Re: [boost] Review: Function library

From: Douglas Gregor (gregod_at_[hidden])
Date: 2001-06-08 10:10:26

On Friday 08 June 2001 09:12 am, you wrote:
> From: "Darin Adler" <darin_at_[hidden]>
>
> > I still don't get this "poisoning" concept. If there is no operator ==
> > declared, there is no operator ==. It's not automatically created by the
> > compile in the way that operator =, the copy constructor, the default
> > constructor, and the destructor are. Isn't that right?
>
> Another example of why implicit conversions are evil. :-)
>
> "operator const detail::undeletable* () const" will be used for the
> comparison.
>
> FWIW, I tend to agree with Darin that the if(f), f = nil, f == nil
> constructs, while useful, are not strictly necessary (considering the
> problems they introduce) - the explicit empty(), clear() methods are fine.
>
> --
> Peter Dimov
> Multi Media Ltd.

Which problems do they introduce? Unless there are serious problems with the 
nil/null type (such that it won't be adopted), I'm not sure I see any further 
problems with the operators.

        Doug