qapi: Check for member name conflicts with a base class

Our type inheritance for both 'struct' and for flat 'union' merges
key/value pairs from the base class with those from the type in
question.  Although the C code currently boxes things so that there
is a distinction between which member is referred to, the QMP wire
format does not allow passing a key more than once in a single
object.  Besides, if we ever change the generated C code to not be
quite so boxy, we'd want to avoid duplicate member names there,
too.

Fix a testsuite entry added in an earlier patch, as well as adding
a couple more tests to ensure we have appropriate coverage.  Ensure
that collisions are detected, regardless of whether there is a
difference in opinion on whether the member name is optional.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/tests/Makefile b/tests/Makefile
index 547a249..666aee2 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -243,7 +243,8 @@ check-qapi-schema-y := $(addprefix tests/qapi-schema/, \
 	include-simple.json include-relpath.json include-format-err.json \
 	include-non-file.json include-no-file.json include-before-err.json \
 	include-nested-err.json include-self-cycle.json include-cycle.json \
-	include-repetition.json event-nest-struct.json event-case.json)
+	include-repetition.json event-nest-struct.json event-case.json \
+	struct-base-clash.json struct-base-clash-deep.json )
 
 GENERATED_HEADERS += tests/test-qapi-types.h tests/test-qapi-visit.h \
 		     tests/test-qmp-commands.h tests/test-qapi-event.h