From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 4241E3856163; Mon, 24 Oct 2022 23:20:48 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4241E3856163 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1666653648; bh=e1qEAgH5kjt8t8ha+G/zO/3hUkpwmQiTK1bVgzAn8Rc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=sQf68ioV6iMBihXHoc3wl1BmT/qe3p/vhNnzsHHisAJQx9VXOqIIdi551uBp0WYC9 62qA8DQgVrurdUKVrMTRoxDSkFo3wXw6T3GDejw/yQ8ai5HAwRpLtAYIyF6H9Szkky WqZ9O8zs+LVArspunQKgr5PXVL89qKwB3Et7Z/p4= From: "mpolacek at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/107388] GCC should diagnose unsigned to signed conversion with -Wconversion Date: Mon, 24 Oct 2022 23:20:48 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 13.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mpolacek at gcc dot gnu.org X-Bugzilla-Status: RESOLVED X-Bugzilla-Resolution: INVALID X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107388 Marek Polacek changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID CC| |mpolacek at gcc dot gnu.org --- Comment #1 from Marek Polacek --- This is -Wsign-conversion: $ ./cc1plus -quiet t.C -Wsign-conversion t.C: In function =E2=80=98void func(unsigned int)=E2=80=99: t.C:2:28: warning: conversion to =E2=80=98int=E2=80=99 from =E2=80=98unsign= ed int=E2=80=99 may change the sign of the result [-Wsign-conversion] 2 | [[maybe_unused]] int v =3D size; // doesn't get diagnosed | ^~~~=