std::unique_ptr<T,Deleter>::get_deleter - cppreference.com (original) (raw)
| Deleter& get_deleter() noexcept; | | (since C++11) (constexpr since C++23) | | --------------------------------------------- | | ------------------------------------- | | const Deleter& get_deleter() const noexcept; | | (since C++11) (constexpr since C++23) |
Returns the deleter object which would be used for destruction of the managed object.
[edit] Parameters
(none)
[edit] Return value
The stored deleter object.
[edit] Example
#include
#include
struct Foo
{
Foo() { std::cout << "Foo() 0x" << std::hex << (void*)this << '\n'; }
Foo() { std::cout << "Foo() 0x" << std::hex << (void*)this << '\n'; }
};
struct D
{
int number;
void bar()
{
std::cout << "call D::bar(), my number is: " << std::dec << number << '\n';
}
void operator()(Foo* p) const
{
std::cout << "call deleter for Foo object 0x" << std::hex << (void*)p << '\n';
delete p;
}
};
int main()
{
std::cout << "main start\n";
std::unique_ptr<Foo, D> up1(new Foo(), D(42));
D& del1 = up1.get_deleter();
del1.bar();
std::unique_ptr<Foo, D> up2(new Foo(), D(43));
D& del2 = up2.get_deleter();
auto* released = up2.release();
del2(released);
std::cout << "main end\n";
}
Output:
main start Foo() 0x0x90cc30 call D::bar(), my number is: 42 Foo() 0x0x90cc50 call deleter for Foo object 0x0x90cc50 ~Foo() 0x0x90cc50 main end call deleter for Foo object 0x0x90cc30 ~Foo() 0x0x90cc30
[edit] See also
| | returns the deleter of specified type, if owned (function template) [edit] | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |