std::unique_ptr<T,Deleter>::operator bool
explicit operator bool() const noexcept; |
(since C++11) (constexpr since C++23) |
Checks whether *this owns an object, i.e. whether get() != nullptr.
Parameters
(none).
Return value
true if *this owns an object, false otherwise.
Example
#include <iostream>
#include <memory>
int main()
{
std::unique_ptr<int> ptr(new int(42));
if (ptr) std::cout << "before reset, ptr is: " << *ptr << '\n';
ptr.reset();
ptr ? (std::cout << "after reset, ptr is: " << *ptr)
: (std::cout << "after reset ptr is empty") << '\n';
}
Output:
before reset, ptr is: 42 after reset ptr is empty
See also
| returns a pointer to the managed object (public member function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/memory/unique_ptr/operator_bool
