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[2001:8b0:bf73:93f7::51bb:e332]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3ee0fbc7107sm5528299f8f.30.2025.09.18.14.19.07 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Sep 2025 14:19:08 -0700 (PDT) Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.97) (envelope-from ) id 1uzM1y-00000000sR7-1bie for sc22wg14@open-std.org; Thu, 18 Sep 2025 21:19:06 +0000 Date: Thu, 18 Sep 2025 21:19:06 +0000 (UTC) From: Joseph Myers To: sc22wg14@open-std.org Subject: Missing newlines at end of file Message-ID: <258e24b2-d924-204f-a958-366dda81a37c@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: FNu57uxjlvSOeGyIhXHIng9C5WZxJETKecxh0SvrCMc_1758230349 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Sender: owner-sc22wg14@open-std.org Precedence: bulk In Graz we accepted N3411, allowing source files without a final newline, and N3478, making partial comments at the end of a file a constraint violation, and it was said that we should have a followup paper to allow a "//" comment at the end of the file without a final newline (though it wasn't clear who would be writing that followup paper). I think we need such a followup to N3411 for other cases as well. Specifically, the syntax for many preprocessing directives includes new-line. This leaves it unclear what the effects should be if the source file ends with a preprocessing directive without the final newline character, but literally it looks like such cases would be syntax violations. I don't think that's what was intended when we accepted N3411 - I think the clear expectation is that it would be as if a newline were always added at the end of the file, so such a preprocessing directive has its usual effect. -- Joseph S. Myers josmyers@redhat.com