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[2001:8b0:bf73:93f7::51bb:e332]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b66124355sm14339245e9.0.2025.08.26.03.58.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Aug 2025 03:58:11 -0700 (PDT) Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.97) (envelope-from ) id 1uqrNR-00000000vfk-3we4; Tue, 26 Aug 2025 10:58:09 +0000 Date: Tue, 26 Aug 2025 10:58:09 +0000 (UTC) From: Joseph Myers To: Robert Seacord cc: sc22wg14@open-std.org Subject: Re: [SC22WG14.33429] New issue #1004: Classification of `scanf` failures In-Reply-To: <20250826004639.915F2356B38@www.open-std.org> Message-ID: <2be61aba-1156-2aad-9d84-806c3258c35a@redhat.com> References: <20250307181829.636C7356854@www.open-std.org> <20250825190136.8E691356B93@www.open-std.org> <20250826004639.915F2356B38@www.open-std.org> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: lIGxvJKxocqhIdozvV9DdPNPG-hto8B6k68lLCltfH8_1756205892 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Sender: owner-sc22wg14@open-std.org Precedence: bulk On Tue, 26 Aug 2025, Robert Seacord wrote: > I would prefer the following, simpler language: > > Failures are classified as input failures due to the occurrence of an > encoding error or the unavailability of input > characters), or as matching failures due to inappropriate input or an > unsupported specific width length modifier. I'd be concerned that this might lose the information that an unsupported specfic width length modifier is a failure condition with defined semantics (rather than being UB like most unsupported formats). -- Joseph S. Myers josmyers@redhat.com