1 #include <iostream>
2 #include <memory>
3
4 struct Foo
5 {
6 Foo() { std::cout << "Foo...\n"; }
7 ~Foo() { std::cout << "~Foo...\n"; }
8 };
9
10 struct D
11 {
12 void operator()(Foo *p)
13 {
14 std::cout << "Calling delete for Foo object... \n";
15 delete p;
16 }
17 };
18
19 int main()
20 {
21 std::cout << "Creating new Foo...\n";
22
23 //up owns the Foo pointer (deleter D)
24 std::unique_ptr<Foo, D> up(new Foo(), D());
25
26 std::cout << "Replace owned Foo with a new Foo...\n";
27 up.reset(new Foo()); // calls deleter for the old one
28
29 std::cout << "Release and delete the owned Foo...\n";
30 up.reset(nullptr);
31 }
32
33 // Creating new Foo...
34 // Foo...
35 // Replace owned Foo with a new Foo...
36 // Foo...
37 // Calling delete for Foo object...
38 // ~Foo...
39 // Release and delete the owned Foo...
40 // Calling delete for Foo object...
41 // ~Foo...
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