title: Is it worth setting pointers to NULL in a destructor?
body: <p>Imagine I have a class that allocates memory (forget about smart pointers for now):</p>
  
  <pre><code>class Foo
  {
  public:
    Foo() : bar(new Bar)
    {
    }
  
    ~Foo()
    {
      delete bar;
    }
  
    void doSomething()
    {
      bar-&gt;doSomething();
    }
  
  private:
    Bar* bar;
  };
  </code></pre>
  
  <p>As well as deleting the objects in the destructor is it also worth setting them to NULL?</p>
  
  <p>I'm assuming that setting the pointer to NULL in the destructor of the example above is a waste of time.</p>