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Subject: bug#70664: 29.3; vtable-insert-object cannot insert at top of table
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Date: Tue, 30 Apr 2024 11:30:47 +0200
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The current implementation of `vtable.el` provides the function
`vtable-insert-object` to add an object to the vtable. Its signature is this:

    vtable-insert-object table object &optional after-object

The doc string says that if AFTER-OBJECT is not provided, the new object is
added to the end of the table. This makes it impossible to add an object as the
first element of the table.

Note that although this e-mail is written from Emacs 29.3, the version of
`vtable.el` in master has the same problem.

[All the diagnostic info that `M-x report-emacs-bug` usually gathers should
appear here, but there was a problem with the buffer being read-only. I'll have
to look into that, but for this report, this info isn't relevant, I think.]

TIA

-- 
Joost Kremers
Life has its moments

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To: Joost Kremers <joostkremers@HIDDEN>
Subject: bug#70664: Acknowledgement (29.3; vtable-insert-object cannot
 insert at top of table)
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#70664: 29.3; vtable-insert-object cannot insert at top of table
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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To: Joost Kremers <joostkremers@HIDDEN>, Adam Porter <adam@HIDDEN>
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Date: Tue, 30 Apr 2024 15:18:48 +0300
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From: Eli Zaretskii <eliz@HIDDEN>
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 (message from Joost Kremers on Tue, 30 Apr 2024 11:30:47 +0200)
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> From: Joost Kremers <joostkremers@HIDDEN>
> Date: Tue, 30 Apr 2024 11:30:47 +0200
> 
> The current implementation of `vtable.el` provides the function
> `vtable-insert-object` to add an object to the vtable. Its signature is this:
> 
>     vtable-insert-object table object &optional after-object
> 
> The doc string says that if AFTER-OBJECT is not provided, the new object is
> added to the end of the table. This makes it impossible to add an object as the
> first element of the table.
> 
> Note that although this e-mail is written from Emacs 29.3, the version of
> `vtable.el` in master has the same problem.

Adam, WDYT?  You did something similar with vtable-update-object,
AFAIR.

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#70664: 29.3; vtable-insert-object cannot insert at top of table
Resent-From: Joost Kremers <joostkremers@HIDDEN>
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To: Adam Porter <adam@HIDDEN>
Cc: Eli Zaretskii <eliz@HIDDEN>, 70664 <at> debbugs.gnu.org
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From: Joost Kremers <joostkremers@HIDDEN>
In-Reply-To: <d55f9a57-c9aa-439e-b8e1-004f445f1a24@HIDDEN> (Adam
 Porter's message of "Tue, 30 Apr 2024 18:27:26 -0500")
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Date: Thu, 02 May 2024 08:52:08 +0200
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Hi Adam,

On Tue, Apr 30 2024, Adam Porter wrote:
> Hm, yes, it seems that it's not possible with the current implementation.
>
> My first idea, requiring maybe the smallest change to the code and no change to
> the signature, would be to accept a special value as the AFTER-OBJECT argument
> to indicate that it should be inserted as the first element, e.g.
> `:insert-first'.

My initial thought as well.

> Alternatively, an additional BEFORE-OBJECT argument could be added, which would
> probably require more changes to the code.

I thought about this and a few other options that came to mind, but I don't
think there's any option that's worth the additional effort to implement it.


-- 
Joost Kremers
Life has its moments

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