std::auto_ptr::operator=
From cppreference.com
| auto_ptr& operator=( auto_ptr& r ); |
(1) | (deprecated) |
| template< class Y > auto_ptr& operator=( auto_ptr<Y>& r ); |
(2) | (deprecated) |
| auto_ptr& operator=( auto_ptr_ref m ); |
(3) | (deprecated) |
Replaces the managed object with the one managed by r.
1) Effectively calls reset(r.release()).
2) Effectively calls reset(r.release()). Y* must be implicitly convertible to T*.
3) Effectively calls reset(m.release()).
auto_ptr_ref is an implementation-defined type that holds a reference to auto_ptr. std::auto_ptr is implicitly convertible to and from this type. The implementation is allowed to provide the template with a different name or implement equivalent functionality in other ways.Parameters
| r | - | another auto_ptr to transfer the ownership of the object from
|
| m | - | an implementation-defined type that holds a reference to auto_ptr
|
Return value
*this.
Exceptions
(none)
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.