GNU logs - #63438, boring messages

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Subject: bug#63438: 30.0.50; abbrev mode wrongly capitalizes with mixed capitalized words
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Recipe for recreating:

- Add some abbrev definition with mixed capitalization, e.g. "abc"
should expand to "aBC".
- Enable abbrev-mode. 
- Write "aBC".
- Upon pressing space, abbrev-mode converts it into "ABC". 

There is a code section in `abbrev-insert' that explicitly capitalizes
the first letter; I'm sure it's there for a reason but I think the
behavior I showed is unexpected. As for the example "aBC", there are
real use cases, just to mention one "iPhone".

-- 
Daniel Fleischer

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To: Daniel Fleischer <danflscr@HIDDEN>
Subject: bug#63438: Acknowledgement (30.0.50; abbrev mode wrongly
 capitalizes with mixed capitalized words)
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Subject: bug#63438: 30.0.50; abbrev mode wrongly capitalizes with mixed capitalized words
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Date: Thu, 11 May 2023 11:29:59 +0300
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From: Eli Zaretskii <eliz@HIDDEN>
In-Reply-To: <m235431gy7.fsf@HIDDEN> (message from Daniel Fleischer on Thu, 
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severity 63438 wishlist
thanks

> From: Daniel Fleischer <danflscr@HIDDEN>
> Date: Thu, 11 May 2023 10:10:40 +0300
> 
> Recipe for recreating:
> 
> - Add some abbrev definition with mixed capitalization, e.g. "abc"
> should expand to "aBC".
> - Enable abbrev-mode. 
> - Write "aBC".
> - Upon pressing space, abbrev-mode converts it into "ABC". 
> 
> There is a code section in `abbrev-insert' that explicitly capitalizes
> the first letter; I'm sure it's there for a reason but I think the
> behavior I showed is unexpected. As for the example "aBC", there are
> real use cases, just to mention one "iPhone".

What you see is the documented behavior: by default, if the abbrev was
triggered by a word that has some upper-case letters in it, Emacs
capitalizes the first letter of every word in the expansion (you can
optionally set abbrev-all-caps non-nil to up-case all the letters in
the expansion).  In your case, capitalizing the first letter of "aBC"
yields "ABC", and that's what you see.

What did you expect to happen instead?

Message received at control <at> debbugs.gnu.org:

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Date: Thu, 11 May 2023 11:29:59 +0300
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From: Eli Zaretskii <eliz@HIDDEN>
To: Daniel Fleischer <danflscr@HIDDEN>
In-Reply-To: <m235431gy7.fsf@HIDDEN> (message from Daniel Fleischer on Thu, 
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Subject: Re: bug#63438: 30.0.50;
 abbrev mode wrongly capitalizes with mixed capitalized words
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severity 63438 wishlist
thanks

> From: Daniel Fleischer <danflscr@HIDDEN>
> Date: Thu, 11 May 2023 10:10:40 +0300
> 
> Recipe for recreating:
> 
> - Add some abbrev definition with mixed capitalization, e.g. "abc"
> should expand to "aBC".
> - Enable abbrev-mode. 
> - Write "aBC".
> - Upon pressing space, abbrev-mode converts it into "ABC". 
> 
> There is a code section in `abbrev-insert' that explicitly capitalizes
> the first letter; I'm sure it's there for a reason but I think the
> behavior I showed is unexpected. As for the example "aBC", there are
> real use cases, just to mention one "iPhone".

What you see is the documented behavior: by default, if the abbrev was
triggered by a word that has some upper-case letters in it, Emacs
capitalizes the first letter of every word in the expansion (you can
optionally set abbrev-all-caps non-nil to up-case all the letters in
the expansion).  In your case, capitalizing the first letter of "aBC"
yields "ABC", and that's what you see.

What did you expect to happen instead?

Message sent to bug-gnu-emacs@HIDDEN:

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From: Daniel Fleischer <danflscr@HIDDEN>
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Eli Zaretskii [2023-05-11 Thu 11:29] wrote:

> What you see is the documented behavior: by default, if the 
> abbrev was
> triggered by a word that has some upper-case letters in it, 
> Emacs
> capitalizes the first letter of every word in the expansion (you 
> can
> optionally set abbrev-all-caps non-nil to up-case all the 
> letters in
> the expansion).  In your case, capitalizing the first letter of 
> "aBC"
> yields "ABC", and that's what you see.
>
> What did you expect to happen instead?

I would expect *nothing* to happen; abbrev is key-value mapping; 
you
write a key and it replaces it with a value. If you write a word 
that
is not a key, you expect nothing to happen. In this case, the word 
is
one of the values, and suddenly something happens, unexpectedly. I
know realize that words are compared with keys ignoring the case, 
but
using the case in the expansion. Still, if a user writes a word
identical to one the abbrev "keys", I would expect abbrev to leave 
it
as is. 

Thanks, 

Daniel

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> From: Daniel Fleischer <danflscr@HIDDEN>
> Cc: 63438 <at> debbugs.gnu.org
> Date: Thu, 11 May 2023 12:00:39 +0300
> 
> 
> Eli Zaretskii [2023-05-11 Thu 11:29] wrote:
> 
> > What did you expect to happen instead?
> 
> I would expect *nothing* to happen; abbrev is key-value mapping; you
> write a key and it replaces it with a value. If you write a word
> that is not a key, you expect nothing to happen. In this case, the
> word is one of the values, and suddenly something happens,
> unexpectedly. I know realize that words are compared with keys
> ignoring the case, but using the case in the expansion. Still, if a
> user writes a word identical to one the abbrev "keys", I would
> expect abbrev to leave it as is.

I guess there's a place for a new defcustom, under which no
case-conversion will happen at abbrev expansion time, ever.  Is that
what you want?  That is, if you have an abbrev foo -> foobarical, then
typing "Foo" or "FOO" will produce a literal "foobarical", each and
every time?

Message sent to bug-gnu-emacs@HIDDEN:

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From: Daniel Fleischer <danflscr@HIDDEN>
Date: Thu, 11 May 2023 14:03:43 +0300
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--=-=-=
Content-Type: text/plain
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Eli Zaretskii [2023-05-11 Thu 13:39]  wrote:

> I guess there's a place for a new defcustom, under which no
> case-conversion will happen at abbrev expansion time, ever.  Is that
> what you want?  That is, if you have an abbrev foo -> foobarical, then
> typing "Foo" or "FOO" will produce a literal "foobarical", each and
> every time?

I think even simpler: make sure abbrev insertion only works when the
input word is strictly (case sensitive) different than the expansion
word; leave everything else as is.

Example: with a rule like "foobarical -> fooBarical" then 

Foobarical -> FooBarical (as is today)
FOOBARICAL -> FOOBARICAL (as is today)

but fooBarical -> fooBarical, because it's already what we want. 

--=-=-=--

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Daniel Fleischer [2023-05-11 Thu 14:03] wrote:

> Example: with a rule like "foobarical -> fooBarical" then 
>
> Foobarical -> FooBarical (as is today)
> FOOBARICAL -> FOOBARICAL (as is today)
>
> but fooBarical -> fooBarical, because it's already what we want. 

Maybe some context: I think some people, at least me, use abbrev mode to
properly capitalize words with unique casing, needs not met by regular
capitalization rules. It means abbrev keys and values sometimes contain
the same word but with different casing. That's why I want nothing to
happen when the user writes a word with the right casing, making an
abbrev expansion unnecessary. 

-- 
Daniel Fleischer

Last modified: Thu, 11 May 2023 11:30:02 UTC

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