From 7faefad184201b10c2db4270b2bb93e2a5e9552b Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 24 Oct 2019 13:02:28 +0200 Subject: [PATCH] qapi: Clean up doc comment checking for implicit union base An object type's doc comment describes the type's members, less the ones defined in a named base type. Cases: * Struct: the members are defined in 'data' and inherited from 'base'. Since the base type cannot be implicit, the doc comment describes just 'data'. * Simple union: the only member is the implicit tag member @type, and the doc comment describes it. * Flat union with implicit base type: the members are defined in 'base', and the doc comment describes it. * Flat union with named base type: the members are inherited from 'base'. The doc comment describes no members. Before we can check a doc comment with .check_doc(), we need .connect_doc() connect each of its "argument sections" to the member it documents. For structs and simple unions, this is straightforward: the members in question are in .local_members, and .connect_doc() connects them. For flat unions with a named base type, it's trivial: .local_members is empty, and .connect_doc() does nothing. For flat unions with an implicit base type, it's tricky. We have QAPISchema._make_implicit_object_type() forward the union's doc comment to the implicit base type, so that the base type's .connect_doc() connects the members. The union's .connect_doc() does nothing, as .local_members is empty. Dirt effect: we check the doc comment twice, once for the union type, and once for the implicit base type. This is needlessly brittle and hard to understand. Clean up as follows. Make the union's .connect_doc() connect an implicit base's members itself. Do not forward the union's doc comment to its implicit base type. Requires extending .connect_doc() so it can work with a doc comment other than self.doc. Add an optional argument for that. Signed-off-by: Markus Armbruster Message-Id: <20191024110237.30963-11-armbru@redhat.com> --- scripts/qapi/schema.py | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py index 0381e3cb40..c16dce1fe0 100644 --- a/scripts/qapi/schema.py +++ b/scripts/qapi/schema.py @@ -51,7 +51,7 @@ class QAPISchemaEntity(object): os.path.dirname(schema.fname)) self._checked = True - def connect_doc(self): + def connect_doc(self, doc=None): pass def check_doc(self): @@ -224,10 +224,11 @@ class QAPISchemaEnumType(QAPISchemaType): for m in self.members: m.check_clash(self.info, seen) - def connect_doc(self): - if self.doc: + def connect_doc(self, doc=None): + doc = doc or self.doc + if doc: for m in self.members: - self.doc.connect_member(m) + doc.connect_member(m) def check_doc(self): if self.doc: @@ -380,10 +381,13 @@ class QAPISchemaObjectType(QAPISchemaType): for m in self.members: m.check_clash(info, seen) - def connect_doc(self): - if self.doc: + def connect_doc(self, doc=None): + doc = doc or self.doc + if doc: + if self.base and self.base.is_implicit(): + self.base.connect_doc(doc) for m in self.local_members: - self.doc.connect_member(m) + doc.connect_member(m) def check_doc(self): if self.doc: @@ -657,10 +661,11 @@ class QAPISchemaAlternateType(QAPISchemaType): % (v.describe(self.info), types_seen[qt])) types_seen[qt] = v.name - def connect_doc(self): - if self.doc: + def connect_doc(self, doc=None): + doc = doc or self.doc + if doc: for v in self.variants.variants: - self.doc.connect_member(v) + doc.connect_member(v) def check_doc(self): if self.doc: @@ -974,7 +979,7 @@ class QAPISchema(object): tag_member = None if isinstance(base, dict): base = self._make_implicit_object_type( - name, info, doc, ifcond, + name, info, None, ifcond, 'base', self._make_members(base, info)) if tag_name: variants = [self._make_variant(key, value['type'],