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# std::enable_shared_from_this::enable_shared_from_this

From cppreference.com
< cpp‎ | memory‎ | enable shared from this

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

Constructs new `enable_shared_from_this` object.

### [edit] Parameters

obj | - | an `enable_shared_from_this` to copy

### [edit] Exceptions

`noexcept` specification:
noexcept

### [edit] 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
    }

### [edit] See also

shared_ptr (C++11) | smart pointer with shared object ownership semantics (class template) [edit]

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Category:

- unconditionally noexcept