Re: [Boost-users] [Range] Adaptors

Subject: Re: [Boost-users] [Range] Adaptors
From: Dave Abrahams (dave_at_[hidden])
Date: 2011-01-06 10:48:48

At Thu, 6 Jan 2011 15:17:01 +0000,
Robert Jones wrote:
> 
> > > the final use of operator|() seems to pretty much imply eagerness in the
> > > same way that the for_each() does.
> >
> > Only if you happen to know that f is a function and will be treated
> > completely differently from the range adaptors.
> >
> >
> Absolutely, now we're on the same page. There must be some
> identifiable quality of the last element of the pipeline that
> indicates that it is a consumer of the elements of the range. I'm
> unsure that any such reasonable test could be devised, which is what
> makes such a facility hard to write.

Oh, I'm not worried that the implementation is hard.  I'm worried
about humans.  That idiom that has a particular syntactic->semantic
relationship, and you're talking about introducing a major
inconsistency.

It's not necessarily horrible, but that's my concern.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com