[Qemu-devel] [PATCH v6 02/12] qapi: Don't use info as witness of implicit object type

[Eric Blake <eblake@redhat.com>]

A future patch will enable error reporting from the various
QAPISchema*.check() methods.  But to report an error related
to an implicit type, we'll need to associate a location with
the type (the same location as the top-level entity that is
causing the creation of the implicit type), and once we do
that, keying off of whether foo.info exists is no longer a
viable way to determine if foo is an implicit type.

Instead, add an is_implicit() method to QAPISchemaObjectType,
and use that function where needed.  (Done at the ObjectType
level, since we already know all builtins and arrays are
implicit, no commands or events are implicit, and we don't
have any differences in generated code for regular vs.
implicit enums.)

Signed-off-by: Eric Blake <eblake@redhat.com>

---
v6: split 11/46 into pieces; don't rename _info yet; rework atop
nicer filtering mechanism, including no need to change visitor
signature
---
 scripts/qapi-types.py |  3 ++-
 scripts/qapi-visit.py |  3 ++-
 scripts/qapi.py       | 10 +++++++---
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py
index c5b71b0..6bac5b3 100644
--- a/scripts/qapi-types.py
+++ b/scripts/qapi-types.py
@@ -234,7 +234,8 @@ class QAPISchemaGenTypeVisitor(QAPISchemaVisitor):
         self._btin = None

     def visit_predicate(self, entity):
-        return not isinstance(entity, QAPISchemaObjectType) or entity.info
+        return not (isinstance(entity, QAPISchemaObjectType) and
+                    entity.is_implicit())

     def _gen_type_cleanup(self, name):
         self.decl += gen_type_cleanup_decl(name)
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index 0f47614..2957c85 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -334,7 +334,8 @@ class QAPISchemaGenVisitVisitor(QAPISchemaVisitor):
         self._btin = None

     def visit_predicate(self, entity):
-        return not isinstance(entity, QAPISchemaObjectType) or entity.info
+        return not (isinstance(entity, QAPISchemaObjectType) and
+                    entity.is_implicit())

     def visit_enum_type(self, name, info, values, prefix):
         self.decl += gen_visit_decl(name, scalar=True)
diff --git a/scripts/qapi.py b/scripts/qapi.py
index 7d359c8..8123ab3 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -970,12 +970,15 @@ class QAPISchemaObjectType(QAPISchemaType):
             self.variants.check(schema, members, seen)
         self.members = members

+    def is_implicit(self):
+        return self.name[0] == ':'
+
     def c_name(self):
-        assert self.info
+        assert not self.is_implicit()
         return QAPISchemaType.c_name(self)

     def c_type(self, is_param=False):
-        assert self.info
+        assert not self.is_implicit()
         return QAPISchemaType.c_type(self)

     def json_type(self):
@@ -1043,7 +1046,8 @@ class QAPISchemaObjectTypeVariant(QAPISchemaObjectTypeMember):
     # This function exists to support ugly simple union special cases
     # TODO get rid of them, and drop the function
     def simple_union_type(self):
-        if isinstance(self.type, QAPISchemaObjectType) and not self.type.info:
+        if isinstance(self.type,
+                      QAPISchemaObjectType) and self.type.is_implicit():
             assert len(self.type.members) == 1
             assert not self.type.variants
             return self.type.members[0].type
-- 
2.4.3