forked from OSchip/llvm-project
1623 lines
48 KiB
C++
1623 lines
48 KiB
C++
// -*- 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;
|
|
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 { };
|
|
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
|
|
|
|
|
|
template <class _ForwardIterator1, class _ForwardIterator2>
|
|
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_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 _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
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_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 { };
|
|
#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 <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 _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>::template __enable_default<_T1, _T2>()
|
|
> = 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
|