GNU bug report logs - #68863
Add support for using setf with seq-subseq

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Message #23 received at 68863 <at> debbugs.gnu.org (full text, mbox):

From: Okamsn <okamsn <at> protonmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>, Eli Zaretskii <eliz <at> gnu.org>
Cc: 68863 <at> debbugs.gnu.org, Nicolas Petton <nicolas <at> petton.fr>
Subject: Re: bug#68863: Add support for using setf with seq-subseq
Date: Thu, 18 Apr 2024 02:54:46 +0000

[Message part 1 (text/plain, inline)]

Okamsn wrote:
> Hello,
> 
> After testing it more, I see that what I've written does not work as I
> expected in the case
> 
> (let ((v    (vector (vector 0 1)
>                       (vector 2 3)
>                       (vector 4 5))))
>     (setf (seq-subseq (seq-subseq (elt v 0) 0) 0)
>           [10])
>     v)
> 
> in which I would expect it to replace the first element of the first
> sub-vector with 10. I will take more time to continue working on this.
> 
> Thank you for your patience.
> 
> 

Hello,

I found a way to work with subplaces, like in the example in my previous 
e-mail message. Instead of creating the generic feature `(setf 
seq-subseq)` like what is done for `seq-elt`, I created a generic 
function `seq-replace`, which is used in a new `gv-expander` for 
`seq-subseq`. This way of doing it is like what is done for `substring`, 
which has the behavior that I wanted.

What do you think about this approach?

Thank you.

[v3-0001-Add-seq-replace-and-setf-support-for-seq-subseq.patch (text/x-patch, attachment)]

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