qapi: Fix errors for non-string, non-dictionary members

Fixes the errors demonstrated by the previous commit.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

scripts/qapi.py

@@ -462,13 +462,15 @@ def check_type(expr_info, source, value, allow_array = False,
                                 % (source, all_names[value], orig_value))
         return
 
-    # value is a dictionary, check that each member is okay
-    if not isinstance(value, OrderedDict):
-        raise QAPIExprError(expr_info,
-                            "%s should be a dictionary" % source)
     if not allow_dict:
         raise QAPIExprError(expr_info,
                             "%s should be a type name" % source)
+
+    if not isinstance(value, OrderedDict):
+        raise QAPIExprError(expr_info,
+                            "%s should be a dictionary or type name" % source)
+
+    # value is a dictionary, check that each member is okay
     for (key, arg) in value.items():
         check_name(expr_info, "Member of %s" % source, key,
                    allow_optional=allow_optional)

tests/qapi-schema/args-invalid.err

@@ -1 +1 @@
-tests/qapi-schema/args-invalid.json:2: 'data' for command 'foo' should be a dictionary
+tests/qapi-schema/args-invalid.json:1: 'data' for command 'foo' should be a dictionary or type name

tests/qapi-schema/args-invalid.json

@@ -1,3 +1,2 @@
-# FIXME error "should be a dictionary" is misleading, type name is also fine
 { 'command': 'foo',
   'data': false }

tests/qapi-schema/struct-data-invalid.err

@@ -1 +1 @@
-tests/qapi-schema/struct-data-invalid.json:2: 'data' for struct 'foo' should be a dictionary
+tests/qapi-schema/struct-data-invalid.json:1: 'data' for struct 'foo' should be a dictionary or type name

tests/qapi-schema/struct-data-invalid.json

@@ -1,3 +1,2 @@
-# FIXME error "should be a dictionary" is misleading, type name is also fine
 { 'struct': 'foo',
   'data': false }

tests/qapi-schema/struct-member-invalid.err

@@ -1 +1 @@
-tests/qapi-schema/struct-member-invalid.json:2: Member 'a' of 'data' for struct 'foo' should be a dictionary
+tests/qapi-schema/struct-member-invalid.json:1: Member 'a' of 'data' for struct 'foo' should be a type name

tests/qapi-schema/struct-member-invalid.json

@@ -1,3 +1,2 @@
-# FIXME error message "should be a dictionary" is wrong, must be type name
 { 'struct': 'foo',
   'data': { 'a': false } }