GNU bug report logs - #40584
R7RS string-for-each does not work two or more strings on its argument

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: OKUMURA Yuki <mjt <at> cltn.org>
To: bug-guile <at> gnu.org
Subject: R7RS string-for-each does not work two or more strings on its argument
Date: Mon, 13 Apr 2020 04:38:58 +0900

Hi,

Actually it's my own bug but let me report here: (scheme base) lacks
implementation for string-for-each thus following code does not work;

(import (scheme base))

(string-for-each
  (lambda (e f) 'ok)
  "01234"
  "slas")

Please note that we already have incompatible string-for-each for
SRFI-13 and R6RS.
(It seems current (scheme base) uses SRFI-13 one)
R7RS for-each (and map) procedures allow different length of
collection as arguments.

Checked on 2b4e45ca1b89a942200b7b9f46060dddc44d2876

Message #8 received at 40584 <at> debbugs.gnu.org (full text, mbox):

From: Mark H Weaver <mhw <at> netris.org>
To: OKUMURA Yuki <mjt <at> cltn.org>
Cc: 40584 <at> debbugs.gnu.org
Subject: Re: bug#40584: R7RS string-for-each does not work two or more strings
 on its argument
Date: Fri, 17 Apr 2020 17:07:14 -0400

OKUMURA Yuki <mjt <at> cltn.org> wrote:
> Actually it's my own bug but let me report here: (scheme base) lacks
> implementation for string-for-each thus following code does not work;
> 
> (import (scheme base))
> 
> (string-for-each
>   (lambda (e f) 'ok)
>   "01234"
>   "slas")
> 
> Please note that we already have incompatible string-for-each for
> SRFI-13 and R6RS.
> (It seems current (scheme base) uses SRFI-13 one)
> R7RS for-each (and map) procedures allow different length of
> collection as arguments.
> 
> Checked on 2b4e45ca1b89a942200b7b9f46060dddc44d2876

For the record, the version of R7RS 'string-for-each' that I implemented
for Guile many years ago, in the 'r7rs-wip' branch of Guile's git
repository (not to be confused with 'wip-r7rs'), does not have this bug:

  https://git.savannah.gnu.org/cgit/guile.git/tree/module/scheme/base.scm?h=r7rs-wip&id=2d76447bda2f3d61c94d80b3b78732648a0a511d#n221

I'm not sure why Andy chose not to use my work.

      Mark

Message #11 received at 40584 <at> debbugs.gnu.org (full text, mbox):

From: Taylan Kammer <taylan.kammer <at> gmail.com>
To: 40584 <at> debbugs.gnu.org
Cc: Mark H Weaver <mhw <at> netris.org>, OKUMURA Yuki <mjt <at> cltn.org>
Subject: R7RS string-for-each does not work two or more strings on its argument
Date: Wed, 12 May 2021 23:03:25 +0200

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

Attached is a simple patch to use Mark's implementation
within the current (scheme base) module.

- Taylan

[0001-Fix-scheme-base-string-for-each.patch (text/plain, attachment)]

Message #18 received at 40584-done <at> debbugs.gnu.org (full text, mbox):

From: lloda <lloda <at> sarc.name>
To: 40584-done <at> debbugs.gnu.org
Subject: ...
Date: Fri, 29 Sep 2023 19:01:14 +0200

Patch applied in 3243d96bb5b9658f08847a7073fe6c0b2ccab6be.

Thanks,

  Daniel

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