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std::shared...operatorbool(3) C++ Standard Libarystd::shared...operatorbool(3) NAME std::shared_ptr::operatorbool - std::shared_ptr::operatorbool Synopsis explicit operator bool() const noexcept; Checks if *this stores a non-null pointer, i.e. whether get() != nullptr. Parameters (none) Return value true if *this stores a pointer, false otherwise. 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 get returns the stored pointer (public member function) http://cppreference.com 2022.07.31 std::shared...operatorbool(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Output: | See also
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