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std::auto_ptr::operator auto_ptr<Y>

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< cpp‎ | memory‎ | auto ptr
Revision as of 09:31, 7 May 2014 by Cubbi (Talk | contribs)

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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().

Contents

[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.