std::auto_ptr<T>::operator=
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auto_ptr& operator=
( auto_ptr& r )
throw
(
)
;
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(1) | (deprecated in C++11) (removed in C++17) |
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template
<
class Y >
auto_ptr& operator= ( auto_ptr<Y> & r ) throw ( ) ; |
(2) | (deprecated in C++11) (removed in C++17) |
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auto_ptr& operator=
( auto_ptr_ref<T> m )
throw
(
)
;
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(3) | (deprecated in C++11) (removed in C++17) |
Replaces the managed object with the one managed by r or m.
Y* must be implicitly convertible to T*
auto_ptr_ref is an implementation-defined type that holds a reference to auto_ptr. std::auto_ptr is implicitly convertible to and from
Parameters
| r | - | another auto_ptr to transfer the ownership of the object from
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| m | - | an object of implementation-defined type that holds a reference to auto_ptr
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Return value
*this.
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
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 127 | C++98 | auto_ptr was not assignable from auto_ptr_ref
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added overload (3) |