std::unique_ptr::swap

 

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std::unique_ptr

Member functions

unique_ptr::unique_ptr

unique_ptr::~unique_ptr

unique_ptr::operator=

Modifiers

unique_ptr::release

unique_ptr::reset

unique_ptr::swap

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unique_ptr::get

unique_ptr::get_deleter

unique_ptr::operator bool

unique_ptr::operator* unique_ptr::operator->

unique_ptr::operator[]

Non-member functions

operator== operator!= operator< operator> operator<= operator> operator>=

std::swap

std::hash

 

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

Swaps the managed objects and associated deleters with another unique_ptr object other.

Parameters

other

-

another unique_ptr object to swap the managed object and the deleter with

Return value

(none)

Exceptions

noexcept specification:  

noexcept

  (since C++11)

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 << std::endl;
    std::cout << "up2->val:" << up2->val << std::endl;
}

Output:

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