Support oneof defs in upb.

This change adds support for a OneofDef (upb_oneofdef), which represents
a 'oneof' as introduced by Protocol Buffers. This is semantically a
union type that contains fields and in turn may be added to a
MessageDef. This change does not alter parsing or the handler
abstraction in any way, because a oneof has impact only at a higher
semantic level (i.e., any sort of storage of the fields in a message
object), which is user-specific with respect to upb.

1 files changed, 3 insertions, 3 deletions

diff --git a/upb/json/printer.c b/upb/json/printer.c
index b996ccf..3dd3c20 100644
--- a/upb/json/printer.c
+++ b/upb/json/printer.c
@@ -437,9 +437,9 @@ void printer_sethandlers(const void *closure, upb_handlers *h) {
     }                                                              \
     break;
 
-  upb_msg_iter i;
-  upb_msg_begin(&i, upb_handlers_msgdef(h));
-  for(; !upb_msg_done(&i); upb_msg_next(&i)) {
+  upb_msg_field_iter i;
+  upb_msg_field_begin(&i, upb_handlers_msgdef(h));
+  for(; !upb_msg_field_done(&i); upb_msg_field_next(&i)) {
     const upb_fielddef *f = upb_msg_iter_field(&i);
 
     upb_handlerattr name_attr = UPB_HANDLERATTR_INITIALIZER;