Re: [boost] Interest for a perl6-like-junctions-class?

From: Rob Stewart (stewart_at_[hidden])
Date: 2005-08-10 13:35:55

From: David Abrahams <dave_at_[hidden]>
> Rob Stewart <stewart_at_[hidden]> writes:
> 
> > Thus, all_of({1, 2, 3}) < any_of({3, 4}) means:
> >
> >    1 < 3: true
> >    2 < 3: true
> >    3 < 3: false
> >    1 < 4: true
> >    2 < 4: true
> >    3 < 4: true
> >    result: true
> >
> > But, each_of({1, 2, 3}) < any_of({3, 4}) means:
> >
> >    1 < 3: true
> >    2 < 3: true
> >    3 < 3: false
> >    3 < 4: true
> >    result: true
> 
> IMO that's terribly confusing.  The first one should be 
> 
>   all_of({1, 2, 3}) < one_of({3, 4})    
> 
> And the second one should be 
> 
>   all_of({1, 2, 3}) < any_of({3, 4})    

Hmmmm.  That is what I'm after, isn't it.  Fine: we should
forget about each_of.  Users simply need to formulate the
expression correctly with the other operations.

I'll have to look at the implementation to ensure we get that
behavior when those types are mixed.

-- 
Rob Stewart                           stewart_at_[hidden]
Software Engineer                     http://www.sig.com
Susquehanna International Group, LLP  using std::disclaimer;