Subject: Re: bug#56641: Deprecate `lsh`

From: Eli Zaretskii <[email-masked]>
Date: Tue, 19 Jul 2022 16:52:03 +0300

> From: Mattias Engdegård <[email-masked]>
> 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.