GNU bug report logs - #56641
Deprecate `lsh`

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Message #8 received at 56641 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: 56641 <at> debbugs.gnu.org
Subject: Re: bug#56641: Deprecate `lsh`
Date: Tue, 19 Jul 2022 16:52:03 +0300

> From: Mattias Engdegård <mattiase <at> acm.org>
> Date: Tue, 19 Jul 2022 15:38:29 +0200
> 
> The function `lsh` works almost like `ash` but is much slower, cannot be constant-folded by the compiler, and above all has confusing semantics for historical reasons. Using `lsh` instead of `ash` is always a mistake.
> 
> For these reasons we should deprecate `lsh`. It is not important to remove it as soon as possible, but to dissuade people from accidentally using it in their code.

The ELisp manual already says that ash is a better alternative, but
lsh has its niche, and I see no reason to deprecate it more than the
manual already does.

So, no, please let's not.

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