GNU bug report logs - #78656
[PATCH] Add new reduction primitives `fold-left' and `fold-right'

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Message #8 received at 78656 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Zach Shaftel <zach <at> shaf.tel>
Cc: 78656 <at> debbugs.gnu.org
Subject: Re: bug#78656: [PATCH] Add new reduction primitives `fold-left' and
 `fold-right'
Date: Sun, 01 Jun 2025 08:47:21 +0300

> Date: Sat, 31 May 2025 22:35:20 -0400
> From:  Zach Shaftel via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> this patch adds left and right sequence reduction functions in C, along
> with tests for them. i don't know if this is the sort of thing the
> maintainers actually would want to merge, but i figured i would just
> submit it and hear your feedback. would also appreciate any stylistic
> feedback, for future patch submissions.

Thanks.

We already have seq-reduce, so fold-left seems to be unneeded?  As to
fold-right, couldn't we just add another function to seq.el?  Or are
there good reasons to have these implemented in C?

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