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bug#7631: 24.0.50; inconsistency in event-convert-list and event-basic-t

From: Stefan Monnier
Subject: bug#7631: 24.0.50; inconsistency in event-convert-list and event-basic-type
Date: Sun, 18 Jul 2021 12:09:43 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

Don March wrote:
> (event-convert-list
>  (append (event-modifiers event)
>         (list (event-basic-type event)))) ; => 116, not t
> In my mind, this should be an identity function (in the mathematical
> sense) for events;

In general, it literally can't be: there are several "equivalent"
representations of a given event and `event-convert-list` should return
a "canonical" version.  E.g. it should return `C-M-return` when `event`
is `M-C-return`.

There is no "canonical event" `t`, instead Emacs uses `?t` as the
canonical event for hitting the key `t`.

Lars wrote:
> So if this isn't a bug (and I think it would be problematic to change
> the return value at this point), the doc string is at least slightly
> misleading here, and shouldn't claim that it returns exactly the same
> base event type.

Fair enough,


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