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utility
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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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 <typename T>
[[nodiscard]] constexpr
auto forward_like(auto&& x) noexcept -> see below; // since C++23
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 T, class U> constexpr bool cmp_equal(T t, U u) noexcept; // C++20
template<class T, class U> constexpr bool cmp_not_equal(T t, U u) noexcept; // C++20
template<class T, class U> constexpr bool cmp_less(T t, U u) noexcept; // C++20
template<class T, class U> constexpr bool cmp_greater(T t, U u) noexcept; // C++20
template<class T, class U> constexpr bool cmp_less_equal(T t, U u) noexcept; // C++20
template<class T, class U> constexpr bool cmp_greater_equal(T t, U u) noexcept; // C++20
template<class R, class T> constexpr bool in_range(T t) noexcept; // C++20
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 = T1, class V = T2> explicit(see-below) pair(U&&, V&&); // constexpr in C++14
template <class U, class V> constexpr explicit(see-below) pair(pair<U, V>&); // since C++23
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 U, class V>
constexpr explicit(see-below) pair(const pair<U, V>&&); // since C++23
template <pair-like P> constexpr explicit(see-below) pair(P&&); // since C++23
template <class... Args1, class... Args2>
pair(piecewise_construct_t, tuple<Args1...> first_args, // constexpr in C++20
tuple<Args2...> second_args);
constexpr const pair& operator=(const pair& p) const; // since C++23
template <class U, class V> pair& operator=(const pair<U, V>& p); // constexpr in C++20
template <class U, class V>
constexpr const pair& operator=(const pair<U, V>& p) const; // since C++23
pair& operator=(pair&& p) noexcept(is_nothrow_move_assignable<T1>::value &&
is_nothrow_move_assignable<T2>::value); // constexpr in C++20
constexpr const pair& operator=(pair&& p) const; // since C++23
template <class U, class V> pair& operator=(pair<U, V>&& p); // constexpr in C++20
template <class U, class V>
constexpr const pair& operator=(pair<U, V>&& p) const; // since C++23
template <pair-like P> constexpr pair& operator=(P&&); // since C++23
template <pair-like P> constexpr const pair& operator=(P&&) const; // since C++23
void swap(pair& p) noexcept(is_nothrow_swappable_v<T1> &&
is_nothrow_swappable_v<T2>); // constexpr in C++20
constexpr void swap(const pair& p) const noexcept(see below); // since C++23
};
template<class T1, class T2, class U1, class U2, template<class> class TQual, template<class> class UQual>
struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual>; // since C++23
template<class T1, class T2, class U1, class U2>
struct common_type<pair<T1, T2>, pair<U1, U2>>; // since C++23
template<class T1, class T2> pair(T1, T2) -> pair<T1, T2>;
template <class T1, class T2, class U1, class U2>
bool operator==(const pair<T1,T2>&, const pair<U1,U2>&); // constexpr in C++14
template <class T1, class T2, class U1, class U2>
bool operator!=(const pair<T1,T2>&, const pair<U1,U2>&); // constexpr in C++14, removed in C++20
template <class T1, class T2, class U1, class U2>
bool operator< (const pair<T1,T2>&, const pair<U1,U2>&); // constexpr in C++14, removed in C++20
template <class T1, class T2, class U1, class U2>
bool operator> (const pair<T1,T2>&, const pair<U1,U2>&); // constexpr in C++14, removed in C++20
template <class T1, class T2, class U1, class U2>
bool operator>=(const pair<T1,T2>&, const pair<U1,U2>&); // constexpr in C++14, removed in C++20
template <class T1, class T2, class U1, class U2>
bool operator<=(const pair<T1,T2>&, const pair<U1,U2>&); // constexpr in C++14, removed in C++20
template <class T1, class T2, class U1, class U2>
constexpr common_comparison_type_t<synth-three-way-result<T1,U1>,
synth-three-way-result<T2,U2>>
operator<=>(const pair<T1,T2>&, const pair<U1,U2>&); // C++20
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))); // constexpr in C++20
template<class T1, class T2> // since C++23
constexpr void swap(const pair<T1, T2>& x, const 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>
constexpr T exchange(T& obj, U&& new_value) // constexpr in C++17, noexcept in C++23
noexcept(is_nothrow_move_constructible<T>::value && is_nothrow_assignable<T&, U>::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{};
// [utility.underlying], to_underlying
template <class T>
constexpr underlying_type_t<T> to_underlying( T value ) noexcept; // C++23
} // std
*/
#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
# include <__cxx03/utility>
#else
# include <__config>
# include <__utility/declval.h>
# include <__utility/forward.h>
# include <__utility/move.h>
# include <__utility/pair.h>
# include <__utility/piecewise_construct.h>
# include <__utility/rel_ops.h>
# include <__utility/swap.h>
# if _LIBCPP_STD_VER >= 14
# include <__utility/exchange.h>
# include <__utility/integer_sequence.h>
# endif
# if _LIBCPP_STD_VER >= 17
# include <__utility/as_const.h>
# include <__utility/in_place.h>
# endif
# if _LIBCPP_STD_VER >= 20
# include <__utility/cmp.h>
# endif
# if _LIBCPP_STD_VER >= 23
# include <__utility/forward_like.h>
# include <__utility/to_underlying.h>
# include <__utility/unreachable.h>
# endif
# if _LIBCPP_STD_VER >= 26
# include <__variant/monostate.h>
# endif
# include <version>
// standard-mandated includes
// [utility.syn]
# include <compare>
# include <initializer_list>
// [tuple.creation]
# include <__tuple/ignore.h>
// [tuple.helper]
# include <__tuple/tuple_element.h>
# include <__tuple/tuple_size.h>
# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
# endif
# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <limits>
# endif
# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <cstddef>
# include <cstdlib>
# include <iosfwd>
# include <type_traits>
# endif
#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
#endif // _LIBCPP_UTILITY