std::unique_ptr<T,Deleter>::~unique_ptr
Since C++11
~unique_ptr();
Since C++23
constexpr ~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");
}
Result
not empty
[deleter called]
empty