NAME¶

std::unique_ptr::swap - std::unique_ptr::swap

Synopsis¶

void swap( unique_ptr& other ) noexcept; (since C++11)

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¶

// Run this code

#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';
}

Output:¶

Foo...
Foo...
up1->val:2
up2->val:1
~Foo...
~Foo...