mirror of
https://github.com/ziglang/zig.git
synced 2024-12-03 10:28:48 +00:00
935 lines
39 KiB
C++
Vendored
935 lines
39 KiB
C++
Vendored
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_MEMORY
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#define _LIBCPP_MEMORY
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/*
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memory synopsis
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namespace std
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{
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struct allocator_arg_t { };
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inline constexpr allocator_arg_t allocator_arg = allocator_arg_t();
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template <class T, class Alloc> struct uses_allocator;
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template <class Ptr>
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struct pointer_traits
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{
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typedef Ptr pointer;
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typedef <details> element_type;
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typedef <details> difference_type;
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template <class U> using rebind = <details>;
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static pointer pointer_to(<details>);
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};
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template <class T>
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struct pointer_traits<T*>
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{
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typedef T* pointer;
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typedef T element_type;
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typedef ptrdiff_t difference_type;
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template <class U> using rebind = U*;
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static pointer pointer_to(<details>) noexcept; // constexpr in C++20
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};
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template <class T> constexpr T* to_address(T* p) noexcept; // C++20
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template <class Ptr> constexpr auto to_address(const Ptr& p) noexcept; // C++20
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template <class Alloc>
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struct allocator_traits
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{
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typedef Alloc allocator_type;
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typedef typename allocator_type::value_type
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value_type;
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typedef Alloc::pointer | value_type* pointer;
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typedef Alloc::const_pointer
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| pointer_traits<pointer>::rebind<const value_type>
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const_pointer;
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typedef Alloc::void_pointer
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| pointer_traits<pointer>::rebind<void>
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void_pointer;
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typedef Alloc::const_void_pointer
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| pointer_traits<pointer>::rebind<const void>
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const_void_pointer;
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typedef Alloc::difference_type
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| pointer_traits<pointer>::difference_type
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difference_type;
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typedef Alloc::size_type
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| make_unsigned<difference_type>::type
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size_type;
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typedef Alloc::propagate_on_container_copy_assignment
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| false_type propagate_on_container_copy_assignment;
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typedef Alloc::propagate_on_container_move_assignment
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| false_type propagate_on_container_move_assignment;
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typedef Alloc::propagate_on_container_swap
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| false_type propagate_on_container_swap;
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typedef Alloc::is_always_equal
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| is_empty is_always_equal;
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template <class T> using rebind_alloc = Alloc::rebind<T>::other | Alloc<T, Args...>;
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template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>;
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static pointer allocate(allocator_type& a, size_type n); // constexpr and [[nodiscard]] in C++20
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static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // constexpr and [[nodiscard]] in C++20
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static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; // constexpr in C++20
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template <class T, class... Args>
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static void construct(allocator_type& a, T* p, Args&&... args); // constexpr in C++20
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template <class T>
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static void destroy(allocator_type& a, T* p); // constexpr in C++20
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static size_type max_size(const allocator_type& a); // noexcept in C++14, constexpr in C++20
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static allocator_type select_on_container_copy_construction(const allocator_type& a); // constexpr in C++20
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};
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template<class Pointer>
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struct allocation_result {
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Pointer ptr;
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size_t count;
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}; // since C++23
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template<class Allocator>
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[[nodiscard]] constexpr allocation_result<typename allocator_traits<Allocator>::pointer>
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allocate_at_least(Allocator& a, size_t n); // since C++23
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template <>
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class allocator<void> // removed in C++20
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{
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public:
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typedef void* pointer;
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typedef const void* const_pointer;
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typedef void value_type;
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template <class _Up> struct rebind {typedef allocator<_Up> other;};
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};
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template <class T>
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class allocator
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{
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public:
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef T* pointer; // deprecated in C++17, removed in C++20
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typedef const T* const_pointer; // deprecated in C++17, removed in C++20
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typedef typename add_lvalue_reference<T>::type
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reference; // deprecated in C++17, removed in C++20
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typedef typename add_lvalue_reference<const T>::type
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const_reference; // deprecated in C++17, removed in C++20
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typedef T value_type;
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template <class U> struct rebind {typedef allocator<U> other;}; // deprecated in C++17, removed in C++20
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typedef true_type propagate_on_container_move_assignment;
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typedef true_type is_always_equal;
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constexpr allocator() noexcept; // constexpr in C++20
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constexpr allocator(const allocator&) noexcept; // constexpr in C++20
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template <class U>
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constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20
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~allocator(); // constexpr in C++20
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pointer address(reference x) const noexcept; // deprecated in C++17, removed in C++20
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const_pointer address(const_reference x) const noexcept; // deprecated in C++17, removed in C++20
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T* allocate(size_t n, const void* hint); // deprecated in C++17, removed in C++20
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T* allocate(size_t n); // constexpr in C++20
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void deallocate(T* p, size_t n) noexcept; // constexpr in C++20
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size_type max_size() const noexcept; // deprecated in C++17, removed in C++20
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template<class U, class... Args>
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void construct(U* p, Args&&... args); // deprecated in C++17, removed in C++20
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template <class U>
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void destroy(U* p); // deprecated in C++17, removed in C++20
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};
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template <class T, class U>
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bool operator==(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20
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template <class T, class U>
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bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20
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template <class OutputIterator, class T>
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class raw_storage_iterator // deprecated in C++17, removed in C++20
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: public iterator<output_iterator_tag, void, void, void, void> // until C++17
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{
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public:
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type; // until C++20
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typedef ptrdiff_t difference_type; // since C++20
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typedef void pointer;
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typedef void reference;
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explicit raw_storage_iterator(OutputIterator x);
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raw_storage_iterator& operator*();
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raw_storage_iterator& operator=(const T& element);
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raw_storage_iterator& operator++();
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raw_storage_iterator operator++(int);
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};
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template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept;
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template <class T> void return_temporary_buffer(T* p) noexcept;
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template <class T> T* addressof(T& r) noexcept;
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template <class T> T* addressof(const T&& r) noexcept = delete;
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template <class InputIterator, class ForwardIterator>
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ForwardIterator
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uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result);
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namespace ranges {
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template<class InputIterator, class OutputIterator>
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using uninitialized_copy_result = in_out_result<InputIterator, OutputIterator>; // since C++20
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template<input_iterator InputIterator, sentinel-for<InputIterator> Sentinel1, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<OutputIterator> Sentinel2>
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requires constructible_from<iter_value_t<OutputIterator>, iter_reference_t<InputIterator>>
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uninitialized_copy_result<InputIterator, OutputIterator>
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uninitialized_copy(InputIterator ifirst, Sentinel1 ilast, OutputIterator ofirst, Sentinel2 olast); // since C++20
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template<input_range InputRange, nothrow-forward-range OutputRange>
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requires constructible_from<range_value_t<OutputRange>, range_reference_t<InputRange>>
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uninitialized_copy_result<borrowed_iterator_t<InputRange>, borrowed_iterator_t<OutputRange>>
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uninitialized_copy(InputRange&& in_range, OutputRange&& out_range); // since C++20
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}
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template <class InputIterator, class Size, class ForwardIterator>
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ForwardIterator
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uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result);
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namespace ranges {
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template<class InputIterator, class OutputIterator>
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using uninitialized_copy_n_result = in_out_result<InputIterator, OutputIterator>; // since C++20
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template<input_iterator InputIterator, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<OutputIterator> Sentinel>
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requires constructible_from<iter_value_t<OutputIterator>, iter_reference_t<InputIterator>>
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uninitialized_copy_n_result<InputIterator, OutputIterator>
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uninitialized_copy_n(InputIterator ifirst, iter_difference_t<InputIterator> n, OutputIterator ofirst, Sentinel olast); // since C++20
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}
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template <class ForwardIterator, class T>
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void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x);
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namespace ranges {
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template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel, class T>
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requires constructible_from<iter_value_t<ForwardIterator>, const T&>
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ForwardIterator uninitialized_fill(ForwardIterator first, Sentinel last, const T& x); // since C++20
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template <nothrow-forward-range ForwardRange, class T>
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requires constructible_from<range_value_t<ForwardRange>, const T&>
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borrowed_iterator_t<ForwardRange> uninitialized_fill(ForwardRange&& range, const T& x); // since C++20
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}
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template <class ForwardIterator, class Size, class T>
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ForwardIterator
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uninitialized_fill_n(ForwardIterator first, Size n, const T& x);
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namespace ranges {
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template <nothrow-forward-iterator ForwardIterator, class T>
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requires constructible_from<iter_value_t<ForwardIterator>, const T&>
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ForwardIterator uninitialized_fill_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20
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}
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template <class T, class ...Args>
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constexpr T* construct_at(T* location, Args&& ...args); // since C++20
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namespace ranges {
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template<class T, class... Args>
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constexpr T* construct_at(T* location, Args&&... args); // since C++20
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}
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template <class T>
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void destroy_at(T* location); // constexpr in C++20
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namespace ranges {
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template<destructible T>
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constexpr void destroy_at(T* location) noexcept; // since C++20
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}
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template <class ForwardIterator>
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void destroy(ForwardIterator first, ForwardIterator last); // constexpr in C++20
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namespace ranges {
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template<nothrow-input-iterator InputIterator, nothrow-sentinel-for<InputIterator> Sentinel>
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requires destructible<iter_value_t<InputIterator>>
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constexpr InputIterator destroy(InputIterator first, Sentinel last) noexcept; // since C++20
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template<nothrow-input-range InputRange>
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requires destructible<range_value_t<InputRange>>
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constexpr borrowed_iterator_t<InputRange> destroy(InputRange&& range) noexcept; // since C++20
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}
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template <class ForwardIterator, class Size>
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ForwardIterator destroy_n(ForwardIterator first, Size n); // constexpr in C++20
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namespace ranges {
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template<nothrow-input-iterator InputIterator>
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requires destructible<iter_value_t<InputIterator>>
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constexpr InputIterator destroy_n(InputIterator first, iter_difference_t<InputIterator> n) noexcept; // since C++20
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}
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template <class InputIterator, class ForwardIterator>
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ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result);
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namespace ranges {
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template<class InputIterator, class OutputIterator>
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using uninitialized_move_result = in_out_result<InputIterator, OutputIterator>; // since C++20
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template <input_iterator InputIterator, sentinel_for<InputIterator> Sentinel1, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<O> Sentinel2>
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requires constructible_from<iter_value_t<OutputIterator>, iter_rvalue_reference_t<InputIterator>>
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uninitialized_move_result<InputIterator, OutputIterator>
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uninitialized_move(InputIterator ifirst, Sentinel1 ilast, OutputIterator ofirst, Sentinel2 olast); // since C++20
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template<input_range InputRange, nothrow-forward-range OutputRange>
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requires constructible_from<range_value_t<OutputRange>, range_rvalue_reference_t<InputRange>>
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uninitialized_move_result<borrowed_iterator_t<InputRange>, borrowed_iterator_t<OutputRange>>
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uninitialized_move(InputRange&& in_range, OutputRange&& out_range); // since C++20
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}
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template <class InputIterator, class Size, class ForwardIterator>
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pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result);
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namespace ranges {
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template<class InputIterator, class OutputIterator>
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using uninitialized_move_n_result = in_out_result<InputIterator, OutputIterator>; // since C++20
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template<input_iterator InputIterator, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<OutputIterator> Sentinel>
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requires constructible_from<iter_value_t<OutputIterator>, iter_rvalue_reference_t<InputIterator>>
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uninitialized_move_n_result<InputIterator, OutputIterator>
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uninitialized_move_n(InputIterator ifirst, iter_difference_t<InputIterator> n, OutputIterator ofirst, Sentinel olast); // since C++20
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}
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template <class ForwardIterator>
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void uninitialized_value_construct(ForwardIterator first, ForwardIterator last);
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namespace ranges {
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template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel>
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requires default_initializable<iter_value_t<ForwardIterator>>
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ForwardIterator uninitialized_value_construct(ForwardIterator first, Sentinel last); // since C++20
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template <nothrow-forward-range ForwardRange>
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requires default_initializable<range_value_t<ForwardRange>>
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borrowed_iterator_t<ForwardRange> uninitialized_value_construct(ForwardRange&& r); // since C++20
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}
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template <class ForwardIterator, class Size>
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ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n);
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namespace ranges {
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template <nothrow-forward-iterator ForwardIterator>
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requires default_initializable<iter_value_t<ForwardIterator>>
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ForwardIterator uninitialized_value_construct_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20
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}
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template <class ForwardIterator>
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void uninitialized_default_construct(ForwardIterator first, ForwardIterator last);
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namespace ranges {
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template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel>
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requires default_initializable<iter_value_t<ForwardIterator>>
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ForwardIterator uninitialized_default_construct(ForwardIterator first, Sentinel last); // since C++20
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template <nothrow-forward-range ForwardRange>
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requires default_initializable<range_value_t<ForwardRange>>
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borrowed_iterator_t<ForwardRange> uninitialized_default_construct(ForwardRange&& r); // since C++20
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}
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template <class ForwardIterator, class Size>
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ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n);
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namespace ranges {
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template <nothrow-forward-iterator ForwardIterator>
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requires default_initializable<iter_value_t<ForwardIterator>>
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ForwardIterator uninitialized_default_construct_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20
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}
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template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17
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template<class X>
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class auto_ptr // deprecated in C++11, removed in C++17
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{
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public:
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typedef X element_type;
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explicit auto_ptr(X* p =0) throw();
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auto_ptr(auto_ptr&) throw();
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template<class Y> auto_ptr(auto_ptr<Y>&) throw();
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auto_ptr& operator=(auto_ptr&) throw();
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template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw();
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auto_ptr& operator=(auto_ptr_ref<X> r) throw();
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~auto_ptr() throw();
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typename add_lvalue_reference<X>::type operator*() const throw();
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X* operator->() const throw();
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X* get() const throw();
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X* release() throw();
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void reset(X* p =0) throw();
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auto_ptr(auto_ptr_ref<X>) throw();
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template<class Y> operator auto_ptr_ref<Y>() throw();
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template<class Y> operator auto_ptr<Y>() throw();
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};
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template <class T>
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struct default_delete
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{
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constexpr default_delete() noexcept = default;
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template <class U> constexpr default_delete(const default_delete<U>&) noexcept; // constexpr since C++23
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constexpr void operator()(T*) const noexcept; // constexpr since C++23
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};
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template <class T>
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struct default_delete<T[]>
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{
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constexpr default_delete() noexcept = default;
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template <class U> constexpr default_delete(const default_delete <U[]>&) noexcept; // constexpr since C++23
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constexpr void operator()(T*) const noexcept; // constexpr since C++23
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template <class U> void operator()(U*) const = delete;
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};
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template <class T, class D = default_delete<T>>
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class unique_ptr
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{
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public:
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typedef see below pointer;
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typedef T element_type;
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typedef D deleter_type;
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// constructors
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constexpr unique_ptr() noexcept;
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constexpr explicit unique_ptr(pointer p) noexcept; // constexpr since C++23
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constexpr unique_ptr(pointer p, see below d1) noexcept; // constexpr since C++23
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constexpr unique_ptr(pointer p, see below d2) noexcept; // constexpr since C++23
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constexpr unique_ptr(unique_ptr&& u) noexcept; // constexpr since C++23
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constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
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template <class U, class E>
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constexpr unique_ptr(unique_ptr<U, E>&& u) noexcept; // constexpr since C++23
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template <class U>
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unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17
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// destructor
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constexpr ~unique_ptr(); // constexpr since C++23
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// assignment
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constexpr unique_ptr& operator=(unique_ptr&& u) noexcept; // constexpr since C++23
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template <class U, class E>
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constexpr unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; // constexpr since C++23
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constexpr unique_ptr& operator=(nullptr_t) noexcept; // constexpr since C++23
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// observers
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typename constexpr add_lvalue_reference<T>::type operator*() const; // constexpr since C++23
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constexpr pointer operator->() const noexcept; // constexpr since C++23
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constexpr pointer get() const noexcept; // constexpr since C++23
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constexpr deleter_type& get_deleter() noexcept; // constexpr since C++23
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constexpr const deleter_type& get_deleter() const noexcept; // constexpr since C++23
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constexpr explicit operator bool() const noexcept; // constexpr since C++23
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// modifiers
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constexpr pointer release() noexcept; // constexpr since C++23
|
|
constexpr void reset(pointer p = pointer()) noexcept; // constexpr since C++23
|
|
constexpr void swap(unique_ptr& u) noexcept; // constexpr since C++23
|
|
};
|
|
|
|
template <class T, class D>
|
|
class unique_ptr<T[], D>
|
|
{
|
|
public:
|
|
typedef implementation-defined pointer;
|
|
typedef T element_type;
|
|
typedef D deleter_type;
|
|
|
|
// constructors
|
|
constexpr unique_ptr() noexcept;
|
|
constexpr explicit unique_ptr(pointer p) noexcept; // constexpr since C++23
|
|
constexpr unique_ptr(pointer p, see below d) noexcept; // constexpr since C++23
|
|
constexpr unique_ptr(pointer p, see below d) noexcept; // constexpr since C++23
|
|
constexpr unique_ptr(unique_ptr&& u) noexcept; // constexpr since C++23
|
|
template <class U, class E>
|
|
constexpr unique_ptr(unique_ptr <U, E>&& u) noexcept; // constexpr since C++23
|
|
constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
|
|
|
|
// destructor
|
|
constexpr ~unique_ptr(); // constexpr since C++23
|
|
|
|
// assignment
|
|
constexpr unique_ptr& operator=(unique_ptr&& u) noexcept; // constexpr since C++23
|
|
template <class U, class E>
|
|
constexpr unique_ptr& operator=(unique_ptr <U, E>&& u) noexcept; // constexpr since C++23
|
|
constexpr unique_ptr& operator=(nullptr_t) noexcept; // constexpr since C++23
|
|
|
|
// observers
|
|
constexpr T& operator[](size_t i) const; // constexpr since C++23
|
|
constexpr pointer get() const noexcept; // constexpr since C++23
|
|
constexpr deleter_type& get_deleter() noexcept; // constexpr since C++23
|
|
constexpr const deleter_type& get_deleter() const noexcept; // constexpr since C++23
|
|
constexpr explicit operator bool() const noexcept; // constexpr since C++23
|
|
|
|
// modifiers
|
|
constexpr pointer release() noexcept; // constexpr since C++23
|
|
constexpr void reset(pointer p = pointer()) noexcept; // constexpr since C++23
|
|
constexpr void reset(nullptr_t) noexcept; // constexpr since C++23
|
|
template <class U> void reset(U) = delete;
|
|
constexpr void swap(unique_ptr& u) noexcept; // constexpr since C++23
|
|
};
|
|
|
|
template <class T, class D>
|
|
constexpr void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; // constexpr since C++23
|
|
|
|
template <class T1, class D1, class T2, class D2>
|
|
constexpr bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); // constexpr since C++23
|
|
template <class T1, class D1, class T2, class D2>
|
|
bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); // removed in C++20
|
|
template <class T1, class D1, class T2, class D2>
|
|
bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
|
|
template <class T1, class D1, class T2, class D2>
|
|
bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
|
|
template <class T1, class D1, class T2, class D2>
|
|
bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
|
|
template <class T1, class D1, class T2, class D2>
|
|
bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
|
|
template<class T1, class D1, class T2, class D2>
|
|
requires three_way_comparable_with<typename unique_ptr<T1, D1>::pointer,
|
|
typename unique_ptr<T2, D2>::pointer>
|
|
compare_three_way_result_t<typename unique_ptr<T1, D1>::pointer,
|
|
typename unique_ptr<T2, D2>::pointer>
|
|
operator<=>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); // C++20
|
|
|
|
template <class T, class D>
|
|
constexpr bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; // constexpr since C++23
|
|
template <class T, class D>
|
|
bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; // removed in C++20
|
|
template <class T, class D>
|
|
bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; // removed in C++20
|
|
template <class T, class D>
|
|
bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; // removed in C++20
|
|
|
|
template <class T, class D>
|
|
constexpr bool operator<(const unique_ptr<T, D>& x, nullptr_t); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator<(nullptr_t, const unique_ptr<T, D>& y); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator<=(const unique_ptr<T, D>& x, nullptr_t); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator<=(nullptr_t, const unique_ptr<T, D>& y); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator>(const unique_ptr<T, D>& x, nullptr_t); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator>(nullptr_t, const unique_ptr<T, D>& y); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator>=(const unique_ptr<T, D>& x, nullptr_t); // constexpr since C++23
|
|
template <class T, class D>
|
|
constexpr bool operator>=(nullptr_t, const unique_ptr<T, D>& y); // constexpr since C++23
|
|
template<class T, class D>
|
|
requires three_way_comparable<typename unique_ptr<T, D>::pointer>
|
|
compare_three_way_result_t<typename unique_ptr<T, D>::pointer>
|
|
constexpr operator<=>(const unique_ptr<T, D>& x, nullptr_t); // C++20, constexpr since C++23
|
|
|
|
class bad_weak_ptr
|
|
: public std::exception
|
|
{
|
|
bad_weak_ptr() noexcept;
|
|
};
|
|
|
|
template<class T, class... Args>
|
|
constexpr unique_ptr<T> make_unique(Args&&... args); // C++14, constexpr since C++23
|
|
template<class T>
|
|
constexpr unique_ptr<T> make_unique(size_t n); // C++14, constexpr since C++23
|
|
template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N]
|
|
|
|
template<class T>
|
|
constexpr unique_ptr<T> make_unique_for_overwrite(); // T is not array, C++20, constexpr since C++23
|
|
template<class T>
|
|
constexpr unique_ptr<T> make_unique_for_overwrite(size_t n); // T is U[], C++20, constexpr since C++23
|
|
template<class T, class... Args>
|
|
unspecified make_unique_for_overwrite(Args&&...) = delete; // T is U[N], C++20
|
|
|
|
template<class E, class T, class Y, class D>
|
|
basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p);
|
|
|
|
template<class T>
|
|
class shared_ptr
|
|
{
|
|
public:
|
|
typedef T element_type; // until C++17
|
|
typedef remove_extent_t<T> element_type; // since C++17
|
|
typedef weak_ptr<T> weak_type; // C++17
|
|
|
|
// constructors:
|
|
constexpr shared_ptr() noexcept;
|
|
template<class Y> explicit shared_ptr(Y* p);
|
|
template<class Y, class D> shared_ptr(Y* p, D d);
|
|
template<class Y, class D, class A> shared_ptr(Y* p, D d, A a);
|
|
template <class D> shared_ptr(nullptr_t p, D d);
|
|
template <class D, class A> shared_ptr(nullptr_t p, D d, A a);
|
|
template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept;
|
|
shared_ptr(const shared_ptr& r) noexcept;
|
|
template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept;
|
|
shared_ptr(shared_ptr&& r) noexcept;
|
|
template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept;
|
|
template<class Y> explicit shared_ptr(const weak_ptr<Y>& r);
|
|
template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17
|
|
template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r);
|
|
shared_ptr(nullptr_t) : shared_ptr() { }
|
|
|
|
// destructor:
|
|
~shared_ptr();
|
|
|
|
// assignment:
|
|
shared_ptr& operator=(const shared_ptr& r) noexcept;
|
|
template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept;
|
|
shared_ptr& operator=(shared_ptr&& r) noexcept;
|
|
template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r);
|
|
template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17
|
|
template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r);
|
|
|
|
// modifiers:
|
|
void swap(shared_ptr& r) noexcept;
|
|
void reset() noexcept;
|
|
template<class Y> void reset(Y* p);
|
|
template<class Y, class D> void reset(Y* p, D d);
|
|
template<class Y, class D, class A> void reset(Y* p, D d, A a);
|
|
|
|
// observers:
|
|
T* get() const noexcept;
|
|
T& operator*() const noexcept;
|
|
T* operator->() const noexcept;
|
|
long use_count() const noexcept;
|
|
bool unique() const noexcept;
|
|
explicit operator bool() const noexcept;
|
|
template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept;
|
|
template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept;
|
|
};
|
|
|
|
template<class T>
|
|
shared_ptr(weak_ptr<T>) -> shared_ptr<T>;
|
|
template<class T, class D>
|
|
shared_ptr(unique_ptr<T, D>) -> shared_ptr<T>;
|
|
|
|
// shared_ptr comparisons:
|
|
template<class T, class U>
|
|
bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
|
|
template<class T, class U>
|
|
bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; // removed in C++20
|
|
template<class T, class U>
|
|
bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; // removed in C++20
|
|
template<class T, class U>
|
|
bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; // removed in C++20
|
|
template<class T, class U>
|
|
bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; // removed in C++20
|
|
template<class T, class U>
|
|
bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; // removed in C++20
|
|
template<class T, class U>
|
|
strong_ordering operator<=>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; // C++20
|
|
|
|
template <class T>
|
|
bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept;
|
|
template <class T>
|
|
bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; // removed in C++20
|
|
template <class T>
|
|
bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; // removed in C++20
|
|
template<class T>
|
|
strong_ordering operator<=>(shared_ptr<T> const& x, nullptr_t) noexcept; // C++20
|
|
|
|
// shared_ptr specialized algorithms:
|
|
template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept;
|
|
|
|
// shared_ptr casts:
|
|
template<class T, class U>
|
|
shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept;
|
|
template<class T, class U>
|
|
shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept;
|
|
template<class T, class U>
|
|
shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept;
|
|
|
|
// shared_ptr I/O:
|
|
template<class E, class T, class Y>
|
|
basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p);
|
|
|
|
// shared_ptr get_deleter:
|
|
template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept;
|
|
|
|
template<class T, class... Args>
|
|
shared_ptr<T> make_shared(Args&&... args); // T is not an array
|
|
template<class T, class A, class... Args>
|
|
shared_ptr<T> allocate_shared(const A& a, Args&&... args); // T is not an array
|
|
|
|
template<class T>
|
|
shared_ptr<T> make_shared(size_t N); // T is U[] (since C++20)
|
|
template<class T, class A>
|
|
shared_ptr<T> allocate_shared(const A& a, size_t N); // T is U[] (since C++20)
|
|
|
|
template<class T>
|
|
shared_ptr<T> make_shared(); // T is U[N] (since C++20)
|
|
template<class T, class A>
|
|
shared_ptr<T> allocate_shared(const A& a); // T is U[N] (since C++20)
|
|
|
|
template<class T>
|
|
shared_ptr<T> make_shared(size_t N, const remove_extent_t<T>& u); // T is U[] (since C++20)
|
|
template<class T, class A>
|
|
shared_ptr<T> allocate_shared(const A& a, size_t N, const remove_extent_t<T>& u); // T is U[] (since C++20)
|
|
|
|
template<class T> shared_ptr<T>
|
|
make_shared(const remove_extent_t<T>& u); // T is U[N] (since C++20)
|
|
template<class T, class A>
|
|
shared_ptr<T> allocate_shared(const A& a, const remove_extent_t<T>& u); // T is U[N] (since C++20)
|
|
|
|
template<class T>
|
|
shared_ptr<T> make_shared_for_overwrite(); // T is not U[], C++20
|
|
template<class T, class A>
|
|
shared_ptr<T> allocate_shared_for_overwrite(const A& a); // T is not U[], C++20
|
|
|
|
template<class T>
|
|
shared_ptr<T> make_shared_for_overwrite(size_t N); // T is U[], C++20
|
|
template<class T, class A>
|
|
shared_ptr<T> allocate_shared_for_overwrite(const A& a, size_t N); // T is U[], C++20
|
|
|
|
template<class T>
|
|
class weak_ptr
|
|
{
|
|
public:
|
|
typedef T element_type; // until C++17
|
|
typedef remove_extent_t<T> element_type; // since C++17
|
|
|
|
// constructors
|
|
constexpr weak_ptr() noexcept;
|
|
template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept;
|
|
weak_ptr(weak_ptr const& r) noexcept;
|
|
template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept;
|
|
weak_ptr(weak_ptr&& r) noexcept; // C++14
|
|
template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14
|
|
|
|
// destructor
|
|
~weak_ptr();
|
|
|
|
// assignment
|
|
weak_ptr& operator=(weak_ptr const& r) noexcept;
|
|
template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept;
|
|
template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept;
|
|
weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14
|
|
template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14
|
|
|
|
// modifiers
|
|
void swap(weak_ptr& r) noexcept;
|
|
void reset() noexcept;
|
|
|
|
// observers
|
|
long use_count() const noexcept;
|
|
bool expired() const noexcept;
|
|
shared_ptr<T> lock() const noexcept;
|
|
template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept;
|
|
template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept;
|
|
};
|
|
|
|
template<class T>
|
|
weak_ptr(shared_ptr<T>) -> weak_ptr<T>;
|
|
|
|
// weak_ptr specialized algorithms:
|
|
template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept;
|
|
|
|
// class owner_less:
|
|
template<class T> struct owner_less;
|
|
|
|
template<class T>
|
|
struct owner_less<shared_ptr<T> >
|
|
: binary_function<shared_ptr<T>, shared_ptr<T>, bool>
|
|
{
|
|
typedef bool result_type;
|
|
bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept;
|
|
bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept;
|
|
bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept;
|
|
};
|
|
|
|
template<class T>
|
|
struct owner_less<weak_ptr<T> >
|
|
: binary_function<weak_ptr<T>, weak_ptr<T>, bool>
|
|
{
|
|
typedef bool result_type;
|
|
bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept;
|
|
bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept;
|
|
bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept;
|
|
};
|
|
|
|
template <> // Added in C++14
|
|
struct owner_less<void>
|
|
{
|
|
template <class _Tp, class _Up>
|
|
bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept;
|
|
template <class _Tp, class _Up>
|
|
bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept;
|
|
template <class _Tp, class _Up>
|
|
bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept;
|
|
template <class _Tp, class _Up>
|
|
bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept;
|
|
|
|
typedef void is_transparent;
|
|
};
|
|
|
|
template<class T>
|
|
class enable_shared_from_this
|
|
{
|
|
protected:
|
|
constexpr enable_shared_from_this() noexcept;
|
|
enable_shared_from_this(enable_shared_from_this const&) noexcept;
|
|
enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept;
|
|
~enable_shared_from_this();
|
|
public:
|
|
shared_ptr<T> shared_from_this();
|
|
shared_ptr<T const> shared_from_this() const;
|
|
};
|
|
|
|
template<class T>
|
|
bool atomic_is_lock_free(const shared_ptr<T>* p);
|
|
template<class T>
|
|
shared_ptr<T> atomic_load(const shared_ptr<T>* p);
|
|
template<class T>
|
|
shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo);
|
|
template<class T>
|
|
void atomic_store(shared_ptr<T>* p, shared_ptr<T> r);
|
|
template<class T>
|
|
void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo);
|
|
template<class T>
|
|
shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r);
|
|
template<class T>
|
|
shared_ptr<T>
|
|
atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo);
|
|
template<class T>
|
|
bool
|
|
atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w);
|
|
template<class T>
|
|
bool
|
|
atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w);
|
|
template<class T>
|
|
bool
|
|
atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v,
|
|
shared_ptr<T> w, memory_order success,
|
|
memory_order failure);
|
|
template<class T>
|
|
bool
|
|
atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v,
|
|
shared_ptr<T> w, memory_order success,
|
|
memory_order failure);
|
|
// Hash support
|
|
template <class T> struct hash;
|
|
template <class T, class D> struct hash<unique_ptr<T, D> >;
|
|
template <class T> struct hash<shared_ptr<T> >;
|
|
|
|
template <class T, class Alloc>
|
|
inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value;
|
|
|
|
// [ptr.align]
|
|
void* align(size_t alignment, size_t size, void*& ptr, size_t& space);
|
|
|
|
template<size_t N, class T>
|
|
[[nodiscard]] constexpr T* assume_aligned(T* ptr); // since C++20
|
|
|
|
} // std
|
|
|
|
*/
|
|
|
|
#include <__assert> // all public C++ headers provide the assertion handler
|
|
#include <__config>
|
|
#include <__memory/addressof.h>
|
|
#include <__memory/align.h>
|
|
#include <__memory/allocate_at_least.h>
|
|
#include <__memory/allocation_guard.h>
|
|
#include <__memory/allocator.h>
|
|
#include <__memory/allocator_arg_t.h>
|
|
#include <__memory/allocator_traits.h>
|
|
#include <__memory/assume_aligned.h>
|
|
#include <__memory/auto_ptr.h>
|
|
#include <__memory/compressed_pair.h>
|
|
#include <__memory/concepts.h>
|
|
#include <__memory/construct_at.h>
|
|
#include <__memory/pointer_traits.h>
|
|
#include <__memory/ranges_construct_at.h>
|
|
#include <__memory/ranges_uninitialized_algorithms.h>
|
|
#include <__memory/raw_storage_iterator.h>
|
|
#include <__memory/shared_ptr.h>
|
|
#include <__memory/temporary_buffer.h>
|
|
#include <__memory/uninitialized_algorithms.h>
|
|
#include <__memory/unique_ptr.h>
|
|
#include <__memory/uses_allocator.h>
|
|
#include <__memory/uses_allocator_construction.h>
|
|
#include <version>
|
|
|
|
// standard-mandated includes
|
|
|
|
// [memory.syn]
|
|
#include <compare>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17
|
|
# include <__pstl_memory>
|
|
#endif
|
|
|
|
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
|
|
# include <concepts>
|
|
# include <cstddef>
|
|
# include <cstdint>
|
|
# include <cstring>
|
|
# include <iosfwd>
|
|
# include <iterator>
|
|
# include <new>
|
|
# include <stdexcept>
|
|
# include <tuple>
|
|
# include <type_traits>
|
|
# include <typeinfo>
|
|
# include <utility>
|
|
#endif
|
|
|
|
#endif // _LIBCPP_MEMORY
|