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Re: non word abbrevs
From: |
Stefan Monnier |
Subject: |
Re: non word abbrevs |
Date: |
Mon, 01 Nov 2021 08:43:14 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
>>> :regexp "\(<?[-=]>?\)")
>>> I must be missing something.
>> Hmmm... backslashes? ;-)
>> The above string is the same as "(<?[-=]>?)" (in recentish Emacsen the
>> above backslashes should presumably be highlighted in
>> a font-lock-warning color for that reason).
>
> I'm trying in *scratch* with lisp-mode on a recent "master" and I don't get
> that...
I just tried it on my end with both `master` and Emacs-27.1
emacs -Q
:regexp "\(<?[-=]>?\)")
and the two backslashes got the `font-lock-warning-face` (the strings
are colored a kind of brick red and the warning is in red so it doesn't
stand out as much as I'd like but it's visible).
I wonder why you don't see that on your end.
> :regexp "\\([<>=-]+\\)"
And since Emacs will only use the shortest match, it will only use
one-char-long matches :-(
Try something like: "[^<>=-]\\([<>=-]+\\)"
[ Yes, this shortest match business is a PITA. ]
> (setq local-abbrev-table arrows-abbrev-table)
>
> And I get a nice message that reads like this:
>
> [## 0 0 0 0 0 0 0 0 0 0 <== <=> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ==>
> 0 0 0 0 0 0 0 0 0 <- 0 0 0 0 0 0 0 0 <-> 0 0 0 -> 0 0 0]
That's just the printed version of the vector that's used as an
"obarray". It's mostly meaningless.
> And I guess that's a list that includes possible matches but I'm not seeing
> => / <= so I wonder.
As I said it's mostly meaningless: it includes *some* of the symbols but
not all. I had a patch which introduced a real obarray type (instead
of abusing vectors), which could then be printed "properly", a bit like
hash tables, but it had its share of problems.
> Then, I enable abbrev-mode but nothing gets transformed...
That's because it only single-char matches occurred and you had no
single-char abbrev defined?
Stefan
- Re: non word abbrevs, Jean-Christophe Helary, 2021/11/01
- Re: non word abbrevs, Emanuel Berg, 2021/11/01
- Re: non word abbrevs, Stefan Monnier, 2021/11/01
- Re: non word abbrevs, Jean-Christophe Helary, 2021/11/06
- Re: non word abbrevs, Stefan Monnier, 2021/11/06
- Re: non word abbrevs, Jean-Christophe Helary, 2021/11/06
- Re: non word abbrevs, Stefan Monnier, 2021/11/06
- Re: non word abbrevs, Jean-Christophe Helary, 2021/11/06
- Re: non word abbrevs, Emanuel Berg, 2021/11/07