qapi: Drop one of two "simple union must not have base" checks

The first check ensures the second one can't trigger.  Drop the first
one, because the second one is in a more logical place, and emits a
nicer error message.

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

diff --git a/scripts/qapi.py b/scripts/qapi.py
index 23c32fe3ddcf0a12308208b21933f12e1177a27d..197db77a9fd81e8d56d5433eaa9e311a3fbe4900 100644 (file)
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -526,14 +526,6 @@ def check_union(expr, expr_info):
     members = expr['data']
     values = { 'MAX': '(automatic)' }
 
-    # If the object has a member 'base', its value must name a struct,
-    # and there must be a discriminator.
-    if base is not None:
-        if discriminator is None:
-            raise QAPIExprError(expr_info,
-                                "Union '%s' requires a discriminator to go "
-                                "along with base" %name)
-
     # Two types of unions, determined by discriminator.
 
     # With no discriminator it is a simple union.

diff --git a/tests/qapi-schema/union-base-no-discriminator.err b/tests/qapi-schema/union-base-no-discriminator.err
index fc8b79c45965ff50d8988d845a00f80744ad69c4..8b7a24260ffa8d900f3ffa73d3af8f5616803be6 100644 (file)
--- a/tests/qapi-schema/union-base-no-discriminator.err
+++ b/tests/qapi-schema/union-base-no-discriminator.err
@@ -1 +1 @@
-tests/qapi-schema/union-base-no-discriminator.json:11: Union 'TestUnion' requires a discriminator to go along with base
+tests/qapi-schema/union-base-no-discriminator.json:11: Simple union 'TestUnion' must not have a base