// -*- 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 */ #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 #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 <cstdlib> # include <iosfwd> # include <type_traits> #endif #endif // _LIBCPP_UTILITY
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