# std::auto_ptr<T>::operator auto_ptr<Y>

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< cpp‎ | memory‎ | auto ptr

template< class Y > operator auto_ptr_ref<Y>() throw(); | (1) | (deprecated in C++11) (removed in C++17)
template< class Y > operator auto_ptr<Y>() throw(); | (2) | (deprecated in C++11) (removed in C++17)

Converts *this to an `auto_ptr` for a different type `Y`.

1) Returns an implementation-defined type that holds a reference to *this. std::auto_ptr is convertible and assignable from this template. The implementation is allowed to provide the template with a different name or implement equivalent functionality in other ways.
2) Constructs a new `auto_ptr` with a pointer obtained by calling release().

### Parameters

(none)

### Return value

1) An implementation-defined type that holds a reference to *this.
2) An `auto_ptr` with a pointer obtained by calling release().

### Notes

The constructor and the copy assignment operator from `auto_ptr_ref` is provided to allow copy-constructing and assigning std::auto_ptr from nameless temporaries. Since its copy constructor and copy assignment operator take the argument as non-const reference, they cannot bind rvalue arguments directly. However, a user-defined conversion (1) or (2) can be executed (which releases the original `auto_ptr`), followed by a call to the constructor or copy-assignment operator that take `auto_ptr_ref` by value. This is an early implementation of move semantics.

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