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bh=oK5TLvGHeEz6GjH3xnyCpoO4sbbIXKIwxy0cQYHdnKU=; b=dlazBobFX5fhJ1/b2hDjl3r7HQON6JUgVDe2mNb5vzWH21p6B9oEM1w3lidjjxoASueq6V OmPfJbq8DDDhTTytzvtqrVaU/PCQGifPgN/zKD2z8CSoKgb65F8MUhxa/LOs+aaTmtU91H +RY7eYQGn8Xj9sGQqiPovIovNtRJDaU= X-MC-Unique: D7I6cy5ZNd-imEiGH6G__g-1 From: John Snow To: qemu-devel@nongnu.org Cc: Peter Maydell , Michael Roth , Markus Armbruster , John Snow Subject: [PATCH 10/19] qapi/schema: make QAPISchemaArrayType.element_type non-Optional Date: Wed, 15 Nov 2023 20:43:41 -0500 Message-ID: <20231116014350.653792-11-jsnow@redhat.com> In-Reply-To: <20231116014350.653792-1-jsnow@redhat.com> References: <20231116014350.653792-1-jsnow@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 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=170.10.129.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.099, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1700099177578100003 Content-Type: text/plain; charset="utf-8" This field should always be present and defined. Change this to be a runtime @property that can emit an error if it's called prior to check(). This helps simplify typing by avoiding the need to interrogate the value for None at multiple callsites. RFC: Yes, this is a slightly different technique than the one I used for QAPISchemaObjectTypeMember.type; I think I prefer this one as being a little less hokey, but it is more SLOC. Dealer's choice for which style wins out -- now you have an example of both. Signed-off-by: John Snow --- scripts/qapi/schema.py | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py index c9a194103e1..462acb2bb61 100644 --- a/scripts/qapi/schema.py +++ b/scripts/qapi/schema.py @@ -366,7 +366,16 @@ def __init__(self, name, info, element_type): super().__init__(name, info, None) assert isinstance(element_type, str) self._element_type_name =3D element_type - self.element_type =3D None + self._element_type: Optional[QAPISchemaType] =3D None + + @property + def element_type(self) -> QAPISchemaType: + if self._element_type is None: + raise RuntimeError( + "QAPISchemaArray has no element_type until " + "after check() has been run." + ) + return self._element_type =20 def need_has_if_optional(self): # When FOO is an array, we still need has_FOO to distinguish @@ -375,7 +384,7 @@ def need_has_if_optional(self): =20 def check(self, schema): super().check(schema) - self.element_type =3D schema.resolve_type( + self._element_type =3D schema.resolve_type( self._element_type_name, self.info, self.info and self.info.defn_meta) assert not isinstance(self.element_type, QAPISchemaArrayType) --=20 2.41.0