GNU bug report logs - #67220
30.0.50; ERC 5.6: Prefer parameter-driven MODE processing in ERC

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From: "J.P." <jp <at> neverwas.me>
To: 67220 <at> debbugs.gnu.org
Cc: emacs-erc <at> gnu.org
Subject: bug#67220: 30.0.50; ERC 5.6: Prefer parameter-driven MODE processing in ERC
Date: Tue, 20 Feb 2024 17:14:39 -0800

"J.P." <jp <at> neverwas.me> writes:

> It turns out a not entirely frivolous use case for abiding by that RFC
> draft and *not* distinguishing between the two forms has arisen.
> Basically, a server may choose to support no channels whatsoever for a
> subset of clients, limiting them to direct messages only. To accommodate
> this, ERC will need to interpret both "CHANTYPES" and "CHANTYPES=" as
> expressing such a policy instead of sticking with its current behavior
> of only doing so for the "=" form and treating "CHANTYPES" as equivalent
> to ${default/fallback} (and thus also to "-CHANTYPES", which is clearly
> wrong).
>
> I think it's worth correcting this in ERC 5.6. Proposed changes
> attached. (The first patch is unrelated.)

These changes now live on master as

  3d87e343276 * Use modern fallback for channel name detection in ERC
  25d15391f26 * Normalize ISUPPORT params with empty values in ERC

If anyone experiences new difficulties related to detecting channel
names, these are likely to blame.

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