std::unique_ptr<T,Deleter>::operator bool - cppreference.com (original) (raw)

| explicit operator bool() const noexcept; | | (since C++11) (constexpr since C++23) | | ---------------------------------------- | | ------------------------------------- |

Checks whether *this owns an object, i.e. whether get() != nullptr.

[edit] Parameters

(none)

[edit] Return value

true if *this owns an object, false otherwise.

[edit] Example

#include #include   int main() { std::unique_ptr 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

[edit] See also

| | returns a pointer to the managed object (public member function) [edit] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |