GNU bug report logs - #30039
26.0.90; [26.1] Making my code warning free is impossible with when-let

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From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: Eric Abrahamsen <eric <at> ericabrahamsen.net>
Cc: Damien Cassou <damien <at> cassou.me>, 30039 <at> debbugs.gnu.org, Nicolas Petton <nicolas <at> petton.fr>
Subject: bug#30039: 26.0.90; [26.1] Making my code warning free is impossible with when-let
Date: Wed, 10 Jan 2018 18:06:20 -0500

On Wed, Jan 10, 2018 at 5:57 PM, Eric Abrahamsen
<eric <at> ericabrahamsen.net> wrote:

> Right, and the issue wasn't the introduction of when-let*, it was the
> very short life-cycle of when-let.

I don't understand how that leads to this:

    I have to choose between compiler warnings on the one hand,
    or multiple users running an Emacs without the function, on the other.

Supposing when-let* was only introduced as a replacement to when-let
in Emacs 30, you would still have to choose between users of Emacs 29
reporting errors, or get deprecation warnings when compiling in Emacs
30. The (hypothetical) longer non-deprecated existence of when-let
over versions 26,27,28,29 wouldn't help (unless you plan to stop
developing your package before Emacs 30, I guess).

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