From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CEC2C49ED9 for ; Tue, 10 Sep 2019 16:32:51 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 565B7208E4 for ; Tue, 10 Sep 2019 16:32:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 565B7208E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:42266 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i7j4T-0000wA-Hk for qemu-devel@archiver.kernel.org; Tue, 10 Sep 2019 12:32:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46290) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i7j29-0007wc-Vo for qemu-devel@nongnu.org; Tue, 10 Sep 2019 12:30:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i7j28-00051D-1x for qemu-devel@nongnu.org; Tue, 10 Sep 2019 12:30:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45718) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i7j27-00050I-Py for qemu-devel@nongnu.org; Tue, 10 Sep 2019 12:30:24 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5806CA26674; Tue, 10 Sep 2019 16:30:21 +0000 (UTC) Received: from [10.3.116.234] (ovpn-116-234.phx2.redhat.com [10.3.116.234]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9808F6012C; Tue, 10 Sep 2019 16:30:14 +0000 (UTC) To: Markus Armbruster , qemu-devel@nongnu.org References: <20190910063724.28470-1-armbru@redhat.com> <20190910063724.28470-10-armbru@redhat.com> From: Eric Blake Openpgp: preference=signencrypt Autocrypt: addr=eblake@redhat.com; keydata= xsBNBEvHyWwBCACw7DwsQIh0kAbUXyqhfiKAKOTVu6OiMGffw2w90Ggrp4bdVKmCaEXlrVLU xphBM8mb+wsFkU+pq9YR621WXo9REYVIl0FxKeQo9dyQBZ/XvmUMka4NOmHtFg74nvkpJFCD TUNzmqfcjdKhfFV0d7P/ixKQeZr2WP1xMcjmAQY5YvQ2lUoHP43m8TtpB1LkjyYBCodd+LkV GmCx2Bop1LSblbvbrOm2bKpZdBPjncRNob73eTpIXEutvEaHH72LzpzksfcKM+M18cyRH+nP sAd98xIbVjm3Jm4k4d5oQyE2HwOur+trk2EcxTgdp17QapuWPwMfhaNq3runaX7x34zhABEB AAHNHkVyaWMgQmxha2UgPGVibGFrZUByZWRoYXQuY29tPsLAegQTAQgAJAIbAwULCQgHAwUV CgkICwUWAgMBAAIeAQIXgAUCS8fL9QIZAQAKCRCnoWtKJSdDahBHCACbl/5FGkUqJ89GAjeX RjpAeJtdKhujir0iS4CMSIng7fCiGZ0fNJCpL5RpViSo03Q7l37ss+No+dJI8KtAp6ID+PMz wTJe5Egtv/KGUKSDvOLYJ9WIIbftEObekP+GBpWP2+KbpADsc7EsNd70sYxExD3liwVJYqLc Rw7so1PEIFp+Ni9A1DrBR5NaJBnno2PHzHPTS9nmZVYm/4I32qkLXOcdX0XElO8VPDoVobG6 gELf4v/vIImdmxLh/w5WctUpBhWWIfQDvSOW2VZDOihm7pzhQodr3QP/GDLfpK6wI7exeu3P pfPtqwa06s1pae3ad13mZGzkBdNKs1HEm8x6zsBNBEvHyWwBCADGkMFzFjmmyqAEn5D+Mt4P zPdO8NatsDw8Qit3Rmzu+kUygxyYbz52ZO40WUu7EgQ5kDTOeRPnTOd7awWDQcl1gGBXgrkR pAlQ0l0ReO57Q0eglFydLMi5bkwYhfY+TwDPMh3aOP5qBXkm4qIYSsxb8A+i00P72AqFb9Q7 3weG/flxSPApLYQE5qWGSXjOkXJv42NGS6o6gd4RmD6Ap5e8ACo1lSMPfTpGzXlt4aRkBfvb NCfNsQikLZzFYDLbQgKBA33BDeV6vNJ9Cj0SgEGOkYyed4I6AbU0kIy1hHAm1r6+sAnEdIKj cHi3xWH/UPrZW5flM8Kqo14OTDkI9EtlABEBAAHCwF8EGAEIAAkFAkvHyWwCGwwACgkQp6Fr SiUnQ2q03wgAmRFGDeXzc58NX0NrDijUu0zx3Lns/qZ9VrkSWbNZBFjpWKaeL1fdVeE4TDGm I5mRRIsStjQzc2R9b+2VBUhlAqY1nAiBDv0Qnt+9cLiuEICeUwlyl42YdwpmY0ELcy5+u6wz mK/jxrYOpzXKDwLq5k4X+hmGuSNWWAN3gHiJqmJZPkhFPUIozZUCeEc76pS/IUN72NfprZmF Dp6/QDjDFtfS39bHSWXKVZUbqaMPqlj/z6Ugk027/3GUjHHr8WkeL1ezWepYDY7WSoXwfoAL 2UXYsMAr/uUncSKlfjvArhsej0S4zbqim2ZY6S8aRWw94J3bSvJR+Nwbs34GPTD4Pg== Organization: Red Hat, Inc. Message-ID: <24172d8b-7504-2641-d15b-277235430c6e@redhat.com> Date: Tue, 10 Sep 2019 11:30:14 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190910063724.28470-10-armbru@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="myTg0Vbo91YyAPqoIrOsj9hquUdQxlfNt" X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.68]); Tue, 10 Sep 2019 16:30:21 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH v2 09/16] qapi: Permit alternates with just one branch X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marcandre.lureau@redhat.com, mdroth@linux.vnet.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --myTg0Vbo91YyAPqoIrOsj9hquUdQxlfNt Content-Type: multipart/mixed; boundary="SMEO7CXPlL1Lcpqd4ObMH2im1FQZkepJY"; protected-headers="v1" From: Eric Blake To: Markus Armbruster , qemu-devel@nongnu.org Cc: mdroth@linux.vnet.ibm.com, marcandre.lureau@redhat.com Message-ID: <24172d8b-7504-2641-d15b-277235430c6e@redhat.com> Subject: Re: [PATCH v2 09/16] qapi: Permit alternates with just one branch References: <20190910063724.28470-1-armbru@redhat.com> <20190910063724.28470-10-armbru@redhat.com> In-Reply-To: <20190910063724.28470-10-armbru@redhat.com> --SMEO7CXPlL1Lcpqd4ObMH2im1FQZkepJY Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 9/10/19 1:37 AM, Markus Armbruster wrote: > A union or alternate without branches makes no sense and doesn't work: > it can't be instantiated. A union or alternate with just one branch > works, but is degenerate. We accept the former, but reject the > latter. Weird. docs/devel/qapi-code-gen.txt doesn't mention the > difference. It claims an alternate definition is "is similar to a > simple union type". >=20 > Permit degenerate alternates to make them consistent with unions. >=20 > Signed-off-by: Markus Armbruster > --- > scripts/qapi/common.py | 6 ++---- > tests/qapi-schema/alternate-empty.err | 2 +- > tests/qapi-schema/alternate-empty.json | 4 ++-- > tests/qapi-schema/qapi-schema-test.json | 4 +++- > tests/qapi-schema/qapi-schema-test.out | 6 ++++-- > 5 files changed, 12 insertions(+), 10 deletions(-) Reviewed-by: Eric Blake (Might make sense if one of the branches is conditional, where depending on compile-time options it could be a two-branch or a one-branch alternat= e) --=20 Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org --SMEO7CXPlL1Lcpqd4ObMH2im1FQZkepJY-- --myTg0Vbo91YyAPqoIrOsj9hquUdQxlfNt Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEccLMIrHEYCkn0vOqp6FrSiUnQ2oFAl13z5YACgkQp6FrSiUn Q2qqegf/YqXUuJCoQkE2FlPCfujCYLOTzl7FmpdiTeSscAc9qavTEDYgPj0cbqtg smktdtGYfAHEslBM6Y1h/N+8m3CiDdqK2Yn7ivUKXC0hJ/PyJrG+315jBzhciI6R lhw2nfZATdbMJqwKeB0r3+uTeHbpWVBzn6bxnXuj0o4cdqtki+oiO2BU5mfD9969 TOg6doOv5Gza8YbNk6BiVyTyOniTuFP/I/ovsxAbi+19Z/q1xpCAbnzhVU7YcwJ3 VVD48A22YkU5HOrBcKYuSQ/QVQDJNgqGyYc1lVzStF9cODcvH7ikzjV4gU2/5T15 I9V2h7i81e/WdPIaacIjkz+uzy+How== =deyT -----END PGP SIGNATURE----- --myTg0Vbo91YyAPqoIrOsj9hquUdQxlfNt--