_Tp& __x) _NOEXCEPT |
| { |
| return _VSTD::move(__x); |
| } |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> constexpr add_const_t<_Tp>& as_const(_Tp& __t) noexcept { return __t; } |
| template <class _Tp> void as_const(const _Tp&&) = delete; |
| #endif |
| |
| struct _LIBCPP_TYPE_VIS_ONLY piecewise_construct_t { }; |
| #if defined(_LIBCPP_HAS_NO_CONSTEXPR) || defined(_LIBCPP_BUILDING_UTILITY) |
| extern const piecewise_construct_t piecewise_construct;// = piecewise_construct_t(); |
| #else |
| constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); |
| #endif |
| |
| #if defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR) |
| struct __non_trivially_copyable_base { |
| _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY |
| __non_trivially_copyable_base() _NOEXCEPT {} |
| _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY |
| __non_trivially_copyable_base(__non_trivially_copyable_base const&) _NOEXCEPT {} |
| }; |
| #endif |
| |
| template <class _T1, class _T2> |
| struct _LIBCPP_TYPE_VIS_ONLY pair |
| #if defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR) |
| : private __non_trivially_copyable_base |
| #endif |
| { |
| typedef _T1 first_type; |
| typedef _T2 second_type; |
| |
| _T1 first; |
| _T2 second; |
| |
| #if !defined(_LIBCPP_CXX03_LANG) |
| pair(pair const&) = default; |
| pair(pair&&) = default; |
| #else |
| // Use the implicitly declared copy constructor in C++03 |
| #endif |
| |
| #ifdef _LIBCPP_CXX03_LANG |
| _LIBCPP_INLINE_VISIBILITY |
| pair() : first(), second() {} |
| |
| _LIBCPP_INLINE_VISIBILITY |
| pair(_T1 const& __t1, _T2 const& __t2) : first(__t1), second(__t2) {} |
| |
| template <class _U1, class _U2> |
| _LIBCPP_INLINE_VISIBILITY |
| pair(const pair<_U1, _U2>& __p) : first(__p.first), second(__p.second) {} |
| |
| _LIBCPP_INLINE_VISIBILITY |
| pair& operator=(pair const& __p) { |
| first = __p.first; |
| second = __p.second; |
| return *this; |
| } |
| #else |
| template <bool _Val> |
| using _EnableB = typename enable_if<_Val, bool>::type; |
| |
| struct _CheckArgs { |
| template <class _U1, class _U2> |
| static constexpr bool __enable_default() { |
| return is_default_constructible<_U1>::value |
| && is_default_constructible<_U2>::value; |
| } |
| |
| template <class _U1, class _U2> |
| static constexpr bool __enable_explicit() { |
| return is_constructible<first_type, _U1>::value |
| && is_constructible<second_type, _U2>::value |
| && (!is_convertible<_U1, first_type>::value |
| || !is_convertible<_U2, second_type>::value); |
| } |
| |
| template <class _U1, class _U2> |
| static constexpr bool __enable_implicit() { |
| return is_constructible<first_type, _U1>::value |
| && is_constructible<second_type, _U2>::value |
| && is_convertible<_U1, first_type>::value |
| && is_convertible<_U2, second_type>::value; |
| } |
| }; |
| |
| template <bool _MaybeEnable> |
| using _CheckArgsDep = typename conditional< |
| _MaybeEnable, _CheckArgs, __check_tuple_constructor_fail>::type; |
| |
| struct _CheckTupleLikeConstructor { |
| template <class _Tuple> |
| static constexpr bool __enable_implicit() { |
| return __tuple_convertible<_Tuple, pair>::value; |
| } |
| |
| template <class _Tuple> |
| static constexpr bool __enable_explicit() { |
| return __tuple_constructible<_Tuple, pair>::value |
| && !__tuple_convertible<_Tuple, pair>::value; |
| } |
| |
| template <class _Tuple> |
| static constexpr bool __enable_assign() { |
| return __tuple_assignable<_Tuple, pair>::value; |
| } |
| }; |
| |
| template <class _Tuple> |
| using _CheckTLC = typename conditional< |
| __tuple_like_with_size<_Tuple, 2>::value |
| && !is_same<typename decay<_Tuple>::type, pair>::value, |
| _CheckTupleLikeConstructor, |
| __check_tuple_constructor_fail |
| >::type; |
| |
| template<bool _Dummy = true, _EnableB< |
| _CheckArgsDep<_Dummy>::template __enable_default<_T1, _T2>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| pair() : first(), second() {} |
| |
| template <bool _Dummy = true, _EnableB< |
| _CheckArgsDep<_Dummy>::template __enable_explicit<_T1 const&, _T2 const&>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| explicit pair(_T1 const& __t1, _T2 const& __t2) |
| : first(__t1), second(__t2) {} |
| |
| template<bool _Dummy = true, _EnableB< |
| _CheckArgsDep<_Dummy>::template __enable_implicit<_T1 const&, _T2 const&>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair(_T1 const& __t1, _T2 const& __t2) |
| : first(__t1), second(__t2) {} |
| |
| template<class _U1, class _U2, _EnableB< |
| _CheckArgs::template __enable_explicit<_U1, _U2>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| explicit pair(_U1&& __u1, _U2&& __u2) |
| : first(_VSTD::forward<_U1>(__u1)), second(_VSTD::forward<_U2>(__u2)) {} |
| |
| template<class _U1, class _U2, _EnableB< |
| _CheckArgs::template __enable_implicit<_U1, _U2>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair(_U1&& __u1, _U2&& __u2) |
| : first(_VSTD::forward<_U1>(__u1)), second(_VSTD::forward<_U2>(__u2)) {} |
| |
| template<class _U1, class _U2, _EnableB< |
| _CheckArgs::template __enable_explicit<_U1 const&, _U2 const&>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| explicit pair(pair<_U1, _U2> const& __p) |
| : first(__p.first), second(__p.second) {} |
| |
| template<class _U1, class _U2, _EnableB< |
| _CheckArgs::template __enable_implicit<_U1 const&, _U2 const&>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair(pair<_U1, _U2> const& __p) |
| : first(__p.first), second(__p.second) {} |
| |
| template<class _U1, class _U2, _EnableB< |
| _CheckArgs::template __enable_explicit<_U1, _U2>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| explicit pair(pair<_U1, _U2>&&__p) |
| : first(_VSTD::forward<_U1>(__p.first)), second(_VSTD::forward<_U2>(__p.second)) {} |
| |
| template<class _U1, class _U2, _EnableB< |
| _CheckArgs::template __enable_implicit<_U1, _U2>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair(pair<_U1, _U2>&& __p) |
| : first(_VSTD::forward<_U1>(__p.first)), second(_VSTD::forward<_U2>(__p.second)) {} |
| |
| template<class _Tuple, _EnableB< |
| _CheckTLC<_Tuple>::template __enable_explicit<_Tuple>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| explicit pair(_Tuple&& __p) |
| : first(_VSTD::get<0>(_VSTD::forward<_Tuple>(__p))), |
| second(_VSTD::get<1>(_VSTD::forward<_Tuple>(__p))) {} |
| |
| template<class _Tuple, _EnableB< |
| _CheckTLC<_Tuple>::template __enable_implicit<_Tuple>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair(_Tuple&& __p) |
| : first(_VSTD::get<0>(_VSTD::forward<_Tuple>(__p))), |
| second(_VSTD::get<1>(_VSTD::forward<_Tuple>(__p))) {} |
| |
| template <class... _Args1, class... _Args2> |
| _LIBCPP_INLINE_VISIBILITY |
| pair(piecewise_construct_t __pc, |
| tuple<_Args1...> __first_args, tuple<_Args2...> __second_args) |
| : pair(__pc, __first_args, __second_args, |
| typename __make_tuple_indices<sizeof...(_Args1)>::type(), |
| typename __make_tuple_indices<sizeof...(_Args2) >::type()) {} |
| |
| _LIBCPP_INLINE_VISIBILITY |
| pair& operator=(typename conditional< |
| is_copy_assignable<first_type>::value && |
| is_copy_assignable<second_type>::value, |
| pair, __nat>::type const& __p) |
| _NOEXCEPT_(is_nothrow_copy_assignable<first_type>::value && |
| is_nothrow_copy_assignable<second_type>::value) |
| { |
| first = __p.first; |
| second = __p.second; |
| return *this; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY |
| pair& operator=(typename conditional< |
| is_move_assignable<first_type>::value && |
| is_move_assignable<second_type>::value, |
| pair, __nat>::type&& __p) |
| _NOEXCEPT_(is_nothrow_move_assignable<first_type>::value && |
| is_nothrow_move_assignable<second_type>::value) |
| { |
| first = _VSTD::forward<first_type>(__p.first); |
| second = _VSTD::forward<second_type>(__p.second); |
| return *this; |
| } |
| |
| template <class _Tuple, _EnableB< |
| _CheckTLC<_Tuple>::template __enable_assign<_Tuple>() |
| > = false> |
| _LIBCPP_INLINE_VISIBILITY |
| pair& operator=(_Tuple&& __p) { |
| first = _VSTD::get<0>(_VSTD::forward<_Tuple>(__p)); |
| second = _VSTD::get<1>(_VSTD::forward<_Tuple>(__p)); |
| return *this; |
| } |
| #endif |
| |
| _LIBCPP_INLINE_VISIBILITY |
| void |
| swap(pair& __p) _NOEXCEPT_(__is_nothrow_swappable<first_type>::value && |
| __is_nothrow_swappable<second_type>::value) |
| { |
| using _VSTD::swap; |
| swap(first, __p.first); |
| swap(second, __p.second); |
| } |
| private: |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2> |
| _LIBCPP_INLINE_VISIBILITY |
| pair(piecewise_construct_t, |
| tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args, |
| __tuple_indices<_I1...>, __tuple_indices<_I2...>); |
| #endif |
| }; |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| bool |
| operator==(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) |
| { |
| return __x.first == __y.first && __x.second == __y.second; |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| bool |
| operator!=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) |
| { |
| return !(__x == __y); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| bool |
| operator< (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) |
| { |
| return __x.first < __y.first || (!(__y.first < __x.first) && __x.second < __y.second); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| bool |
| operator> (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) |
| { |
| return __y < __x; |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| bool |
| operator>=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) |
| { |
| return !(__x < __y); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| bool |
| operator<=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) |
| { |
| return !(__y < __x); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| typename enable_if |
| < |
| __is_swappable<_T1>::value && |
| __is_swappable<_T2>::value, |
| void |
| >::type |
| swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y) |
| _NOEXCEPT_((__is_nothrow_swappable<_T1>::value && |
| __is_nothrow_swappable<_T2>::value)) |
| { |
| __x.swap(__y); |
| } |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| |
| template <class _Tp> |
| struct __make_pair_return_impl |
| { |
| typedef _Tp type; |
| }; |
| |
| template <class _Tp> |
| struct __make_pair_return_impl<reference_wrapper<_Tp>> |
| { |
| typedef _Tp& type; |
| }; |
| |
| template <class _Tp> |
| struct __make_pair_return |
| { |
| typedef typename __make_pair_return_impl<typename decay<_Tp>::type>::type type; |
| }; |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair<typename __make_pair_return<_T1>::type, typename __make_pair_return<_T2>::type> |
| make_pair(_T1&& __t1, _T2&& __t2) |
| { |
| return pair<typename __make_pair_return<_T1>::type, typename __make_pair_return<_T2>::type> |
| (_VSTD::forward<_T1>(__t1), _VSTD::forward<_T2>(__t2)); |
| } |
| |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| pair<_T1,_T2> |
| make_pair(_T1 __x, _T2 __y) |
| { |
| return pair<_T1, _T2>(__x, __y); |
| } |
| |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _T1, class _T2> |
| class _LIBCPP_TYPE_VIS_ONLY tuple_size<pair<_T1, _T2> > |
| : public integral_constant<size_t, 2> {}; |
| |
| template <class _T1, class _T2> |
| class _LIBCPP_TYPE_VIS_ONLY tuple_element<0, pair<_T1, _T2> > |
| { |
| public: |
| typedef _T1 type; |
| }; |
| |
| template <class _T1, class _T2> |
| class _LIBCPP_TYPE_VIS_ONLY tuple_element<1, pair<_T1, _T2> > |
| { |
| public: |
| typedef _T2 type; |
| }; |
| |
| template <size_t _Ip> struct __get_pair; |
| |
| template <> |
| struct __get_pair<0> |
| { |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| _T1& |
| get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;} |
| |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const _T1& |
| get(const pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;} |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| _T1&& |
| get(pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<_T1>(__p.first);} |
| |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const _T1&& |
| get(const pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<const _T1>(__p.first);} |
| |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| }; |
| |
| template <> |
| struct __get_pair<1> |
| { |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| _T2& |
| get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;} |
| |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const _T2& |
| get(const pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;} |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| _T2&& |
| get(pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<_T2>(__p.second);} |
| |
| template <class _T1, class _T2> |
| static |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const _T2&& |
| get(const pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<const _T2>(__p.second);} |
| |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| }; |
| |
| template <size_t _Ip, class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| typename tuple_element<_Ip, pair<_T1, _T2> >::type& |
| get(pair<_T1, _T2>& __p) _NOEXCEPT |
| { |
| return __get_pair<_Ip>::get(__p); |
| } |
| |
| template <size_t _Ip, class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const typename tuple_element<_Ip, pair<_T1, _T2> >::type& |
| get(const pair<_T1, _T2>& __p) _NOEXCEPT |
| { |
| return __get_pair<_Ip>::get(__p); |
| } |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <size_t _Ip, class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| typename tuple_element<_Ip, pair<_T1, _T2> >::type&& |
| get(pair<_T1, _T2>&& __p) _NOEXCEPT |
| { |
| return __get_pair<_Ip>::get(_VSTD::move(__p)); |
| } |
| |
| template <size_t _Ip, class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const typename tuple_element<_Ip, pair<_T1, _T2> >::type&& |
| get(const pair<_T1, _T2>&& __p) _NOEXCEPT |
| { |
| return __get_pair<_Ip>::get(_VSTD::move(__p)); |
| } |
| |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 & get(pair<_T1, _T2>& __p) _NOEXCEPT |
| { |
| return __get_pair<0>::get(__p); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 const & get(pair<_T1, _T2> const& __p) _NOEXCEPT |
| { |
| return __get_pair<0>::get(__p); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 && get(pair<_T1, _T2>&& __p) _NOEXCEPT |
| { |
| return __get_pair<0>::get(_VSTD::move(__p)); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 const && get(pair<_T1, _T2> const&& __p) _NOEXCEPT |
| { |
| return __get_pair<0>::get(_VSTD::move(__p)); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 & get(pair<_T2, _T1>& __p) _NOEXCEPT |
| { |
| return __get_pair<1>::get(__p); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 const & get(pair<_T2, _T1> const& __p) _NOEXCEPT |
| { |
| return __get_pair<1>::get(__p); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 && get(pair<_T2, _T1>&& __p) _NOEXCEPT |
| { |
| return __get_pair<1>::get(_VSTD::move(__p)); |
| } |
| |
| template <class _T1, class _T2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| constexpr _T1 const && get(pair<_T2, _T1> const&& __p) _NOEXCEPT |
| { |
| return __get_pair<1>::get(_VSTD::move(__p)); |
| } |
| |
| #endif |
| |
| #if _LIBCPP_STD_VER > 11 |
| |
| template<class _Tp, _Tp... _Ip> |
| struct _LIBCPP_TYPE_VIS_ONLY integer_sequence |
| { |
| typedef _Tp value_type; |
| static_assert( is_integral<_Tp>::value, |
| "std::integer_sequence can only be instantiated with an integral type" ); |
| static |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr |
| size_t |
| size() noexcept { return sizeof...(_Ip); } |
| }; |
| |
| template<size_t... _Ip> |
| using index_sequence = integer_sequence<size_t, _Ip...>; |
| |
| #if __has_builtin(__make_integer_seq) && !defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE) |
| |
| template <class _Tp, _Tp _Ep> |
| using __make_integer_sequence = __make_integer_seq<integer_sequence, _Tp, _Ep>; |
| |
| #else |
| |
| template<typename _Tp, _Tp _Np> using __make_integer_sequence_unchecked = |
| typename __detail::__make<_Np>::type::template __convert<integer_sequence, _Tp>; |
| |
| template <class _Tp, _Tp _Ep> |
| struct __make_integer_sequence_checked |
| { |
| static_assert(is_integral<_Tp>::value, |
| "std::make_integer_sequence can only be instantiated with an integral type" ); |
| static_assert(0 <= _Ep, "std::make_integer_sequence must have a non-negative sequence length"); |
| // Workaround GCC bug by preventing bad installations when 0 <= _Ep |
| // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68929 |
| typedef __make_integer_sequence_unchecked<_Tp, 0 <= _Ep ? _Ep : 0> type; |
| }; |
| |
| template <class _Tp, _Tp _Ep> |
| using __make_integer_sequence = typename __make_integer_sequence_checked<_Tp, _Ep>::type; |
| |
| #endif |
| |
| template<class _Tp, _Tp _Np> |
| using make_integer_sequence = __make_integer_sequence<_Tp, _Np>; |
| |
| template<size_t _Np> |
| using make_index_sequence = make_integer_sequence<size_t, _Np>; |
| |
| template<class... _Tp> |
| using index_sequence_for = make_index_sequence<sizeof...(_Tp)>; |
| |
| #endif // _LIBCPP_STD_VER > 11 |
| |
| #if _LIBCPP_STD_VER > 11 |
| template<class _T1, class _T2 = _T1> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _T1 exchange(_T1& __obj, _T2 && __new_value) |
| { |
| _T1 __old_value = _VSTD::move(__obj); |
| __obj = _VSTD::forward<_T2>(__new_value); |
| return __old_value; |
| } |
| #endif // _LIBCPP_STD_VER > 11 |
| |
| #if _LIBCPP_STD_VER > 14 |
| |
| struct _LIBCPP_TYPE_VIS in_place_t { |
| explicit in_place_t() = default; |
| }; |
| #ifndef _LIBCPP_HAS_NO_INLINE_VARIABLES |
| inline |
| #endif |
| constexpr in_place_t in_place{}; |
| |
| template <class _Tp> |
| struct _LIBCPP_TYPE_VIS in_place_type_t { |
| explicit in_place_type_t() = default; |
| }; |
| template <class _Tp> |
| #ifndef _LIBCPP_HAS_NO_INLINE_VARIABLES |
| inline |
| #endif |
| constexpr in_place_type_t<_Tp> in_place_type{}; |
| |
| template <size_t _Idx> |
| struct _LIBCPP_TYPE_VIS in_place_index_t { |
| explicit in_place_index_t() = default; |
| }; |
| template <size_t _Idx> |
| #ifndef _LIBCPP_HAS_NO_INLINE_VARIABLES |
| inline |
| #endif |
| constexpr in_place_index_t<_Idx> in_place_index{}; |
| |
| template <class _Tp> struct __is_inplace_type_imp : false_type {}; |
| template <class _Tp> struct __is_inplace_type_imp<in_place_type_t<_Tp>> : true_type {}; |
| |
| template <class _Tp> |
| using __is_inplace_type = __is_inplace_type_imp<__uncvref_t<_Tp>>; |
| |
| #endif // _LIBCPP_STD_VER > 14 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_UTILITY |