Re: [boost] Re: concept archetypes

From: Victor A. Wagner, Jr. (vawjr_at_[hidden])
Date: 2002-10-16 12:52:39

At Tuesday 2002/10/15 14:47, you wrote:
>On Tuesday 15 October 2002 04:38 pm, Craig Henderson wrote:
> > "v m" <boost_vam_at_[hidden]> wrote in message
> > > 3. There are several differences between the standard
> > > and the current archetype classes, especially the
> > > iterator archetype classes. For example, almost all
> > > the relational operators (operator==, operator!= etc)
> > > have a return type of bool whereas the standard
> > > requires a return type convertible to bool. Would
> > > changing the return type have any unwanted
> > > consequences (not particularly in the
> > > concept_archetype.hpp) ?
> >
> > How is this not conforming to the standard? The return type is bool. The
> > standard requires a return type that is convertible to bool (Table 72).
> > bool is implicitly convertible to bool. What's the problem?
> > The synopsis of the iterator class in 24.2 itself defines the return type
> > as bool.
>
>It's conforming, but it's not the best possible archetype. Concept archetypes
>should push the requirements as far as possible. So the relational operators
>for the archetype should each return a unique type that is implicitly
>convertible to 'bool' (thus making sure that no code assumes that the return
>type is exactly 'bool').

My initial reaction was to simply reply "Are you on drugs?"
On second thought, maybe I should just ask you for some of whatever you're 
smoking.
I see no point in intentionally obfuscating (look it up) some things which 
are meant to be used as tools.

>         Doug
>
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Victor A. Wagner Jr.      http://rudbek.com
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