GNU bug report logs - #47534
Subject: 28.0.50; Regexp lower case pattern matches upper case

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: dalanicolai <dalanicolai <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Subject: 28.0.50; Regexp lower case pattern matches upper case
Date: Wed, 31 Mar 2021 23:58:34 +0200

[Message part 1 (text/plain, inline)]

When using the regexp builder and trying to match only lower case
letters (and spaces), Emacs also includes upper case matches. See attached
image (the regexp builder syntax in the image is set to string, but it
happens with other syntaxes too)
[image: image.png]

Also, I am unable to find in the manual any information about the option of
setting different syntaxes in the regexp builder (also the option is not
mentioned in the regexp-builder docstring). So I would additionally like to
report this as a documentation bug. (I am reporting it here, because maybe
I did not search clever enough, but anyway then it is really hard to find
for me.
Let me know if you would like me to report this separately.)

In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.25,
cairo version 1.16.0)
 of 2021-02-18 built on daniel-fedora
Repository revision: 185121da6978553d538d37d6d0e67dc52e13311f
Repository branch: feature/native-comp
Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
System Description: Fedora 34 (Workstation Edition Prerelease)

Configured using:
 'configure --with-nativecomp'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP
NOTIFY INOTIFY PDUMPER PNG RSVG SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
X11 XDBE XIM XPM GTK3 ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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Load-path shadows:
None found.

Features:
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lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
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cairo move-toolbar gtk x-toolkit x multi-tty make-network-process
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Memory information:
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[Message part 2 (text/html, inline)]

[image.png (image/png, inline)]

Message #8 received at 47534 <at> debbugs.gnu.org (full text, mbox):

From: "Basil L. Contovounesios" <contovob <at> tcd.ie>
To: dalanicolai <dalanicolai <at> gmail.com>
Cc: 47534 <at> debbugs.gnu.org
Subject: Re: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches
 upper case
Date: Wed, 31 Mar 2021 23:25:05 +0100

dalanicolai <dalanicolai <at> 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

Message #11 received at 47534 <at> debbugs.gnu.org (full text, mbox):

From: dalanicolai <dalanicolai <at> gmail.com>
To: "Basil L. Contovounesios" <contovob <at> tcd.ie>
Cc: 47534 <at> debbugs.gnu.org
Subject: Re: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches
 upper case
Date: Thu, 1 Apr 2021 10:12:25 +0200

[Message part 1 (text/plain, inline)]

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 <at> tcd.ie>
wrote:

> dalanicolai <dalanicolai <at> 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
>

[Message part 2 (text/html, inline)]

Message #14 received at 47534 <at> debbugs.gnu.org (full text, mbox):

From: dalanicolai <dalanicolai <at> gmail.com>
To: "Basil L. Contovounesios" <contovob <at> tcd.ie>
Cc: 47534 <at> debbugs.gnu.org
Subject: Re: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches
 upper case
Date: Thu, 1 Apr 2021 12:27:25 +0200

[Message part 1 (text/plain, inline)]

Here is a small patch for the re-builder docstring. I hope I did things
correctly...

On Thu, 1 Apr 2021 at 10:12, dalanicolai <dalanicolai <at> gmail.com> wrote:

> 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 <at> tcd.ie>
> wrote:
>
>> dalanicolai <dalanicolai <at> 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
>>
>

[Message part 2 (text/html, inline)]

[re-builder-improve-docstring (application/octet-stream, attachment)]

Message #17 received at 47534 <at> debbugs.gnu.org (full text, mbox):

From: dalanicolai <dalanicolai <at> gmail.com>
To: "Basil L. Contovounesios" <contovob <at> tcd.ie>
Cc: 47534 <at> debbugs.gnu.org
Subject: Re: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches
 upper case
Date: Thu, 1 Apr 2021 12:27:58 +0200

[Message part 1 (text/plain, inline)]

And here is a small patch for the docs

On Thu, 1 Apr 2021 at 12:27, dalanicolai <dalanicolai <at> gmail.com> wrote:

> Here is a small patch for the re-builder docstring. I hope I did things
> correctly...
>
> On Thu, 1 Apr 2021 at 10:12, dalanicolai <dalanicolai <at> gmail.com> wrote:
>
>> 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 <at> tcd.ie>
>> wrote:
>>
>>> dalanicolai <dalanicolai <at> 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
>>>
>>

[Message part 2 (text/html, inline)]

[improve-regexp-doc-add-note-case-sensitive (application/octet-stream, attachment)]

Message #20 received at 47534 <at> debbugs.gnu.org (full text, mbox):

From: dalanicolai <dalanicolai <at> gmail.com>
To: "Basil L. Contovounesios" <contovob <at> tcd.ie>
Cc: 47534 <at> debbugs.gnu.org
Subject: Re: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches
 upper case
Date: Thu, 1 Apr 2021 12:30:39 +0200

[Message part 1 (text/plain, inline)]

Of course any feedback on the code (well... text)  or my workflow is very
welcome.

On Thu, 1 Apr 2021 at 12:27, dalanicolai <dalanicolai <at> gmail.com> wrote:

> And here is a small patch for the docs
>
> On Thu, 1 Apr 2021 at 12:27, dalanicolai <dalanicolai <at> gmail.com> wrote:
>
>> Here is a small patch for the re-builder docstring. I hope I did things
>> correctly...
>>
>> On Thu, 1 Apr 2021 at 10:12, dalanicolai <dalanicolai <at> gmail.com> wrote:
>>
>>> 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 <at> tcd.ie>
>>> wrote:
>>>
>>>> dalanicolai <dalanicolai <at> 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
>>>>
>>>

[Message part 2 (text/html, inline)]

Message #25 received at 47534 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: dalanicolai <dalanicolai <at> gmail.com>
Cc: "Basil L. Contovounesios" <contovob <at> tcd.ie>, 47534 <at> debbugs.gnu.org
Subject: Re: bug#47534: Subject: 28.0.50; Regexp lower case pattern matches
 upper case
Date: Sat, 08 May 2021 13:59:22 +0200

dalanicolai <dalanicolai <at> gmail.com> writes:

> And here is a small patch for the docs

Thanks; both patches applied to Emacs 28 (with some changes).

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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