std::unique_ptr<T,Deleter>::swap
From cppreference.com
< cpp | memory | unique ptr
C++
Utilities library
|
|
Dynamic memory management
|
|
std::unique_ptr
Member functions | ||||
Modifiers | ||||
unique_ptr::swap | ||||
Observers | ||||
Non-member functions | ||||
(C++14)(C++20) | ||||
(until C++20)(C++20) | ||||
(C++20) | ||||
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...