constexpr enable_shared_from_this() noexcept; | (1) | (since C++11) |
enable_shared_from_this( const enable_shared_from_this<T>&obj ) noexcept; | (2) | (since C++11) |
Constructs a new enable_shared_from_this object. The private std::weak_ptr<T> member is value-initialized.
| obj | - | an enable_shared_from_this to copy |
There is no move constructor: moving from an object derived from shared_from_this does not transfer its shared identity.
#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
}|
(C++11) | smart pointer with shared object ownership semantics (class template) |
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