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authorEric Blake <eblake@redhat.com>2016-03-03 09:16:45 -0700
committerMarkus Armbruster <armbru@redhat.com>2016-03-05 10:41:13 +0100
commit4d91e9115cc6700113e772b19d1f39bbcf345977 (patch)
tree52474888aa32ccebdafe2d6c380f4f0f52309553 /docs
parentc81200b01422783cd29796ef4ccc275d05f9ce67 (diff)
qapi-visit: Expose visit_type_FOO_members()
Dan Berrange reported a case where he needs to work with a QCryptoBlockOptions union type using the OptsVisitor, but only visit one of the branches of that type (the discriminator is not visited directly, but learned externally). When things were boxed, it was easy: just visit the variant directly, which took care of both allocating the variant and visiting its members, then store that pointer in the union type. But now that things are unboxed, we need a way to visit the members without allocation, done by exposing visit_type_FOO_members() to the user. Before the patch, we had quite a bit of code associated with object_members_seen to make sure that a declaration of the helper was in scope before any use of the function. But now that the helper is public and declared in the header, the .c file no longer needs to worry about topological sorting (the helper is always in scope), which leads to some nice cleanups. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1457021813-10704-4-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
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