From: dalanicolai <dalanicolai@gmail.com>
To: "Basil L. Contovounesios" <contovob@tcd.ie>
Cc: 47534@debbugs.gnu.org
Subject: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches upper case
Date: Thu, 1 Apr 2021 10:12:25 +0200 [thread overview]
Message-ID: <CACJP=3=LwYCJWPhWBNtXuP6EYv+eQOhRkWhniDG7+vbru=39Gg@mail.gmail.com> (raw)
In-Reply-To: <87blaz0xmm.fsf@tcd.ie>
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Ah thanks. I thought I used case sensitive replace-regexp before, but
probably I am mistaking then. Section "34.3 Regular Expressions" of the
Emacs manual states that "[a-z]" or "[:lower:]" should match only lower
case, while it is not mentioned at all that it will not work by default
(case-fold-search as well as reb-toggle-case and reb-change-syntax are not
mentioned at all in that section as far as I can find). Indeed I was
referring to the docstring of re-builder. Anyway, I am happy to provide a
patch.
On Thu, 1 Apr 2021 at 00:25, Basil L. Contovounesios <contovob@tcd.ie>
wrote:
> dalanicolai <dalanicolai@gmail.com> writes:
>
> > When using the regexp builder and trying to match only lower case
> > letters (and spaces), Emacs also includes upper case matches.
>
> I think this is the effect of the user option case-fold-search, which
> defaults to non-nil (this is the case across most search-related parts
> of Emacs, including Isearch). You can toggle it in re-builder
> specifically with C-c C-c (reb-toggle-case), or across all buffers by
> customising case-fold-search to be nil.
>
> > Also, I am unable to find in the manual any information about the
> > option of setting different syntaxes in the regexp builder
>
> I think most of the documentation for re-builder.el is in its commentary
> at the start of the file; see M-x find-library RET re-builder RET.
>
> I haven't used re-builder much, but from M-x customize-group RET
> re-builder RET I see there is a user option reb-re-syntax for
> controlling the default syntax. C-h m in the re-builder buffer further
> reveals that the command C-c C-i (reb-change-syntax) can modify
> reb-re-syntax on the fly.
>
> > (also the option is not mentioned in the regexp-builder docstring). So
> > I would additionally like to report this as a documentation bug.
>
> Are you referring to the docstring of the re-builder command, or
> something else? And is it a listing of key bindings you would like to
> see, or something else? Would you like to provide a patch with
> suggestions for improvements?
>
> Thanks,
>
> --
> Basil
>
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next prev parent reply other threads:[~2021-04-01 8:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 21:58 bug#47534: Subject: 28.0.50; Regexp lower case pattern matches upper case dalanicolai
2021-03-31 22:25 ` Basil L. Contovounesios
2021-04-01 8:12 ` dalanicolai [this message]
2021-04-01 10:27 ` dalanicolai
2021-04-01 10:27 ` dalanicolai
2021-04-01 10:30 ` dalanicolai
2021-05-08 11:59 ` Lars Ingebrigtsen
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