| // -*- 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 |