From: "Marc Nieper-Wißkirchen" <marc.nieper+gnu@gmail.com>
To: bug-gnulib@gnu.org
Subject: Callbacks in the abstact data types and extra contextual data
Date: Thu, 9 Jul 2020 18:13:02 +0200 [thread overview]
Message-ID: <CAEYrNrSJCQRHiXahOhqx6NO_iP1Ys2NCQQw6nDWS=t9QGTcj-A@mail.gmail.com> (raw)
Hi,
a number of modules (like the hash module or the list module) allow
the user to specify callbacks (e.g. a comparison function).
Unfortunately, these procedures do not take a context parameter, which
can be a problem because C lacks closures.
The original qsort function in stdlib.h has the same problem. Glibs
has remedied the problem by introducing qsort_r.
It would be nice if the modules hash, list, xlist, oset, xoset, ...
are extended in a similar way. We would essentially need new
constructors, say with the '_r' suffix.
Marc
next reply other threads:[~2020-07-09 16:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 16:13 Marc Nieper-Wißkirchen [this message]
2020-07-09 20:16 ` Callbacks in the abstact data types and extra contextual data Bruno Haible
2020-07-09 20:38 ` Marc Nieper-Wißkirchen
2020-07-10 18:37 ` Bruno Haible
2020-07-10 19:32 ` Marc Nieper-Wißkirchen
2020-07-10 20:40 ` Bruno Haible
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://lists.gnu.org/mailman/listinfo/bug-gnulib
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAEYrNrSJCQRHiXahOhqx6NO_iP1Ys2NCQQw6nDWS=t9QGTcj-A@mail.gmail.com' \
--to=marc.nieper+gnu@gmail.com \
--cc=bug-gnulib@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).