From: Yuan Fu <casouri@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel <emacs-devel@gnu.org>
Subject: Re: Distinguish between regional undo and undo to the beginning in undo-equiv-table
Date: Sat, 6 Mar 2021 12:28:53 -0500 [thread overview]
Message-ID: <20C721E0-BC98-4D82-BD73-BA8BD6398058@gmail.com> (raw)
In-Reply-To: <jwv7dmlfvfc.fsf-monnier+emacs@gnu.org>
> On Mar 5, 2021, at 10:57 AM, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>
>>>> Then should we add a mapping for the buffer-undo-list to t at that
>>>> point? Or should we just do nothing?
>>> Good question. I think you have a better understanding of how the equiv
>>> table should be filled than I do at this point, so I'd trust your judgment.
>> Ok, I looked into it in detail, undo-equiv-table is also used to check if
>> the previous command is really an undo, alongside with checking
>> last-command.
>
> Indeed [ tho, this test is not 100% reliable, because the hash-table is
> weak, so entries may disappear from it, leading to entries that used to
> map to non-nil suddenly mapping to nil. ]
I think that’s fine. If the entry disappeared, that means either the key or the value is no longer in the undo list, no?
Yuan
next prev parent reply other threads:[~2021-03-06 17:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 20:40 Distinguish between regional undo and undo to the beginning in undo-equiv-table Yuan Fu
2021-03-02 23:50 ` Stefan Monnier
2021-03-03 15:42 ` Yuan Fu
2021-03-03 16:50 ` Stefan Monnier
2021-03-03 20:33 ` Yuan Fu
2021-03-03 21:29 ` Stefan Monnier
2021-03-03 21:59 ` Yuan Fu
2021-03-03 22:08 ` Yuan Fu
2021-03-03 22:28 ` Stefan Monnier
2021-03-04 16:18 ` Yuan Fu
2021-03-05 15:57 ` Stefan Monnier
2021-03-06 17:28 ` Yuan Fu [this message]
2021-03-06 18:40 ` Stefan Monnier
2021-03-11 17:50 ` Yuan Fu
2021-03-11 17:54 ` Stefan Monnier
2021-03-11 21:23 ` Yuan Fu
2021-03-11 22:41 ` Stefan Monnier
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