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std::auto_ptr::auto_ptr

From cppreference.com
< cpp‎ | memory‎ | auto ptr
 
 
 
Dynamic memory management
Uninitialized storage
(C++17)
(deprecated since c++17)
(deprecated since c++17)
(deprecated since c++17)
Garbage collection support
Miscellaneous
(C++11)
(C++11)
C Library
Low level memory management
 
 
explicit auto_ptr( X* p = 0 );
(1) (deprecated)
auto_ptr( auto_ptr& r );
(2) (deprecated)
template< class Y >
auto_ptr( auto_ptr<Y>& r );
(3) (deprecated)
template< class Y >
auto_ptr( auto_ptr_ref<Y> m );
(4) (deprecated)

Constructs the auto_ptr from a pointer that refers to the object to manage.

1) Constructs the auto_ptr with pointer p.
2) Constructs the auto_ptr with the pointer held in r. r.release() is called to acquire the ownership of the object.
3) Same as (2). Y* must be implicitly convertible to T*.
4) Constructs the auto_ptr with the pointer held in the auto_ptr instance referred to by m. p.release() is called for the auto_ptr p that m holds to acquire the ownership of the object.
auto_ptr_ref is an implementation-defined type that holds a reference to auto_ptr. std::auto_ptr is implicitly convertible to and assignable from this type. The implementation is allowed to provide the template with a different name or implement equivalent functionality in other ways.

[edit] Parameters

p - a pointer to an object to manage
r - another auto_ptr to transfer the ownership of the object from
m - an implementation-defined type that holds a reference to auto_ptr

[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.