[PATCH v3 06/16] qapi/expr.py: Check type of 'data' member

[John Snow]

Iterating over the members of data isn't going to work if it's not some
form of dict anyway, but for the sake of mypy, formalize it.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qapi/expr.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/qapi/expr.py b/scripts/qapi/expr.py
index c97e8ce8a4d..afa6bd07769 100644
--- a/scripts/qapi/expr.py
+++ b/scripts/qapi/expr.py
@@ -254,6 +254,9 @@ def check_union(expr, info):
             raise QAPISemError(info, "'discriminator' requires 'base'")
         check_name_is_str(discriminator, info, "'discriminator'")
 
+    if not isinstance(members, dict):
+        raise QAPISemError(info, "'data' must be an object")
+
     for (key, value) in members.items():
         source = "'data' member '%s'" % key
         check_name_str(key, info, source)
@@ -267,6 +270,10 @@ def check_alternate(expr, info):
 
     if not members:
         raise QAPISemError(info, "'data' must not be empty")
+
+    if not isinstance(members, dict):
+        raise QAPISemError(info, "'data' must be an object")
+
     for (key, value) in members.items():
         source = "'data' member '%s'" % key
         check_name_str(key, info, source)
-- 
2.29.2