// -*- 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_MEMORY
#define _LIBCPP_MEMORY
// clang-format off
/*
memory synopsis
namespace std
{
struct allocator_arg_t { };
inline constexpr allocator_arg_t allocator_arg = allocator_arg_t();
template <class T, class Alloc> struct uses_allocator;
template <class Ptr>
struct pointer_traits
{
typedef Ptr pointer;
typedef <details> element_type;
typedef <details> difference_type;
template <class U> using rebind = <details>;
static pointer pointer_to(<details>);
};
template <class T>
struct pointer_traits<T*>
{
typedef T* pointer;
typedef T element_type;
typedef ptrdiff_t difference_type;
template <class U> using rebind = U*;
static pointer pointer_to(<details>) noexcept; // constexpr in C++20
};
template <class T> constexpr T* to_address(T* p) noexcept; // C++20
template <class Ptr> constexpr auto to_address(const Ptr& p) noexcept; // C++20
template <class Alloc>
struct allocator_traits
{
typedef Alloc allocator_type;
typedef typename allocator_type::value_type
value_type;
typedef Alloc::pointer | value_type* pointer;
typedef Alloc::const_pointer
| pointer_traits<pointer>::rebind<const value_type>
const_pointer;
typedef Alloc::void_pointer
| pointer_traits<pointer>::rebind<void>
void_pointer;
typedef Alloc::const_void_pointer
| pointer_traits<pointer>::rebind<const void>
const_void_pointer;
typedef Alloc::difference_type
| pointer_traits<pointer>::difference_type
difference_type;
typedef Alloc::size_type
| make_unsigned<difference_type>::type
size_type;
typedef Alloc::propagate_on_container_copy_assignment
| false_type propagate_on_container_copy_assignment;
typedef Alloc::propagate_on_container_move_assignment
| false_type propagate_on_container_move_assignment;
typedef Alloc::propagate_on_container_swap
| false_type propagate_on_container_swap;
typedef Alloc::is_always_equal
| is_empty is_always_equal;
template <class T> using rebind_alloc = Alloc::rebind<T>::other | Alloc<T, Args...>;
template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>;
static pointer allocate(allocator_type& a, size_type n); // constexpr and [[nodiscard]] in C++20
static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // constexpr and [[nodiscard]] in C++20
[[nodiscard]] static constexpr allocation_result<pointer, size_type>
allocate_at_least(Alloc& a, size_type n); // Since C++23
static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; // constexpr in C++20
template <class T, class... Args>
static void construct(allocator_type& a, T* p, Args&&... args); // constexpr in C++20
template <class T>
static void destroy(allocator_type& a, T* p); // constexpr in C++20
static size_type max_size(const allocator_type& a); // noexcept in C++14, constexpr in C++20
static allocator_type select_on_container_copy_construction(const allocator_type& a); // constexpr in C++20
};
template<class Pointer, class SizeType = size_t>
struct allocation_result {
Pointer ptr;
SizeType count;
}; // Since C++23
template <>
class allocator<void> // removed in C++20
{
public:
typedef void* pointer;
typedef const void* const_pointer;
typedef void value_type;
template <class _Up> struct rebind {typedef allocator<_Up> other;};
};
template <class T>
class allocator
{
public:
typedef size_t size_type;
typedef ptrdiff_t difference_type;
typedef T* pointer; // deprecated in C++17, removed in C++20
typedef const T* const_pointer; // deprecated in C++17, removed in C++20
typedef typename add_lvalue_reference<T>::type
reference; // deprecated in C++17, removed in C++20
typedef typename add_lvalue_reference<const T>::type
const_reference; // deprecated in C++17, removed in C++20
typedef T value_type;
template <class U> struct rebind {typedef allocator<U> other;}; // deprecated in C++17, removed in C++20
typedef true_type propagate_on_container_move_assignment;
typedef true_type is_always_equal; // Deprecated in C++23, removed in C++26
constexpr allocator() noexcept; // constexpr in C++20
constexpr allocator(const allocator&) noexcept; // constexpr in C++20
template <class U>
constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20
~allocator(); // constexpr in C++20
pointer address(reference x) const noexcept; // deprecated in C++17, removed in C++20
const_pointer address(const_reference x) const noexcept; // deprecated in C++17, removed in C++20
T* allocate(size_t n, const void* hint); // deprecated in C++17, removed in C++20
T* allocate(size_t n); // constexpr in C++20
void deallocate(T* p, size_t n) noexcept; // constexpr in C++20
size_type max_size() const noexcept; // deprecated in C++17, removed in C++20
template<class U, class... Args>
void construct(U* p, Args&&... args); // deprecated in C++17, removed in C++20
template <class U>
void destroy(U* p); // deprecated in C++17, removed in C++20
};
template <class T, class U>
bool operator==(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20
template <class T, class U>
bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; // removed in C++20
template <class OutputIterator, class T>
class raw_storage_iterator // deprecated in C++17, removed in C++20
: public iterator<output_iterator_tag, void, void, void, void> // until C++17
{
public:
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type; // until C++20
typedef ptrdiff_t difference_type; // since C++20
typedef void pointer;
typedef void reference;
explicit raw_storage_iterator(OutputIterator x);
raw_storage_iterator& operator*();
raw_storage_iterator& operator=(const T& element);
raw_storage_iterator& operator++();
raw_storage_iterator operator++(int);
};
template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept;
template <class T> void return_temporary_buffer(T* p) noexcept;
template <class T> T* addressof(T& r) noexcept;
template <class T> T* addressof(const T&& r) noexcept = delete;
template <class InputIterator, class ForwardIterator>
ForwardIterator
uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result);
namespace ranges {
template<class InputIterator, class OutputIterator>
using uninitialized_copy_result = in_out_result<InputIterator, OutputIterator>; // since C++20
template<input_iterator InputIterator, sentinel-for<InputIterator> Sentinel1, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<OutputIterator> Sentinel2>
requires constructible_from<iter_value_t<OutputIterator>, iter_reference_t<InputIterator>>
uninitialized_copy_result<InputIterator, OutputIterator>
uninitialized_copy(InputIterator ifirst, Sentinel1 ilast, OutputIterator ofirst, Sentinel2 olast); // since C++20
template<input_range InputRange, nothrow-forward-range OutputRange>
requires constructible_from<range_value_t<OutputRange>, range_reference_t<InputRange>>
uninitialized_copy_result<borrowed_iterator_t<InputRange>, borrowed_iterator_t<OutputRange>>
uninitialized_copy(InputRange&& in_range, OutputRange&& out_range); // since C++20
}
template <class InputIterator, class Size, class ForwardIterator>
ForwardIterator
uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result);
namespace ranges {
template<class InputIterator, class OutputIterator>
using uninitialized_copy_n_result = in_out_result<InputIterator, OutputIterator>; // since C++20
template<input_iterator InputIterator, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<OutputIterator> Sentinel>
requires constructible_from<iter_value_t<OutputIterator>, iter_reference_t<InputIterator>>
uninitialized_copy_n_result<InputIterator, OutputIterator>
uninitialized_copy_n(InputIterator ifirst, iter_difference_t<InputIterator> n, OutputIterator ofirst, Sentinel olast); // since C++20
}
template <class ForwardIterator, class T>
void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x);
namespace ranges {
template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel, class T>
requires constructible_from<iter_value_t<ForwardIterator>, const T&>
ForwardIterator uninitialized_fill(ForwardIterator first, Sentinel last, const T& x); // since C++20
template <nothrow-forward-range ForwardRange, class T>
requires constructible_from<range_value_t<ForwardRange>, const T&>
borrowed_iterator_t<ForwardRange> uninitialized_fill(ForwardRange&& range, const T& x); // since C++20
}
template <class ForwardIterator, class Size, class T>
ForwardIterator
uninitialized_fill_n(ForwardIterator first, Size n, const T& x);
namespace ranges {
template <nothrow-forward-iterator ForwardIterator, class T>
requires constructible_from<iter_value_t<ForwardIterator>, const T&>
ForwardIterator uninitialized_fill_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20
}
template <class T, class ...Args>
constexpr T* construct_at(T* location, Args&& ...args); // since C++20
namespace ranges {
template<class T, class... Args>
constexpr T* construct_at(T* location, Args&&... args); // since C++20
}
template <class T>
void destroy_at(T* location); // constexpr in C++20
namespace ranges {
template<destructible T>
constexpr void destroy_at(T* location) noexcept; // since C++20
}
template <class ForwardIterator>
void destroy(ForwardIterator first, ForwardIterator last); // constexpr in C++20
namespace ranges {
template<nothrow-input-iterator InputIterator, nothrow-sentinel-for<InputIterator> Sentinel>
requires destructible<iter_value_t<InputIterator>>
constexpr InputIterator destroy(InputIterator first, Sentinel last) noexcept; // since C++20
template<nothrow-input-range InputRange>
requires destructible<range_value_t<InputRange>>
constexpr borrowed_iterator_t<InputRange> destroy(InputRange&& range) noexcept; // since C++20
}
template <class ForwardIterator, class Size>
ForwardIterator destroy_n(ForwardIterator first, Size n); // constexpr in C++20
namespace ranges {
template<nothrow-input-iterator InputIterator>
requires destructible<iter_value_t<InputIterator>>
constexpr InputIterator destroy_n(InputIterator first, iter_difference_t<InputIterator> n) noexcept; // since C++20
}
template <class InputIterator, class ForwardIterator>
ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result);
namespace ranges {
template<class InputIterator, class OutputIterator>
using uninitialized_move_result = in_out_result<InputIterator, OutputIterator>; // since C++20
template <input_iterator InputIterator, sentinel_for<InputIterator> Sentinel1, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<O> Sentinel2>
requires constructible_from<iter_value_t<OutputIterator>, iter_rvalue_reference_t<InputIterator>>
uninitialized_move_result<InputIterator, OutputIterator>
uninitialized_move(InputIterator ifirst, Sentinel1 ilast, OutputIterator ofirst, Sentinel2 olast); // since C++20
template<input_range InputRange, nothrow-forward-range OutputRange>
requires constructible_from<range_value_t<OutputRange>, range_rvalue_reference_t<InputRange>>
uninitialized_move_result<borrowed_iterator_t<InputRange>, borrowed_iterator_t<OutputRange>>
uninitialized_move(InputRange&& in_range, OutputRange&& out_range); // since C++20
}
template <class InputIterator, class Size, class ForwardIterator>
pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result);
namespace ranges {
template<class InputIterator, class OutputIterator>
using uninitialized_move_n_result = in_out_result<InputIterator, OutputIterator>; // since C++20
template<input_iterator InputIterator, nothrow-forward-iterator OutputIterator, nothrow-sentinel-for<OutputIterator> Sentinel>
requires constructible_from<iter_value_t<OutputIterator>, iter_rvalue_reference_t<InputIterator>>
uninitialized_move_n_result<InputIterator, OutputIterator>
uninitialized_move_n(InputIterator ifirst, iter_difference_t<InputIterator> n, OutputIterator ofirst, Sentinel olast); // since C++20
}
template <class ForwardIterator>
void uninitialized_value_construct(ForwardIterator first, ForwardIterator last);
namespace ranges {
template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel>
requires default_initializable<iter_value_t<ForwardIterator>>
ForwardIterator uninitialized_value_construct(ForwardIterator first, Sentinel last); // since C++20
template <nothrow-forward-range ForwardRange>
requires default_initializable<range_value_t<ForwardRange>>
borrowed_iterator_t<ForwardRange> uninitialized_value_construct(ForwardRange&& r); // since C++20
}
template <class ForwardIterator, class Size>
ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n);
namespace ranges {
template <nothrow-forward-iterator ForwardIterator>
requires default_initializable<iter_value_t<ForwardIterator>>
ForwardIterator uninitialized_value_construct_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20
}
template <class ForwardIterator>
void uninitialized_default_construct(ForwardIterator first, ForwardIterator last);
namespace ranges {
template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel>
requires default_initializable<iter_value_t<ForwardIterator>>
ForwardIterator uninitialized_default_construct(ForwardIterator first, Sentinel last); // since C++20
template <nothrow-forward-range ForwardRange>
requires default_initializable<range_value_t<ForwardRange>>
borrowed_iterator_t<ForwardRange> uninitialized_default_construct(ForwardRange&& r); // since C++20
}
template <class ForwardIterator, class Size>
ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n);
namespace ranges {
template <nothrow-forward-iterator ForwardIterator>
requires default_initializable<iter_value_t<ForwardIterator>>
ForwardIterator uninitialized_default_construct_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20
}
template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17
template<class X>
class auto_ptr // deprecated in C++11, removed in C++17
{
public:
typedef X element_type;
explicit auto_ptr(X* p =0) throw();
auto_ptr(auto_ptr&) throw();
template<class Y> auto_ptr(auto_ptr<Y>&) throw();
auto_ptr& operator=(auto_ptr&) throw();
template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw();
auto_ptr& operator=(auto_ptr_ref<X> r) throw();
~auto_ptr() throw();
typename add_lvalue_reference<X>::type operator*() const throw();
X* operator->() const throw();
X* get() const throw();
X* release() throw();
void reset(X* p =0) throw();
auto_ptr(auto_ptr_ref<X>) throw();
template<class Y> operator auto_ptr_ref<Y>() throw();
template<class Y> operator auto_ptr<Y>() throw();
};
template <class T>
struct default_delete
{
constexpr default_delete() noexcept = default;
template <class U> constexpr default_delete(const default_delete<U>&) noexcept; // constexpr since C++23
constexpr void operator()(T*) const noexcept; // constexpr since C++23
};
template <class T>
struct default_delete<T[]>
{
constexpr default_delete() noexcept = default;
template <class U> constexpr default_delete(const default_delete <U[]>&) noexcept; // constexpr since C++23
constexpr void operator()(T*) const noexcept; // constexpr since C++23
template <class U> void operator()(U*) const = delete;
};
template <class T, class D = default_delete<T>>
class unique_ptr
{
public:
typedef see below 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 d1) noexcept; // constexpr since C++23
constexpr unique_ptr(pointer p, see below d2) noexcept; // constexpr since C++23
constexpr unique_ptr(unique_ptr&& u) noexcept; // constexpr since C++23
constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
template <class U, class E>
constexpr unique_ptr(unique_ptr<U, E>&& u) noexcept; // constexpr since C++23
template <class U>
unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17
// 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
add_lvalue_reference<T>::type operator*() const noexcept(see below); // constexpr since C++23
constexpr pointer operator->() const noexcept; // 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 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; // deprected in C++17, removed in C++20
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;
// [allocator.uses.construction], uses-allocator construction
template<class T, class Alloc, class... Args>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
Args&&... args) noexcept;
template<class T, class Alloc, class Tuple1, class Tuple2>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
piecewise_construct_t,
Tuple1&& x, Tuple2&& y) noexcept;
template<class T, class Alloc>
constexpr auto uses_allocator_construction_args(const Alloc& alloc) noexcept; // since C++20
template<class T, class Alloc, class U, class V>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
U&& u, V&& v) noexcept;
template<class T, class Alloc, class U, class V>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++23
pair<U, V>& pr) noexcept;
template<class T, class Alloc, class U, class V>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
const pair<U, V>& pr) noexcept;
template<class T, class Alloc, class U, class V>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
pair<U, V>&& pr) noexcept;
template<class T, class Alloc, class U, class V>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++23
const pair<U, V>&& pr) noexcept;
template<class T, class Alloc, pair-like P>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
P&& p) noexcept;
template<class T, class Alloc, class U>
constexpr auto uses_allocator_construction_args(const Alloc& alloc, // since C++20
U&& u) noexcept;
template<class T, class Alloc, class... Args>
constexpr T make_obj_using_allocator(const Alloc& alloc, Args&&... args); // since C++20
template<class T, class Alloc, class... Args>
constexpr T* uninitialized_construct_using_allocator(T* p, // since C++20
const Alloc& alloc, Args&&... args);
// [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
// [out.ptr.t], class template out_ptr_t
template<class Smart, class Pointer, class... Args>
class out_ptr_t; // since c++23
// [out.ptr], function template out_ptr
template<class Pointer = void, class Smart, class... Args>
auto out_ptr(Smart& s, Args&&... args); // since c++23
// [inout.ptr.t], class template inout_ptr_t
template<class Smart, class Pointer, class... Args>
class inout_ptr_t; // since c++23
// [inout.ptr], function template inout_ptr
template<class Pointer = void, class Smart, class... Args>
auto inout_ptr(Smart& s, Args&&... args); // since c++23
} // std
*/
// clang-format on
#include <__config>
#include <__memory/addressof.h>
#include <__memory/align.h>
#include <__memory/allocator.h>
#include <__memory/allocator_arg_t.h>
#include <__memory/allocator_traits.h>
#include <__memory/auto_ptr.h>
#include <__memory/inout_ptr.h>
#include <__memory/out_ptr.h>
#include <__memory/pointer_traits.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>
// standard-mandated includes
#if _LIBCPP_STD_VER >= 17
# include <__memory/construct_at.h>
#endif
#if _LIBCPP_STD_VER >= 20
# include <__memory/assume_aligned.h>
# include <__memory/concepts.h>
# include <__memory/ranges_construct_at.h>
# include <__memory/ranges_uninitialized_algorithms.h>
# include <__memory/uses_allocator_construction.h>
#endif
#if _LIBCPP_STD_VER >= 23
# include <__memory/allocate_at_least.h>
#endif
#include <version>
// [memory.syn]
#include <compare>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <atomic>
# include <concepts>
# include <cstddef>
# include <cstdint>
# include <cstdlib>
# include <cstring>
# include <iosfwd>
# include <iterator>
# include <new>
# include <stdexcept>
# include <tuple>
# include <type_traits>
# include <typeinfo>
# include <utility>
#endif
#endif // _LIBCPP_MEMORY
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