std::unique_ptr<T,Deleter>::operator bool

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

# Declarations

explicit operator bool() const noexcept;

(since C++11) (constexpr since C++23)

# 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';
}

# See also