std::unique_ptr<T,Deleter>::swap
From cppreference.com
< cpp | memory | unique ptr
void swap( unique_ptr& other )noexcept; | (since C++11) | |
Swaps the managed objects and associated deleters of *this and another unique_ptr object other.
[edit]Parameters
| other | - | another unique_ptr object to swap the managed object and the deleter with |
[edit]Return value
(none)
[edit]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...
