From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS22989 209.51.188.0/24 X-Spam-Status: No, score=-3.7 required=3.0 tests=AWL,BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id A91191F463 for ; Sun, 15 Dec 2019 00:36:11 +0000 (UTC) Received: from localhost ([::1]:34948 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1igHtK-0001qR-06 for normalperson@yhbt.net; Sat, 14 Dec 2019 19:36:10 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:35766) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1igHtF-0001pN-F6 for bug-gnulib@gnu.org; Sat, 14 Dec 2019 19:36:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1igHtE-0005vc-Ec for bug-gnulib@gnu.org; Sat, 14 Dec 2019 19:36:05 -0500 Received: from mo6-p00-ob.smtp.rzone.de ([2a01:238:20a:202:5300::2]:32687) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1igHtD-0005iu-OE for bug-gnulib@gnu.org; Sat, 14 Dec 2019 19:36:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1576370160; s=strato-dkim-0002; d=clisp.org; h=References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=Ukw/haCiapG3w8XDSjYSbYq9azK3Yok8Hr/JF4+jX8g=; b=D4HYXJR59JNmjzb9LBwufR7Rl0Mwc9Yo91+obriWmpPct7P+sK3pCsbTB5+6pbwP5X ZrS2NE4EsdMu56Sp9sOLqTB2bX4q6n25MpW4ssAC972uI72SkxP4pdnW4HY9d+DwoyUx Y5xTgGSFVm+eOi8s5kILUtRTIgOFrg3r+nPqWdlEToDQQ4Cgk5a11gT/Esf1i56xIYYf H+ovJijNswMV5Yxx6dDEbbAmJnmNzSz5GiG535ze3M1DY0P2WFOelX5ZW7uGVGi5V86o fs1Bze3W+E5uh0OG/ZlBtWI9OT72VVDCey6rGyK/9KwjH5x3xgAJejsYlpz5IHzIyYNP Otww== X-RZG-AUTH: ":Ln4Re0+Ic/6oZXR1YgKryK8brlshOcZlIWs+iCP5vnk6shH+AHjwLuWOH6fzxfs=" X-RZG-CLASS-ID: mo00 Received: from bruno.haible.de by smtp.strato.de (RZmta 46.0.7 DYNA|AUTH) with ESMTPSA id 3049ecvBF0ZwAuL (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (curve X9_62_prime256v1 with 256 ECDH bits, eq. 3072 bits RSA)) (Client did not present a certificate); Sun, 15 Dec 2019 01:35:58 +0100 (CET) From: Bruno Haible To: Paul Eggert Subject: Re: intptr_t vs. uintptr_t Date: Sun, 15 Dec 2019 01:35:58 +0100 Message-ID: <1794872.dtbK2spBG1@omega> User-Agent: KMail/5.1.3 (Linux/4.4.0-166-generic; KDE/5.18.0; x86_64; ; ) In-Reply-To: <362ef4f4-83b7-1630-9ad3-4453ae2b5e64@cs.ucla.edu> References: <20190323080618.E6EB.27F6AC2D@kcn.ne.jp> <2783436.Tsuh4lOfYa@omega> <362ef4f4-83b7-1630-9ad3-4453ae2b5e64@cs.ucla.edu> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a01:238:20a:202:5300::2 X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bug-gnulib@gnu.org Errors-To: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Sender: "bug-gnulib" Hi Paul, > I installed the attached into the Emacs Lisp reference manual to try to capture > that advice. Thanks. This is better. But the advice can be simplified: If pointer arithmetic is involved, uintptr_t is better suited than intptr_t. And if pointer arithmetic is not involved, uintptr_t and intptr_t are equivalent and equally good. So, a simpler advice would be to always prefer uintptr_t (to represent pointer values). Bruno