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Re: Correct line/column numbers in byte compiler messages [Was: GNU is l
From: |
Alan Mackenzie |
Subject: |
Re: Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects] |
Date: |
Fri, 20 Mar 2020 19:18:46 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Hello, Andrea.
On Thu, Mar 19, 2020 at 20:43:15 +0000, Andrea Corallo wrote:
> Alan Mackenzie <address@hidden> writes:
> > "More precise line numbers" is a misconstruction, even though I've used
> > such language myself in the past. Line numbers don't come from a
> > physical instrument which measures with, say +-1% accuracy. CORRECT
> > line (and column) numbers are what we need.
> > You will recall that the output of correct line/column numbers for byte
> > compiler messages is a solved problem. I solved it and presented the
> > fix in December 2018. This fix was rejected because it made Emacs
> > slightly slower.
> > In the 3½ years I've been grappling with this problem, I've tried all
> > sorts of things like "fat cons cells". They don't work, and can't work.
> > They can't work because large chunks of our software chew up and spit
> > out cons cells with gay abandon (I'm talking about the byte compiler and
> > things like cconv.el here). More to the point, users' macros chew up and
> > spit out cons cells, and we have no control over them. So whilst we
> > could, with a lot of tedious effort, clean up our own software to
> > preserve cons cells (believe me, I've tried), this would fail in users'
> > macros.
> > Since then I've worked a fair bit on creating a "double" Emacs core, one
> > core being for normal use, the other for byte compiling. There's a fair
> > amount of work still to do on this, but I know how to do it. The problem
> > is that I have been discouraged by the prospect of having this solution
> > vetoed too, since it will make Emacs quite a bit bigger.
> > I don't think it is fair to give this problem to a group of summer
> > coders. It is too hard a problem, both technically and politically.
> Hi Alan,
> Sorry I'm new to Emacs development, where can be found the code of your
> attempt? Is it in a feature branch?
It's in the branch scratch/accurate-warning-pos. The commit which
converted the unfinished work to a bug fix was:
commit 2e04ddadab266d245a3bd0f6c19223ea515bdb90
Author: Alan Mackenzie <address@hidden>
Date: Fri Nov 30 14:55:48 2018 +0000
Sundry amendments to branch scratch/accurate-warning-pos.
(except, I think it still outputs two positions for each warning
message: the traditional one, and the new correct one).
> Thanks
> Andrea
> --
> address@hidden
--
Alan Mackenzie (Nuremberg, Germany).
- GNU is looking for Google Summer of Code Projects, Rocky Bernstein, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Stefan Monnier, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Andrea Corallo, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Andrea Corallo, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Rocky Bernstein, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Stefan Monnier, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Andrea Corallo, 2020/03/19
- Re: GNU is looking for Google Summer of Code Projects, Rocky Bernstein, 2020/03/19
- Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects], Alan Mackenzie, 2020/03/19
- Re: Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects], Andrea Corallo, 2020/03/19
- Re: Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects],
Alan Mackenzie <=
- Re: Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects], Andrea Corallo, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Alan Mackenzie, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Andrea Corallo, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Andrea Corallo, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Alan Mackenzie, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Andrea Corallo, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Andrea Corallo, 2020/03/21
- Re: Correct line/column numbers in byte compiler messages, Alan Mackenzie, 2020/03/22
- Re: Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects], Rocky Bernstein, 2020/03/19
- Re: Correct line/column numbers in byte compiler messages [Was: GNU is looking for Google Summer of Code Projects], Stefan Monnier, 2020/03/19