std::auto_ptr<T>:: auto_ptr

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C++
Utilities library
General utilities
Relational operators (deprecated in C++20)
Dynamic memory management
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Constrained uninitialized memory algorithms
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(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)



std::auto_ptr
explicit auto_ptr ( X * p = 0 ) throw ( ) ;
(1) (deprecated in C++11)
(removed in C++17)
auto_ptr ( auto_ptr & r ) throw ( ) ;
(2) (deprecated in C++11)
(removed in C++17)
template < class Y >
auto_ptr ( auto_ptr < Y > & r ) throw ( ) ;
(3) (deprecated in C++11)
(removed in C++17)
auto_ptr ( auto_ptr_ref < X > m ) throw ( ) ;
(4) (deprecated in C++11)
(removed in C++17)

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.

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

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 .

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