What is happening during `delete this;` statement?

Question

Please consider the following code:

class foo
{
public:
    foo(){}
    ~foo(){}
    void done() { delete this;}
private:
    int x;
};

What is

Answer 1

Both would cause an error, what you want is:

void main()
{
   foo* a = new foo();
   a->done();
}

Which the compiler will expand to something like below, which I hope makes deleting "this" a bit less confusing.

void __foo_done(foo* this)
{
   delete this;
}

void main()
{
   foo* a = new foo();
   __foo_done(a);
}

See also, Is it legal (and moral) for a member function to say delete this?