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Diffstat (limited to 'libcxx/include/utility')
| -rw-r--r-- | libcxx/include/utility | 1619 |
1 files changed, 1619 insertions, 0 deletions
diff --git a/libcxx/include/utility b/libcxx/include/utility new file mode 100644 index 0000000000000..7ac322bfe7102 --- /dev/null +++ b/libcxx/include/utility @@ -0,0 +1,1619 @@ +// -*- C++ -*- +//===-------------------------- utility -----------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP_UTILITY +#define _LIBCPP_UTILITY + +/* + utility synopsis + +#include <initializer_list> + +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; + explicit(see-below) constexpr pair(); + explicit(see-below) pair(const T1& x, const T2& y); // constexpr in C++14 + template <class U, class V> explicit(see-below) pair(U&& x, V&& y); // constexpr in C++14 + template <class U, class V> explicit(see-below) pair(const pair<U, V>& p); // constexpr in C++14 + template <class U, class V> explicit(see-below) 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 { explicit piecewise_construct_t() = default; }; +inline constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); + +template <class T> struct tuple_size; +template <size_t I, class T> struct 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 <cstddef> +#include <cstring> +#include <cstdint> +#include <version> +#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 is defined in <type_traits>` + +// swap is defined in <type_traits> + +// move_if_noexcept + +template <class _Tp> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +#ifndef _LIBCPP_CXX03_LANG +typename conditional +< + !is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, + const _Tp&, + _Tp&& +>::type +#else // _LIBCPP_CXX03_LANG +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_TEMPLATE_VIS piecewise_construct_t { explicit piecewise_construct_t() = default; }; +#if defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_LIBRARY) +extern _LIBCPP_EXPORTED_FROM_ABI const piecewise_construct_t piecewise_construct;// = piecewise_construct_t(); +#else +/* _LIBCPP_INLINE_VAR */ constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); +#endif + +#if defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR) +template <class, class> +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_TEMPLATE_VIS pair +#if defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR) +: private __non_trivially_copyable_base<_T1, _T2> +#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 _LIBCPP_NODEBUG_TYPE = typename enable_if<_Val, bool>::type; + + struct _CheckArgs { + template <int&...> + static constexpr bool __enable_explicit_default() { + return is_default_constructible<_T1>::value + && is_default_constructible<_T2>::value + && !__enable_implicit_default<>(); + } + + template <int&...> + static constexpr bool __enable_implicit_default() { + return __is_implicitly_default_constructible<_T1>::value + && __is_implicitly_default_constructible<_T2>::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 _LIBCPP_NODEBUG_TYPE = 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 _LIBCPP_NODEBUG_TYPE = 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>::__enable_explicit_default() + > = false> + explicit _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR + pair() _NOEXCEPT_(is_nothrow_default_constructible<first_type>::value && + is_nothrow_default_constructible<second_type>::value) + : first(), second() {} + + template<bool _Dummy = true, _EnableB< + _CheckArgsDep<_Dummy>::__enable_implicit_default() + > = false> + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR + pair() _NOEXCEPT_(is_nothrow_default_constructible<first_type>::value && + is_nothrow_default_constructible<second_type>::value) + : 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) + _NOEXCEPT_(is_nothrow_copy_constructible<first_type>::value && + is_nothrow_copy_constructible<second_type>::value) + : 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) + _NOEXCEPT_(is_nothrow_copy_constructible<first_type>::value && + is_nothrow_copy_constructible<second_type>::value) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _U1>::value && + is_nothrow_constructible<second_type, _U2>::value)) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _U1>::value && + is_nothrow_constructible<second_type, _U2>::value)) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _U1 const&>::value && + is_nothrow_constructible<second_type, _U2 const&>::value)) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _U1 const&>::value && + is_nothrow_constructible<second_type, _U2 const&>::value)) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _U1&&>::value && + is_nothrow_constructible<second_type, _U2&&>::value)) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _U1&&>::value && + is_nothrow_constructible<second_type, _U2&&>::value)) + : 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) + _NOEXCEPT_((is_nothrow_constructible<first_type, _Args1...>::value && + is_nothrow_constructible<second_type, _Args2...>::value)) + : 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 +}; + +#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES +template<class _T1, class _T2> +pair(_T1, _T2) -> pair<_T1, _T2>; +#endif // _LIBCPP_HAS_NO_DEDUCTION_GUIDES + +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); +} + +template <class _Tp> +struct __unwrap_reference { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; + +template <class _Tp> +struct __unwrap_reference<reference_wrapper<_Tp> > { typedef _LIBCPP_NODEBUG_TYPE _Tp& type; }; + +#if _LIBCPP_STD_VER > 17 +template <class _Tp> +struct unwrap_reference : __unwrap_reference<_Tp> { }; + +template <class _Tp> +struct unwrap_ref_decay : unwrap_reference<typename decay<_Tp>::type> { }; +#endif // > C++17 + +template <class _Tp> +struct __unwrap_ref_decay +#if _LIBCPP_STD_VER > 17 + : unwrap_ref_decay<_Tp> +#else + : __unwrap_reference<typename decay<_Tp>::type> +#endif +{ }; + +#ifndef _LIBCPP_CXX03_LANG + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair<typename __unwrap_ref_decay<_T1>::type, typename __unwrap_ref_decay<_T2>::type> +make_pair(_T1&& __t1, _T2&& __t2) +{ + return pair<typename __unwrap_ref_decay<_T1>::type, typename __unwrap_ref_decay<_T2>::type> + (_VSTD::forward<_T1>(__t1), _VSTD::forward<_T2>(__t2)); +} + +#else // _LIBCPP_CXX03_LANG + +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_CXX03_LANG + +template <class _T1, class _T2> + struct _LIBCPP_TEMPLATE_VIS tuple_size<pair<_T1, _T2> > + : public integral_constant<size_t, 2> {}; + +template <size_t _Ip, class _T1, class _T2> +struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, pair<_T1, _T2> > +{ + static_assert(_Ip < 2, "Index out of bounds in std::tuple_element<std::pair<T1, T2>>"); +}; + +template <class _T1, class _T2> +struct _LIBCPP_TEMPLATE_VIS tuple_element<0, pair<_T1, _T2> > +{ + typedef _LIBCPP_NODEBUG_TYPE _T1 type; +}; + +template <class _T1, class _T2> +struct _LIBCPP_TEMPLATE_VIS tuple_element<1, pair<_T1, _T2> > +{ + typedef _LIBCPP_NODEBUG_TYPE _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_CXX03_LANG + 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_CXX03_LANG +}; + +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_CXX03_LANG + 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_CXX03_LANG +}; + +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_CXX03_LANG +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_CXX03_LANG + +#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_TEMPLATE_VIS 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 _LIBCPP_NODEBUG_TYPE = __make_integer_seq<integer_sequence, _Tp, _Ep>; + +#else + +template<typename _Tp, _Tp _Np> using __make_integer_sequence_unchecked _LIBCPP_NODEBUG_TYPE = + 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 _LIBCPP_NODEBUG_TYPE __make_integer_sequence_unchecked<_Tp, 0 <= _Ep ? _Ep : 0> type; +}; + +template <class _Tp, _Tp _Ep> +using __make_integer_sequence _LIBCPP_NODEBUG_TYPE = 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 _LIBCPP_CONSTEXPR_AFTER_CXX17 +_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; +}; +_LIBCPP_INLINE_VAR constexpr in_place_t in_place{}; + +template <class _Tp> +struct _LIBCPP_TEMPLATE_VIS in_place_type_t { + explicit in_place_type_t() = default; +}; +template <class _Tp> +_LIBCPP_INLINE_VAR 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> +_LIBCPP_INLINE_VAR 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>>; + +template <class _Tp> struct __is_inplace_index_imp : false_type {}; +template <size_t _Idx> struct __is_inplace_index_imp<in_place_index_t<_Idx>> : true_type {}; + +template <class _Tp> +using __is_inplace_index = __is_inplace_index_imp<__uncvref_t<_Tp>>; + +#endif // _LIBCPP_STD_VER > 14 + +template <class _Arg, class _Result> +struct _LIBCPP_TEMPLATE_VIS unary_function +{ + typedef _Arg argument_type; + typedef _Result result_type; +}; + +template <class _Size> +inline _LIBCPP_INLINE_VISIBILITY +_Size +__loadword(const void* __p) +{ + _Size __r; + std::memcpy(&__r, __p, sizeof(__r)); + return __r; +} + +// We use murmur2 when size_t is 32 bits, and cityhash64 when size_t +// is 64 bits. This is because cityhash64 uses 64bit x 64bit +// multiplication, which can be very slow on 32-bit systems. +template <class _Size, size_t = sizeof(_Size)*__CHAR_BIT__> +struct __murmur2_or_cityhash; + +template <class _Size> +struct __murmur2_or_cityhash<_Size, 32> +{ + inline _Size operator()(const void* __key, _Size __len) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK; +}; + +// murmur2 +template <class _Size> +_Size +__murmur2_or_cityhash<_Size, 32>::operator()(const void* __key, _Size __len) +{ + const _Size __m = 0x5bd1e995; + const _Size __r = 24; + _Size __h = __len; + const unsigned char* __data = static_cast<const unsigned char*>(__key); + for (; __len >= 4; __data += 4, __len -= 4) + { + _Size __k = __loadword<_Size>(__data); + __k *= __m; + __k ^= __k >> __r; + __k *= __m; + __h *= __m; + __h ^= __k; + } + switch (__len) + { + case 3: + __h ^= __data[2] << 16; + _LIBCPP_FALLTHROUGH(); + case 2: + __h ^= __data[1] << 8; + _LIBCPP_FALLTHROUGH(); + case 1: + __h ^= __data[0]; + __h *= __m; + } + __h ^= __h >> 13; + __h *= __m; + __h ^= __h >> 15; + return __h; +} + +template <class _Size> +struct __murmur2_or_cityhash<_Size, 64> +{ + inline _Size operator()(const void* __key, _Size __len) _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK; + + private: + // Some primes between 2^63 and 2^64. + static const _Size __k0 = 0xc3a5c85c97cb3127ULL; + static const _Size __k1 = 0xb492b66fbe98f273ULL; + static const _Size __k2 = 0x9ae16a3b2f90404fULL; + static const _Size __k3 = 0xc949d7c7509e6557ULL; + + static _Size __rotate(_Size __val, int __shift) { + return __shift == 0 ? __val : ((__val >> __shift) | (__val << (64 - __shift))); + } + + static _Size __rotate_by_at_least_1(_Size __val, int __shift) { + return (__val >> __shift) | (__val << (64 - __shift)); + } + + static _Size __shift_mix(_Size __val) { + return __val ^ (__val >> 47); + } + + static _Size __hash_len_16(_Size __u, _Size __v) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK + { + const _Size __mul = 0x9ddfea08eb382d69ULL; + _Size __a = (__u ^ __v) * __mul; + __a ^= (__a >> 47); + _Size __b = (__v ^ __a) * __mul; + __b ^= (__b >> 47); + __b *= __mul; + return __b; + } + + static _Size __hash_len_0_to_16(const char* __s, _Size __len) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK + { + if (__len > 8) { + const _Size __a = __loadword<_Size>(__s); + const _Size __b = __loadword<_Size>(__s + __len - 8); + return __hash_len_16(__a, __rotate_by_at_least_1(__b + __len, __len)) ^ __b; + } + if (__len >= 4) { + const uint32_t __a = __loadword<uint32_t>(__s); + const uint32_t __b = __loadword<uint32_t>(__s + __len - 4); + return __hash_len_16(__len + (__a << 3), __b); + } + if (__len > 0) { + const unsigned char __a = __s[0]; + const unsigned char __b = __s[__len >> 1]; + const unsigned char __c = __s[__len - 1]; + const uint32_t __y = static_cast<uint32_t>(__a) + + (static_cast<uint32_t>(__b) << 8); + const uint32_t __z = __len + (static_cast<uint32_t>(__c) << 2); + return __shift_mix(__y * __k2 ^ __z * __k3) * __k2; + } + return __k2; + } + + static _Size __hash_len_17_to_32(const char *__s, _Size __len) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK + { + const _Size __a = __loadword<_Size>(__s) * __k1; + const _Size __b = __loadword<_Size>(__s + 8); + const _Size __c = __loadword<_Size>(__s + __len - 8) * __k2; + const _Size __d = __loadword<_Size>(__s + __len - 16) * __k0; + return __hash_len_16(__rotate(__a - __b, 43) + __rotate(__c, 30) + __d, + __a + __rotate(__b ^ __k3, 20) - __c + __len); + } + + // Return a 16-byte hash for 48 bytes. Quick and dirty. + // Callers do best to use "random-looking" values for a and b. + static pair<_Size, _Size> __weak_hash_len_32_with_seeds( + _Size __w, _Size __x, _Size __y, _Size __z, _Size __a, _Size __b) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK + { + __a += __w; + __b = __rotate(__b + __a + __z, 21); + const _Size __c = __a; + __a += __x; + __a += __y; + __b += __rotate(__a, 44); + return pair<_Size, _Size>(__a + __z, __b + __c); + } + + // Return a 16-byte hash for s[0] ... s[31], a, and b. Quick and dirty. + static pair<_Size, _Size> __weak_hash_len_32_with_seeds( + const char* __s, _Size __a, _Size __b) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK + { + return __weak_hash_len_32_with_seeds(__loadword<_Size>(__s), + __loadword<_Size>(__s + 8), + __loadword<_Size>(__s + 16), + __loadword<_Size>(__s + 24), + __a, + __b); + } + + // Return an 8-byte hash for 33 to 64 bytes. + static _Size __hash_len_33_to_64(const char *__s, size_t __len) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK + { + _Size __z = __loadword<_Size>(__s + 24); + _Size __a = __loadword<_Size>(__s) + + (__len + __loadword<_Size>(__s + __len - 16)) * __k0; + _Size __b = __rotate(__a + __z, 52); + _Size __c = __rotate(__a, 37); + __a += __loadword<_Size>(__s + 8); + __c += __rotate(__a, 7); + __a += __loadword<_Size>(__s + 16); + _Size __vf = __a + __z; + _Size __vs = __b + __rotate(__a, 31) + __c; + __a = __loadword<_Size>(__s + 16) + __loadword<_Size>(__s + __len - 32); + __z += __loadword<_Size>(__s + __len - 8); + __b = __rotate(__a + __z, 52); + __c = __rotate(__a, 37); + __a += __loadword<_Size>(__s + __len - 24); + __c += __rotate(__a, 7); + __a += __loadword<_Size>(__s + __len - 16); + _Size __wf = __a + __z; + _Size __ws = __b + __rotate(__a, 31) + __c; + _Size __r = __shift_mix((__vf + __ws) * __k2 + (__wf + __vs) * __k0); + return __shift_mix(__r * __k0 + __vs) * __k2; + } +}; + +// cityhash64 +template <class _Size> +_Size +__murmur2_or_cityhash<_Size, 64>::operator()(const void* __key, _Size __len) +{ + const char* __s = static_cast<const char*>(__key); + if (__len <= 32) { + if (__len <= 16) { + return __hash_len_0_to_16(__s, __len); + } else { + return __hash_len_17_to_32(__s, __len); + } + } else if (__len <= 64) { + return __hash_len_33_to_64(__s, __len); + } + + // For strings over 64 bytes we hash the end first, and then as we + // loop we keep 56 bytes of state: v, w, x, y, and z. + _Size __x = __loadword<_Size>(__s + __len - 40); + _Size __y = __loadword<_Size>(__s + __len - 16) + + __loadword<_Size>(__s + __len - 56); + _Size __z = __hash_len_16(__loadword<_Size>(__s + __len - 48) + __len, + __loadword<_Size>(__s + __len - 24)); + pair<_Size, _Size> __v = __weak_hash_len_32_with_seeds(__s + __len - 64, __len, __z); + pair<_Size, _Size> __w = __weak_hash_len_32_with_seeds(__s + __len - 32, __y + __k1, __x); + __x = __x * __k1 + __loadword<_Size>(__s); + + // Decrease len to the nearest multiple of 64, and operate on 64-byte chunks. + __len = (__len - 1) & ~static_cast<_Size>(63); + do { + __x = __rotate(__x + __y + __v.first + __loadword<_Size>(__s + 8), 37) * __k1; + __y = __rotate(__y + __v.second + __loadword<_Size>(__s + 48), 42) * __k1; + __x ^= __w.second; + __y += __v.first + __loadword<_Size>(__s + 40); + __z = __rotate(__z + __w.first, 33) * __k1; + __v = __weak_hash_len_32_with_seeds(__s, __v.second * __k1, __x + __w.first); + __w = __weak_hash_len_32_with_seeds(__s + 32, __z + __w.second, + __y + __loadword<_Size>(__s + 16)); + std::swap(__z, __x); + __s += 64; + __len -= 64; + } while (__len != 0); + return __hash_len_16( + __hash_len_16(__v.first, __w.first) + __shift_mix(__y) * __k1 + __z, + __hash_len_16(__v.second, __w.second) + __x); +} + +template <class _Tp, size_t = sizeof(_Tp) / sizeof(size_t)> +struct __scalar_hash; + +template <class _Tp> +struct __scalar_hash<_Tp, 0> + : public unary_function<_Tp, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp __v) const _NOEXCEPT + { + union + { + _Tp __t; + size_t __a; + } __u; + __u.__a = 0; + __u.__t = __v; + return __u.__a; + } +}; + +template <class _Tp> +struct __scalar_hash<_Tp, 1> + : public unary_function<_Tp, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp __v) const _NOEXCEPT + { + union + { + _Tp __t; + size_t __a; + } __u; + __u.__t = __v; + return __u.__a; + } +}; + +template <class _Tp> +struct __scalar_hash<_Tp, 2> + : public unary_function<_Tp, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp __v) const _NOEXCEPT + { + union + { + _Tp __t; + struct + { + size_t __a; + size_t __b; + } __s; + } __u; + __u.__t = __v; + return __murmur2_or_cityhash<size_t>()(&__u, sizeof(__u)); + } +}; + +template <class _Tp> +struct __scalar_hash<_Tp, 3> + : public unary_function<_Tp, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp __v) const _NOEXCEPT + { + union + { + _Tp __t; + struct + { + size_t __a; + size_t __b; + size_t __c; + } __s; + } __u; + __u.__t = __v; + return __murmur2_or_cityhash<size_t>()(&__u, sizeof(__u)); + } +}; + +template <class _Tp> +struct __scalar_hash<_Tp, 4> + : public unary_function<_Tp, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp __v) const _NOEXCEPT + { + union + { + _Tp __t; + struct + { + size_t __a; + size_t __b; + size_t __c; + size_t __d; + } __s; + } __u; + __u.__t = __v; + return __murmur2_or_cityhash<size_t>()(&__u, sizeof(__u)); + } +}; + +struct _PairT { + size_t first; + size_t second; +}; + +_LIBCPP_INLINE_VISIBILITY +inline size_t __hash_combine(size_t __lhs, size_t __rhs) _NOEXCEPT { + typedef __scalar_hash<_PairT> _HashT; + const _PairT __p = {__lhs, __rhs}; + return _HashT()(__p); +} + +template<class _Tp> +struct _LIBCPP_TEMPLATE_VIS hash<_Tp*> + : public unary_function<_Tp*, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp* __v) const _NOEXCEPT + { + union + { + _Tp* __t; + size_t __a; + } __u; + __u.__t = __v; + return __murmur2_or_cityhash<size_t>()(&__u, sizeof(__u)); + } +}; + + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<bool> + : public unary_function<bool, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(bool __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<char> + : public unary_function<char, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(char __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<signed char> + : public unary_function<signed char, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(signed char __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<unsigned char> + : public unary_function<unsigned char, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(unsigned char __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<char16_t> + : public unary_function<char16_t, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(char16_t __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<char32_t> + : public unary_function<char32_t, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(char32_t __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +#endif // _LIBCPP_HAS_NO_UNICODE_CHARS + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<wchar_t> + : public unary_function<wchar_t, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(wchar_t __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<short> + : public unary_function<short, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(short __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<unsigned short> + : public unary_function<unsigned short, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(unsigned short __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<int> + : public unary_function<int, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(int __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<unsigned int> + : public unary_function<unsigned int, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(unsigned int __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<long> + : public unary_function<long, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(long __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<unsigned long> + : public unary_function<unsigned long, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(unsigned long __v) const _NOEXCEPT {return static_cast<size_t>(__v);} +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<long long> + : public __scalar_hash<long long> +{ +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<unsigned long long> + : public __scalar_hash<unsigned long long> +{ +}; + +#ifndef _LIBCPP_HAS_NO_INT128 + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<__int128_t> + : public __scalar_hash<__int128_t> +{ +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<__uint128_t> + : public __scalar_hash<__uint128_t> +{ +}; + +#endif + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<float> + : public __scalar_hash<float> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(float __v) const _NOEXCEPT + { + // -0.0 and 0.0 should return same hash + if (__v == 0.0f) + return 0; + return __scalar_hash<float>::operator()(__v); + } +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<double> + : public __scalar_hash<double> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(double __v) const _NOEXCEPT + { + // -0.0 and 0.0 should return same hash + if (__v == 0.0) + return 0; + return __scalar_hash<double>::operator()(__v); + } +}; + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<long double> + : public __scalar_hash<long double> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(long double __v) const _NOEXCEPT + { + // -0.0 and 0.0 should return same hash + if (__v == 0.0L) + return 0; +#if defined(__i386__) + // Zero out padding bits + union + { + long double __t; + struct + { + size_t __a; + size_t __b; + size_t __c; + size_t __d; + } __s; + } __u; + __u.__s.__a = 0; + __u.__s.__b = 0; + __u.__s.__c = 0; + __u.__s.__d = 0; + __u.__t = __v; + return __u.__s.__a ^ __u.__s.__b ^ __u.__s.__c ^ __u.__s.__d; +#elif defined(__x86_64__) + // Zero out padding bits + union + { + long double __t; + struct + { + size_t __a; + size_t __b; + } __s; + } __u; + __u.__s.__a = 0; + __u.__s.__b = 0; + __u.__t = __v; + return __u.__s.__a ^ __u.__s.__b; +#else + return __scalar_hash<long double>::operator()(__v); +#endif + } +}; + +#if _LIBCPP_STD_VER > 11 + +template <class _Tp, bool = is_enum<_Tp>::value> +struct _LIBCPP_TEMPLATE_VIS __enum_hash + : public unary_function<_Tp, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(_Tp __v) const _NOEXCEPT + { + typedef typename underlying_type<_Tp>::type type; + return hash<type>{}(static_cast<type>(__v)); + } +}; +template <class _Tp> +struct _LIBCPP_TEMPLATE_VIS __enum_hash<_Tp, false> { + __enum_hash() = delete; + __enum_hash(__enum_hash const&) = delete; + __enum_hash& operator=(__enum_hash const&) = delete; +}; + +template <class _Tp> +struct _LIBCPP_TEMPLATE_VIS hash : public __enum_hash<_Tp> +{ +}; +#endif + +#if _LIBCPP_STD_VER > 14 + +template <> +struct _LIBCPP_TEMPLATE_VIS hash<nullptr_t> + : public unary_function<nullptr_t, size_t> +{ + _LIBCPP_INLINE_VISIBILITY + size_t operator()(nullptr_t) const _NOEXCEPT { + return 662607004ull; + } +}; +#endif + +#ifndef _LIBCPP_CXX03_LANG +template <class _Key, class _Hash> +using __check_hash_requirements _LIBCPP_NODEBUG_TYPE = integral_constant<bool, + is_copy_constructible<_Hash>::value && + is_move_constructible<_Hash>::value && + __invokable_r<size_t, _Hash, _Key const&>::value +>; + +template <class _Key, class _Hash = std::hash<_Key> > +using __has_enabled_hash _LIBCPP_NODEBUG_TYPE = integral_constant<bool, + __check_hash_requirements<_Key, _Hash>::value && + is_default_constructible<_Hash>::value +>; + +#if _LIBCPP_STD_VER > 14 +template <class _Type, class> +using __enable_hash_helper_imp _LIBCPP_NODEBUG_TYPE = _Type; + +template <class _Type, class ..._Keys> +using __enable_hash_helper _LIBCPP_NODEBUG_TYPE = __enable_hash_helper_imp<_Type, + typename enable_if<__all<__has_enabled_hash<_Keys>::value...>::value>::type +>; +#else +template <class _Type, class ...> +using __enable_hash_helper _LIBCPP_NODEBUG_TYPE = _Type; +#endif + +#endif // !_LIBCPP_CXX03_LANG + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_UTILITY |