std::unique_ptr<T,Deleter>:: ~unique_ptr

If get() == nullptr there are no effects. Otherwise, the owned object is destroyed via get_deleter() ( get() ) .

Requires that get_deleter()(get()) does not throw exceptions.

Notes

Although std::unique_ptr<T> with the default deleter may be constructed with incomplete type T , the type T must be complete at the point of code where the destructor is called.

Example

#include <iostream>
#include <memory>
 
int main () 
{
    auto deleter = [](int* ptr)
    {
        std::cout << "[deleter called]\n";
        delete ptr;
    };
 
    std::unique_ptr<int, decltype(deleter)> uniq(new int, deleter);
    std::cout << (uniq ? "not empty\n" : "empty\n");
    uniq.reset();
    std::cout << (uniq ? "not empty\n" : "empty\n");
}

not empty
[deleter called]
empty