qapi: Clean up member name case checking

QAPISchemaMember.check_clash() checks for member names that map to the
same c_name().  Takes care of rejecting duplicate names.

It also checks a naming rule: no uppercase in member names.  That's a
rather odd place to do it.  Enforcing naming rules is
check_name_str()'s job.

qapi-code-gen.txt specifies the name case rule applies to the name as
it appears in the schema.  check_clash() checks c_name(name) instead.
No difference, as c_name() leaves alone case, but unclean.

Move the name case check into check_name_str(), less the c_name().
New argument @permit_upper suppresses it.  Pass permit_upper=True for
definitions (which are not members), and when the member's owner is
whitelisted with pragma name-case-whitelist.

Bonus: name-case-whitelist now applies to a union's inline base, too.
Update qapi/qapi-schema.json pragma to whitelist union CpuInfo instead
of CpuInfo's implicit base type's name q_obj_CpuInfo-base.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190927134639.4284-6-armbru@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/qapi-schema/union-branch-case.json b/tests/qapi-schema/union-branch-case.json
index e6565dc3b3..b7894b75d6 100644
--- a/tests/qapi-schema/union-branch-case.json
+++ b/tests/qapi-schema/union-branch-case.json
@@ -1,2 +1,2 @@
-# Branch names should be 'lower-case' unless the union is whitelisted
-{ 'union': 'NoWayThisWillGetWhitelisted', 'data': { 'Branch': 'int' } }
+# Branch names should be 'lower-case'
+{ 'union': 'Uni', 'data': { 'Branch': 'int' } }