std::unique_ptr<T,Deleter>::operator bool - cppreference.com
From cppreference.com
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(since C++11) (constexpr since C++23) |
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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) [edit] |