std::unique_ptr::operator bool
From cppreference.com
< cpp | memory | unique ptr
| explicit operator bool() const;
|
(since C++11) | |
Checks whether *this owns an object, i.e. whether get() != nullptr.
Contents |
[edit] Parameters
(none)
[edit] Return value
true if *this owns an object, false otherwise.
[edit] Exceptions
noexcept specification:
noexcept
[edit] Example
Run this code
#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(); if (ptr) std::cout << "after reset, ptr is: " << *ptr << '\n'; }
Output:
before reset, ptr is: 42
[edit] See also
| returns a pointer to the managed object (public member function) |