From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail
From: Damien Mattei <damien.mattei@gmail.com>
Newsgroups: gmane.lisp.guile.user
Subject: Re: overloading an existing operator in Guile
Date: Tue, 3 Oct 2023 21:01:19 +0200
Message-ID: <CADEOadeW3ansi0uVkfko1nhh6FrS6_LdYO+3uOppCb8w=XiLEQ@mail.gmail.com>
References: <92548a01-6764-cd02-85c7-f0121030e907@telenet.be>
 <6172B821-4A2E-4BC1-B3CE-D3E7F1E404AB@abou-samra.fr>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214";
	logging-data="30273"; mail-complaints-to="usenet@ciao.gmane.io"
Cc: Maxime Devos <maximedevos@telenet.be>, guile-user <guile-user@gnu.org>
To: Jean Abou Samra <jean@abou-samra.fr>
Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Tue Oct 03 21:02:10 2023
Return-path: <guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org>
Envelope-to: guile-user@m.gmane-mx.org
Original-Received: from lists.gnu.org ([209.51.188.17])
	by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org>)
	id 1qnkeo-0007dG-Tp
	for guile-user@m.gmane-mx.org; Tue, 03 Oct 2023 21:02:10 +0200
Original-Received: from localhost ([::1] helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <guile-user-bounces@gnu.org>)
	id 1qnkeG-0005fp-Cy; Tue, 03 Oct 2023 15:01:36 -0400
Original-Received: from eggs.gnu.org ([2001:470:142:3::10])
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <damien.mattei@gmail.com>)
 id 1qnkeF-0005fX-5H
 for guile-user@gnu.org; Tue, 03 Oct 2023 15:01:35 -0400
Original-Received: from mail-ed1-x52b.google.com ([2a00:1450:4864:20::52b])
 by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
 (Exim 4.90_1) (envelope-from <damien.mattei@gmail.com>)
 id 1qnkeD-0000vO-E8
 for guile-user@gnu.org; Tue, 03 Oct 2023 15:01:34 -0400
Original-Received: by mail-ed1-x52b.google.com with SMTP id
 4fb4d7f45d1cf-533f193fc8dso2241489a12.2
 for <guile-user@gnu.org>; Tue, 03 Oct 2023 12:01:33 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=gmail.com; s=20230601; t=1696359691; x=1696964491; darn=gnu.org;
 h=content-transfer-encoding:cc:to:subject:message-id:date:from
 :in-reply-to:references:mime-version:from:to:cc:subject:date
 :message-id:reply-to;
 bh=bQTT3uRb1GDv7aF/v3sjGCVphtmwfOd1VXpbnyBph44=;
 b=RD5z0nwBtQ7nTdcxhIuUrlqvOJjiy7J7Ri5HY8XwIKyeMIBJEl5e52/50hitNZIBpE
 lp1eHoMYT5bmDoI1yhw3C4F+qsUMhXpP0FgROBGxZAUAwIfvEIWGYYJWLgtab0DpTFI4
 QfOaexsM9eGogAnUPn3RdosNFhssBVlr5ne+7N2eOeygOhtHURZ3jV+nj49oJeq0mI2u
 btqA7KJWIA1gHYr0TDxMUi4jVFPiX8QjRMUB18GYzfxWZxktzAqje/A2ssy7/70Y/MBC
 1z278DyosqOTXSpuGdSBdZG+8bG3LMor/f3xGKI8JM9bL03LU5EeHR8BTAXty2yVN62h
 QVzw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20230601; t=1696359691; x=1696964491;
 h=content-transfer-encoding:cc:to:subject:message-id:date:from
 :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc
 :subject:date:message-id:reply-to;
 bh=bQTT3uRb1GDv7aF/v3sjGCVphtmwfOd1VXpbnyBph44=;
 b=tprnLvL9FvUuPkSHCyFBTInWKpJ8HgsZH/0ZbbNLjU1hVndRbrEgQ2GN/xOdAMmayF
 D6ZpgBhNzV59OSIk7SScCZFhRQE+VPlim95xAJil1wNmRVqt2bl/BH/bn+tlrxZlMVpw
 DU7+VNcwioZzu/sjTJ/f/SkpDELHLamPfACmcIKCY0F5nMKcTNjlMRbaG5GIfqJW0jHQ
 9uKlVoSk+/R52somPbAs/gJJgwigFjttgyZKRe8UihayGttlRgvAS2h8+6LlF3eSa6l2
 NdxYD39qOUyYc9w3zD0QgVCBOfaa1rbZBpoUEhfUC07kjDN7m/5jlf8JIxK5zRrqGBLt
 wHSA==
X-Gm-Message-State: AOJu0Yzr4awSrKhCYFDs1hWi4HbrBXPYEGiMd1gtnuQOjl1N9V598M38
 fPjFow6j9ODZdNRssJskiozHJS/9uF8bY8kF8jppgd8k
X-Google-Smtp-Source: AGHT+IEpXSncSGXMRUQNC7bHLY4VJvy7DOWg3BHLxcJeL+w28MhX+bv8xl6gwthLQdnpRGLrZqS0qXMWG0j17y80JV8=
X-Received: by 2002:aa7:d14a:0:b0:533:3cdd:3faf with SMTP id
 r10-20020aa7d14a000000b005333cdd3fafmr67231edo.1.1696359691162; Tue, 03 Oct
 2023 12:01:31 -0700 (PDT)
In-Reply-To: <6172B821-4A2E-4BC1-B3CE-D3E7F1E404AB@abou-samra.fr>
Received-SPF: pass client-ip=2a00:1450:4864:20::52b;
 envelope-from=damien.mattei@gmail.com; helo=mail-ed1-x52b.google.com
X-Spam_score_int: -20
X-Spam_score: -2.1
X-Spam_bar: --
X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,
 DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,
 RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,
 SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-BeenThere: guile-user@gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: General Guile related discussions <guile-user.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/guile-user>,
 <mailto:guile-user-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/guile-user>
List-Post: <mailto:guile-user@gnu.org>
List-Help: <mailto:guile-user-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/guile-user>,
 <mailto:guile-user-request@gnu.org?subject=subscribe>
Errors-To: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org
Original-Sender: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org
Xref: news.gmane.io gmane.lisp.guile.user:19220
Archived-At: <http://permalink.gmane.org/gmane.lisp.guile.user/19220>

i agree with you all but there is a misunderstanding of what i'm
currently doing.

I'm not making + that append vectors a part of Scheme+, it is just for
a personal program that i want to overload it. This will never be in
Scheme+. (even if python use + for appending list, and list in python
are half way from scheme's vectors and scheme's list, perheaps the
confusion is coming from that)

On Tue, Oct 3, 2023 at 8:41=E2=80=AFPM Jean Abou Samra <jean@abou-samra.fr>=
 wrote:
>
>
> > Le 3 oct. 2023 =C3=A0 20:35, Maxime Devos <maximedevos@telenet.be> a =
=C3=A9crit :
> >
> > It's explained in =E2=80=98(guile)Methods and Generic Functions=E2=80=
=99 how to do this.
> >
> > However, I very much recommend not doing this in your situation.
>
> +1. I'd recommend only implementing a method foo on a type bar if you are=
 in control of either foo or bar. (Rust has an analogous concept called "tr=
ait coherence".)
>
>