std::unique_ptr<T,Deleter>::swap
void swap( unique_ptr& other ) noexcept;
Swaps the managed objects and associated deleters of *this
and another unique_ptr
object other.
Parameters
other
- another unique_ptr object to swap the managed object and the deleter with
Return value
(none)
Example
#include <iostream>
#include <memory>
struct Foo {
Foo(int _val) : val(_val) { std::cout << "Foo...\n"; }
~Foo() { std::cout << "~Foo...\n"; }
int val;
};
int main()
{
std::unique_ptr<Foo> up1(new Foo(1));
std::unique_ptr<Foo> up2(new Foo(2));
up1.swap(up2);
std::cout
<< "up1->val:"
<< up1->val << '\n';
std::cout
<< "up2->val:"
<< up2->val << '\n';
}
Result
Foo...
Foo...
up1->val:2
up2->val:1
~Foo...
~Foo...