In "Simplifying the use of concepts", Bjarne Stroustrup mentions the
=93Are concepts required of Joe Coder?=94 thread.
Where can I find more information about this thread? (Google had just
one hit for "Are concepts required of Joe Coder?=94, and this was
Stroustrup's paper)

Helmut


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Helmut Zeisel <zei2006q1@liwest.at> writes:

> In "Simplifying the use of concepts", Bjarne Stroustrup mentions the
> =93Are concepts required of Joe Coder?=94 thread.
> Where can I find more information about this thread? (Google had just
> one hit for "Are concepts required of Joe Coder?=94, and this was
> Stroustrup's paper)

This was a thread on the committee reflectors, and is not publicly
available.

Anthony
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Author of C++ Concurrency in Action | http://www.manning.com/williams
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On Aug 4, 9:15 pm, Anthony Williams <anthony....@gmail.com> wrote:
> Helmut Zeisel <zei200...@liwest.at> writes:
> > In "Simplifying the use of concepts", Bjarne Stroustrup mentions the
> > =93Are concepts required of Joe Coder?=94 thread.
> > Where can I find more information about this thread? (Google had just
> > one hit for "Are concepts required of Joe Coder?=94, and this was
> > Stroustrup's paper)
>
> This was a thread on the committee reflectors, and is not publicly
> available.

I see. Is it possible to publish some parts of the discussion (maybe
in this newsgroup)?
In particular, I would be intereseted in Howard Hinnant's original
"design (of a utility) that could be done in two ways" to get better
understanding of the current problems with concepts.

Helmut



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On Aug 5, 5:20 pm, Helmut Zeisel <zei200...@liwest.at> wrote:
> > This was a thread on the committee reflectors, and is not publicly
> > available.
>
> I see. Is it possible to publish some parts of the discussion (maybe
> in this newsgroup)?
> In particular, I would be intereseted in Howard Hinnant's original
> "design (of a utility) that could be done in two ways" to get better
> understanding of the current problems with concepts.

I am not at liberty to publish this discussion (which was quite
lengthy).  But I do feel I can publish my own words which
(unintentionally) kicked off the discussion.  I did not have a
"design".  I had a question about how we should move an existing
design into the world of concepts:

> There exists some motivation to formulate the Clock concept (ref Table
> in [time.clock.req]) in such a way that if the client wanted to create a
> clock, he would need to use concepts, probably a concept_map
> std::Clock<MyClock>.  But this raises a question:  What if the client of
> MyClock has some (possibly unforeseen) motivation to not want to use
> concepts?  Can he now not create a clock which can interoperate with
> conceptified code such as:
>
> template <Clock C, Duration D>
>   void sleep_until(const chrono::time_point<C, D>& abs_time);
>
> ?
>
> std::sleep_until was designed to work with user-written clocks, and I
> would hate to see that functionality unintentionally curtailed.

I do not believe the publication of this question will give anyone
further insights.  The discussion quickly veered away from this
specific question.  But I publish it anyway in the spirit of
openness.

-Howard


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