#include <memory>
#include <cstdio>
 
struct MyClass {
	int i;
	MyClass(int i_) noexcept : i(i_) {}
	~MyClass() { std::printf("Destroyed %d!\n", i); }
	};
 
int main() {
	using std::shared_ptr;
	using std::static_pointer_cast;
 
	void* rawPtr = new MyClass(1);
	shared_ptr<void> exampleVoid(rawPtr); // Undefined behavior;
	                                      // calls delete (void*)ptr;
 
	shared_ptr<void> exampleVoidCons(new MyClass(2));
	    // OK, calls shared_ptr<void>::shared_ptr<MyClass>(MyClass*) which
	    // makes a deleter calling delete (MyClass*)ptr;
 
	shared_ptr<MyClass> example(new MyClass(3)); // OK, calls delete (MyClass*)ptr;
 
	shared_ptr<void> castToVoid = static_pointer_cast<void>(example);
	    // OK, shared_ptr's deleter is erased so this still calls delete (MyClass*)ptr;
}

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