delete a NULL pointer does not call overloaded delete when destructor is written

Question

class Widget
{
    public:
        Widget() {
            cout<<\"~Widget()\"<

        

Answer 1

The object destructor is called before the delete operator. So my guess would be that it tries to call the destructor, realizes that the pointer is NULL therefore

1. doesn't call destructor which needs an instance
2. stops the deleteing operation there (kind of speed optimization IMHO).

As Neil said, if w contains a Widget, it should work.