qapi/schema: add _check_complete flag
Instead of using the None value for the members field, use a dedicated
flag to detect recursive misconfigurations.
This is intended to assist with subsequent patches that seek to remove
the "None" value from the members field (which can never hold that value
after the final call to check()) in order to simplify the static typing
of that field; avoiding the need of assertions littered at many
callsites to eliminate the possibility of the None value.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240315152301.3621858-16-armbru@redhat.com>
diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py
index 173e27d..2c3de72 100644
--- a/scripts/qapi/schema.py
+++ b/scripts/qapi/schema.py
@@ -450,12 +450,13 @@
self.local_members = local_members
self.variants = variants
self.members = None
+ self._check_complete = False
def check(self, schema):
# This calls another type T's .check() exactly when the C
# struct emitted by gen_object() contains that T's C struct
# (pointers don't count).
- if self.members is not None:
+ if self._check_complete:
# A previous .check() completed: nothing to do
return
if self._checked:
@@ -464,7 +465,7 @@
"object %s contains itself" % self.name)
super().check(schema)
- assert self._checked and self.members is None
+ assert self._checked and not self._check_complete
seen = OrderedDict()
if self._base_name:
@@ -487,7 +488,8 @@
self.variants.check(schema, seen)
self.variants.check_clash(self.info, seen)
- self.members = members # mark completed
+ self.members = members
+ self._check_complete = True # mark completed
# Check that the members of this type do not cause duplicate JSON members,
# and update seen to track the members seen so far. Report any errors
