Skip to main content

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

Deprecated in C++11, Removed in C++17
template< class Y >
operator auto_ptr_ref<Y>() throw();     (1)	

template< class Y >
operator auto_ptr<Y>() throw();         (2)

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. A 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 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.

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

Deprecated in C++11, Removed in C++17
template< class Y >
operator auto_ptr_ref<Y>() throw();     (1)	

template< class Y >
operator auto_ptr<Y>() throw();         (2)

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. A 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 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.