tree 8b0b2ef12caafd0fdea6dd560835cd96f7bf7111
parent 268a1c5eb10832c2e4476d3fe199ea547dabecb7
author Eric Blake <eblake@redhat.com> 1430751910 -0600
committer Markus Armbruster <armbru@redhat.com> 1430843940 +0200

qapi: Segregate anonymous unions into alternates in generator

Special-casing 'discriminator == {}' for handling anonymous unions
is getting awkward; since this particular type is not always a
dictionary on the wire, it is easier to treat it as a completely
different class of type, "alternate", so that if a type is listed
in the union_types array, we know it is not an anonymous union.

This patch just further segregates union handling, to make sure that
anonymous unions are not stored in union_types, and splitting up
check_union() into separate functions.  A future patch will change
the qapi grammar, and having the segregation already in place will
make it easier to deal with the distinct meta-type.

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