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Re: scratch/accurate-warning-pos: Solid progress: the branch now bootstr

From: Alan Mackenzie
Subject: Re: scratch/accurate-warning-pos: Solid progress: the branch now bootstraps.
Date: Sat, 1 Dec 2018 11:48:35 +0000
User-agent: Mutt/1.10.1 (2018-07-13)

Hello, Gemini.

On Fri, Nov 30, 2018 at 16:26:58 -0800, Gemini Lasswell wrote:
> Alan Mackenzie <address@hidden> writes:

> > Hello, Paul.

> > On Fri, Nov 30, 2018 at 09:50:09 -0800, Paul Eggert wrote:
> >> On 11/29/18 2:05 PM, Alan Mackenzie wrote:
> >> > Symbols-with-pos exists, works, and works well.  Conses-with-pos
> >> > doesn't exist, hence doesn't work.  I doubt it can work.  Can you
> >> > create it?

> >> I think I could, with time.

> > But you're not going to?

> >> I hope someone else will do it, though, as the problem does not seem
> >> that urgent. I would suggest that whoever does it, looks into Stefan's
> >> ideas in this area, e.g.,
> >> <https://lists.gnu.org/r/emacs-devel/2018-11/msg00532.html>.

> > Nobody else is going to do it, and why should they?  I've already
> > explained to you why the approach you suggest won't work, you being
> > about the only person insisting that it will.  If you actually tried it,
> > as I have, you'd soon find out that I'm right, and why.

> Saying that nobody will do it is a bit strong.


> I like Stefan's ideas, understand edebug specs, and would like to know
> more about how the byte compiler works.

I'll admit I didn't follow these ideas completely.  But I don't think
they addressed the central problem, namely how to associate source
buffer positions with the form being compiled as it flows through sets
of conses on its journey from source to byte code.

> This seems like a perfect project for that.

It's a frustrating and difficult project.  I've been trying to fix it,
on and off, since 2016.  ;-)

> But it wouldn't happen immediately, as I'd like to get my
> half-finished benchmarking tool to a state where it's usable by other
> people, before I start any other projects.

By the way, if I haven't already said it, I like this tool, despite the
timings it gave my software.  Thanks!

Alan Mackenzie (Nuremberg, Germany).

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