std::experimental::shared_ptr

 

C++

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Standard library headers

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Feature test macros (C++20)

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Concepts library (C++20)

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Technical specifications

Symbols index

External libraries

 

Experimental

Technical Specification

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Extensions for concurrency 2 (concurrency TS v2)

Concepts (concepts TS)

Ranges (ranges TS)

Reflection (reflection TS)

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Experimental Non-TS

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Library fundamentals

experimental::optional

experimental::any

experimental::basic_string_view

experimental::sample

experimental::shared_ptr

experimental::weak_ptr

experimental::apply

experimental::invocation_typeexperimental::raw_invocation_type

experimental::search

experimental::default_searcherexperimental::make_default_searcher

experimental::boyer_moore_searcherexperimental::make_boyer_moore_searcher

experimental::boyer_moore_horspool_searcherexperimental::make_boyer_moore_horspool_searcher

Type-erased and polymorphic allocators

Variable templates for type traits

 

std::experimental::shared_ptr

Member functions

shared_ptr::shared_ptr

shared_ptr::get

shared_ptr::operator*shared_ptr::operator->

shared_ptr::operator[]

Non-member functions

experimental::static_pointer_castexperimental::dynamic_pointer_castexperimental::const_pointer_castexperimental::reinterpret_pointer_cast

std::hash

Members and non-members identical to those of std::shared_ptr

 

Defined in header <experimental/memory>
template< class T > class shared_ptr;		(library fundamentals TS)

std::experimental::shared_ptr is a modified version of std::shared_ptr that adds support for arrays.

Member types

Member type	Definition
element_type	std::remove_extent_t<T>

Member functions

(constructor)	constructs new shared_ptr (public member function)
Observers
get	returns the stored pointer (public member function)
operator*operator->	dereferences the stored pointer (public member function)
operator[]	provides index access to the array (public member function)

Non-member functions

static_pointer_castdynamic_pointer_castconst_pointer_castreinterpret_pointer_cast

applies static_cast, dynamic_cast, const_cast, or reinterpret_cast to the stored pointer (function template)

Helper classes

std::hash<std::experimental::shared_ptr>

hash support for std::experimental::shared_ptr (class template specialization)

Members and non-members identical to std::shared_ptr

Member functions

The following member functions work with std::experimental::shared_ptr instead of std::shared_ptr and std::experimental::weak_ptr instead of std::weak_ptr. The behavior is otherwise identical.

(destructor)	destructs the owned object if no more shared_ptrs link to it (public member function of std::shared_ptr<T>)
operator=	assigns the shared_ptr (public member function of std::shared_ptr<T>)
Modifiers
reset	replaces the managed object (public member function of std::shared_ptr<T>)
swap	swaps the managed objects (public member function of std::shared_ptr<T>)
Observers
use_count	returns the number of shared_ptr objects referring to the same managed object (public member function of std::shared_ptr<T>)
unique (until C++20)	checks whether the managed object is managed only by the current shared_ptr object (public member function of std::shared_ptr<T>)
operator bool	checks if the stored pointer is not null (public member function of std::shared_ptr<T>)
owner_before	provides owner-based ordering of shared pointers (public member function of std::shared_ptr<T>)

Non-member functions

These non-member functions are declared in the std::experimental namespace, and work with std::experimental::shared_ptr rather than std::shared_ptr, but otherwise behaves identically to the corresponding C++14 function.

make_sharedmake_shared_for_overwrite (C++20)	creates a shared pointer that manages a new object (function template)
allocate_sharedallocate_shared_for_overwrite (C++20)	creates a shared pointer that manages a new object allocated using an allocator (function template)
get_deleter	returns the deleter of specified type, if owned (function template)
operator==operator!=operator<operator<=operator>operator>=operator<=> (removed in C++20)(removed in C++20)(removed in C++20)(removed in C++20)(removed in C++20)(C++20)	compares with another shared_ptr or with nullptr (function template)
operator<<(std::shared_ptr)	outputs the value of the stored pointer to an output stream (function template)
std::swap(std::shared_ptr) (C++11)	specializes the std::swap algorithm (function template)

std::atomic_is_lock_free(std::shared_ptr)std::atomic_load(std::shared_ptr)std::atomic_load_explicit(std::shared_ptr)std::atomic_store(std::shared_ptr)std::atomic_store_explicit(std::shared_ptr)std::atomic_exchange(std::shared_ptr)std::atomic_exchange_explicit(std::shared_ptr)std::atomic_compare_exchange_weak(std::shared_ptr)std::atomic_compare_exchange_strong(std::shared_ptr)std::atomic_compare_exchange_weak_explicit(std::shared_ptr)std::atomic_compare_exchange_strong_explicit(std::shared_ptr) (deprecated in C++20)(removed in C++26)

specializes atomic operations for std::shared_ptr (function template)

Helper class templates

These class templates are declared in the std::experimental namespace, and work with std::experimental::shared_ptr and std::experimental::weak_ptr rather than std::shared_ptr and std::weak_ptr, but otherwise behaves identically to the corresponding C++14 class template.

owner_less (C++11)	provides mixed-type owner-based ordering of shared and weak pointers (class template)
enable_shared_from_this (C++11)	allows an object to create a shared_ptr referring to itself (class template)

Example

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