std::auto_ptr::operator auto_ptr<Y> - cppreference.com

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

From cppreference.com
< cpp‎ | memory‎ | auto ptr

template< class Y > operator auto_ptr_ref<Y>(); | (1) | (deprecated)
template< class Y > operator auto_ptr<Y>(); | (2) | (deprecated)

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().

### [edit] Parameters

(none)

### [edit] Return value

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

### [edit] Exceptions

(none)

### [edit] 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 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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