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bh=l+6+4m8ddXfliu1OpJ3bj+fcD6/yd7oR/PRB7u/R/uU=; b=Kn5/rDTtYgoBomrsCC9YRKp0W0G9L2hR5v3Kt9uZx8//ohCXTUUgCShoZLYLN5LBQX7kEi hGNFW7asSUFPee4jHjs58jLS6j0dBKVBrzB6+9lsgBIlM/XmhUzLFwW2OOxUZT5OexFPX/ b6GEJXpAo/h0osk7GeLbUrbmH6eozOY= X-MC-Unique: NGPaGM5KO96izkCSad1cVg-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Subject: [PATCH v4 9/9] docs: update the documentation about schema configuration Date: Mon, 17 May 2021 20:30:40 +0400 Message-Id: <20210517163040.2308926-10-marcandre.lureau@redhat.com> In-Reply-To: <20210517163040.2308926-1-marcandre.lureau@redhat.com> References: <20210517163040.2308926-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=marcandre.lureau@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=216.205.24.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.374, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , jsnow@redhat.com, Markus Armbruster , stefanha@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Marc-Andr=C3=A9 Lureau Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Stefan Hajnoczi Tested-by: John Snow --- docs/devel/qapi-code-gen.txt | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/docs/devel/qapi-code-gen.txt b/docs/devel/qapi-code-gen.txt index edaaf7ec40..4a3fd02723 100644 --- a/docs/devel/qapi-code-gen.txt +++ b/docs/devel/qapi-code-gen.txt @@ -780,26 +780,31 @@ downstream command __com.redhat_drive-mirror. =3D=3D=3D Configuring the schema =3D=3D=3D =20 Syntax: - COND =3D STRING - | [ STRING, ... ] + COND =3D CFG-ID + | [ COND, ... ] + | { 'all: [ COND, ... ] } + | { 'any: [ COND, ... ] } + | { 'not': COND } =20 -All definitions take an optional 'if' member. Its value must be a -string or a list of strings. A string is shorthand for a list -containing just that string. The code generated for the definition -will then be guarded by #if STRING for each STRING in the COND list. + CFG-ID =3D STRING + +All definitions take an optional 'if' member. Its value must be a string, = a list +of strings or an object with a single member 'all', 'any' or 'not'. A stri= ng is +shorthand for a list containing just that string. A list is a shorthand fo= r a +'all'-member object. The C code generated for the definition will then be = guarded +by an #if precessor expression generated from that condition: 'all': [COND= , ...] +will generate '(COND && ...)', 'any': [COND, ...] '(COND || ...)', 'not': = COND '!COND'. =20 Example: a conditional struct =20 { 'struct': 'IfStruct', 'data': { 'foo': 'int' }, - 'if': ['CONFIG_FOO', 'HAVE_BAR'] } + 'if': { 'all': [ 'CONFIG_FOO', 'HAVE_BAR' ] } } =20 gets its generated code guarded like this: =20 - #if defined(CONFIG_FOO) - #if defined(HAVE_BAR) + #if defined(CONFIG_FOO) && defined(HAVE_BAR) ... generated code ... - #endif /* defined(HAVE_BAR) */ - #endif /* defined(CONFIG_FOO) */ + #endif /* defined(HAVE_BAR) && defined(CONFIG_FOO) */ =20 Individual members of complex types, commands arguments, and event-specific data can also be made conditional. This requires the --=20 2.29.0