auto_ptr::auto_ptr
The constructor for objects of type auto_ptr.
explicit auto_ptr(
Type* _Ptr = 0
) throw( );
auto_ptr(
auto_ptr<Type>& _Right
) throw( );
auto_ptr(
auto_ptr_ref<Type> _Right
) throw( );
template<class Other>
auto_ptr(
auto_ptr<Other>& _Right
) throw( );
Parameters
_Ptr
The pointer to the object that auto_ptr encapsulates._Right
The auto_ptr object to be copied by the constructor.
Remarks
The first constructor stores _Ptr in myptr, the stored pointer to the allocated object. The second constructor transfers ownership of the pointer stored in _Right, by storing _Right.release in myptr.
The third constructor behaves the same as the second, except that it stores right.ref.release in myptr, where ref is the reference stored in _Right.
The template constructor behaves the same as the second constructor, provided that a pointer to Other can be implicitly converted to a pointer to Type.
Example
// auto_ptr_auto_ptr.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
#include <vector>
using namespace std;
class Int
{
public:
Int(int i)
{
cout << "Constructing " << ( void* )this << endl;
x = i;
bIsConstructed = true;
};
~Int( )
{
cout << "Destructing " << ( void* )this << endl;
bIsConstructed = false;
};
Int &operator++( )
{
x++;
return *this;
};
int x;
private:
bool bIsConstructed;
};
void function ( auto_ptr<Int> &pi )
{
++( *pi );
auto_ptr<Int> pi2( pi );
++( *pi2 );
pi = pi2;
}
int main( )
{
auto_ptr<Int> pi ( new Int( 5 ) );
cout << pi->x << endl;
function( pi );
cout << pi->x << endl;
}
Constructing 00311AF8 5 7 Destructing 00311AF8
Requirements
Header: <memory>
Namespace: std