Added missing functions.

tests/test_cpp.cc

@@ -893,6 +893,26 @@ void TestHandlerDataDestruction() {
   ASSERT(x == 0);
 }
 
+void TestIteration() {
+  upb::SymbolTable symtab;
+  upb::MessageDefPtr md(upb_test_TestMessage_getmsgdef(symtab.ptr()));
+
+  // Test range-based for on both fields and oneofs (with the iterator adaptor).
+  int field_count = 0;
+  for (auto field : md.fields()) {
+    UPB_UNUSED(field);
+    field_count++;
+  }
+  ASSERT(field_count == md.field_count());
+
+  int oneof_count = 0;
+  for (auto oneof : md.oneofs()) {
+    UPB_UNUSED(oneof);
+    oneof_count++;
+  }
+  ASSERT(oneof_count == md.oneof_count());
+}
+
 extern "C" {
 
 int run_tests(int argc, char *argv[]) {

upb/def.c

@@ -745,6 +745,11 @@ void upb_msg_field_iter_setdone(upb_msg_field_iter *iter) {
   upb_inttable_iter_setdone(iter);
 }
 
+bool upb_msg_field_iter_isequal(const upb_msg_field_iter * iter1,
+                                const upb_msg_field_iter * iter2) {
+  return upb_inttable_iter_isequal(iter1, iter2);
+}
+
 void upb_msg_oneof_begin(upb_msg_oneof_iter *iter, const upb_msgdef *m) {
   upb_strtable_begin(iter, &m->ntof);
   /* We need to skip past any initial fields. */
@@ -774,6 +779,11 @@ void upb_msg_oneof_iter_setdone(upb_msg_oneof_iter *iter) {
   upb_strtable_iter_setdone(iter);
 }
 
+bool upb_msg_oneof_iter_isequal(const upb_msg_oneof_iter *iter1,
+                                const upb_msg_oneof_iter *iter2) {
+  return upb_strtable_iter_isequal(iter1, iter2);
+}
+
 /* upb_oneofdef ***************************************************************/
 
 const char *upb_oneofdef_name(const upb_oneofdef *o) {