std::shared_ptr<T>::operator bool
From cppreference.com
explicit operator bool() const noexcept;
|
(constexpr since C++26) | |
Checks if *this stores a non-null pointer.
Return value
get() != nullptr
Notes
An empty shared_ptr (where use_count() == 0) may store a non-null pointer accessible by get(), e.g. if it were created using the aliasing constructor.
Example
Run this code
#include <iostream>
#include <memory>
void report(std::shared_ptr<int> ptr)
{
if (ptr)
std::cout << "*ptr = " << *ptr << "\n";
else
std::cout << "ptr is not a valid pointer.\n";
}
int main()
{
std::shared_ptr<int> ptr;
report(ptr);
ptr = std::make_shared<int>(7);
report(ptr);
}
Output:
ptr is not a valid pointer.
*ptr=7
See also
| returns the stored pointer (public member function) |