Re: [boost] g++ 2.95.3's STL breaks operator!=

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-02-09 11:27:57

----- Original Message -----
From: "Peter Dimov" <pdimov_at_[hidden]>

> > Considering that shared_ptr<> implicit upcasts now actually *work*, it
> seems
> > like a good idea to make comparisons work, too. I don't see how it's
going
> > to break backwards compatibility, anyway. What am I missing?
>
> Hmm.
>
> We now have
>
> template<typename T, typename U> inline bool operator==(shared_ptr<T>
const
> & a, shared_ptr<U> const & b)
> {
>     return a.get() == b.get();
> }
>
> that works for different T and U, but only when the pointer comparison is
> legal.
>
> Are you suggesting that we make operator== work for any unrelated T and U
by
> comparing the count? It can be done but the NULL needs to be handled
> separately fro compatibility.

I think what I'm actually suggesting is that my brain has ceased to function
and I now type random suggestions to the list like a roomful of monkeys
working on Hamlet.

-Dave