From nobody Mon Feb 9 16:19:00 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1561398184; cv=none; d=zoho.com; s=zohoarc; b=dJYYy3MgceMu+YSW1aYKLax08VeDM/TdW0p5Htp/hjwljzsQxlx7+VpEoyIX/b93T4bD6kJYoHE2al90a6/UQyuVuhF/bfG3VQs4OnyrSflZRiasKFtTAQGu1AGg9XxmKqJb63+8Z/tCxoLETNeJQ3UQHdB0oMUNMS0yK8xEOv8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1561398184; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=3jqLrUwZBCmkq7WnTAvHajYoNJoNeyyFdZfrSpjMS/4=; b=KNKPs/He5T0dp/lknBIm3DAYfXdyWywldt5ctaub29qy9ZkcuoHyflP7zJ39Bfqe5xD6jnJxsANsNMEpnhftuMEW5BCm1VjEPCXOGqMydGXgJpRyhIwSQT5biODMgJr3B7rexu95R5RbMFWfmUdnH9/IAFwlwcNdTTy8DAKy1c4= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1561398184842544.1194435811931; Mon, 24 Jun 2019 10:43:04 -0700 (PDT) Received: from localhost ([::1]:53462 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hfSzc-0003Wv-LT for importer@patchew.org; Mon, 24 Jun 2019 13:43:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48810) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hfSwl-0001As-F6 for qemu-devel@nongnu.org; Mon, 24 Jun 2019 13:40:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hfSwj-0004sG-6z for qemu-devel@nongnu.org; Mon, 24 Jun 2019 13:40:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34424) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hfSwZ-0004LB-Uq; Mon, 24 Jun 2019 13:39:52 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 82D823082E63; Mon, 24 Jun 2019 17:39:47 +0000 (UTC) Received: from localhost (ovpn-204-152.brq.redhat.com [10.40.204.152]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 193415D71A; Mon, 24 Jun 2019 17:39:46 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Mon, 24 Jun 2019 19:39:24 +0200 Message-Id: <20190624173935.25747-5-mreitz@redhat.com> In-Reply-To: <20190624173935.25747-1-mreitz@redhat.com> References: <20190624173935.25747-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Mon, 24 Jun 2019 17:39:47 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v4 04/14] qapi: Allow optional discriminators 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: Kevin Wolf , qemu-devel@nongnu.org, Michael Roth , Markus Armbruster , Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Optional discriminators are fine, as long as there is a default value. Signed-off-by: Max Reitz --- scripts/qapi/common.py | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py index 8c57d0c67a..203623795b 100644 --- a/scripts/qapi/common.py +++ b/scripts/qapi/common.py @@ -1052,11 +1052,21 @@ def check_union(expr, info): base_members =3D find_base_members(base) assert base_members is not None =20 - # The value of member 'discriminator' must name a non-optional - # member of the base struct. + # The value of member 'discriminator' must name a member of + # the base struct. (Optional members are allowed, but the + # discriminator name must not start with '*', so keep + # allow_optional=3DFalse.) check_name(info, "Discriminator of flat union '%s'" % name, discriminator) + discriminator_value =3D base_members.get(discriminator) + if not discriminator_value: + discriminator_value =3D base_members.get('*' + discriminator) + if discriminator_value and 'default' not in discriminator_valu= e: + raise QAPISemError(info, + "Optional discriminator '%s' has no default value" % + discriminator) + if not discriminator_value: raise QAPISemError(info, "Discriminator '%s' is not a member of base= " --=20 2.21.0