GNU bug report logs - #51733
27.1; Detect impossible email addresses better

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 51733 <at> debbugs.gnu.org
Subject: bug#51733: 27.1; Detect impossible email addresses better
Date: Tue, 18 Jan 2022 16:55:14 +0200

> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: 51733 <at> debbugs.gnu.org
> Date: Tue, 18 Jan 2022 12:26:30 +0100
> 
> Next stupid question:
> 
> ---
> It must not contain any stateful bidirectional format characters.
> 
>     That is, no [:bidicontrol:] except for the LRM, RLM, and ALM, since the bidirectional controls could influence the ordering of characters outside the quotes.
> ---
> 
> We don't have the :bidicontrol: regexp class.  Do we have another way to
> classify bidi control characters?  The have class Cf, but so does many
> other non-bidi control characters...

I don't think you need any classification: the offending control
characters are very few, so you could just test for them explicitly.

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