NAME¶

std::enable_shared_from_this::enable_shared_from_this - std::enable_shared_from_this::enable_shared_from_this

Synopsis¶

constexpr enable_shared_from_this() noexcept; (1) (since C++11)
enable_shared_from_this( const enable_shared_from_this<T>&obj ) (2) (since C++11)
noexcept;

Constructs a new enable_shared_from_this object. The private std::weak_ptr<T> member
is value-initialized.

Parameters¶

obj - an enable_shared_from_this to copy

Notes¶

There is no move constructor: moving from an object derived from
enable_shared_from_this does not transfer its shared identity.

Example¶

// Run this code

#include <memory>

struct Foo : public std::enable_shared_from_this<Foo> {
Foo() {} // implicitly calls enable_shared_from_this constructor
std::shared_ptr<Foo> getFoo() { return shared_from_this(); }
};

int main() {
std::shared_ptr<Foo> pf1(new Foo);
auto pf2 = pf1->getFoo(); // shares ownership of object with pf1
}

See also¶

shared_ptr smart pointer with shared object ownership semantics
(C++11) (class template)