From 92a7e778e7394386f413cec28d67a07630f784b1 Mon Sep 17 00:00:00 2001
From: Adam Cozzette <acozzette@google.com>
Date: Fri, 1 Dec 2017 10:05:10 -0800
Subject: Integrated internal changes from Google

---
 src/google/protobuf/generated_message_util.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/google/protobuf/generated_message_util.h')

diff --git a/src/google/protobuf/generated_message_util.h b/src/google/protobuf/generated_message_util.h
index 8ebfc13b..cd74b45e 100644
--- a/src/google/protobuf/generated_message_util.h
+++ b/src/google/protobuf/generated_message_util.h
@@ -47,6 +47,7 @@
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/stubs/once.h>
 #include <google/protobuf/has_bits.h>
+#include <google/protobuf/implicit_weak_message.h>
 #include <google/protobuf/map_entry_lite.h>
 #include <google/protobuf/message_lite.h>
 #include <google/protobuf/wire_format_lite.h>
@@ -120,6 +121,21 @@ template <class Type> bool AllAreInitialized(const Type& t) {
   return true;
 }
 
+// "Weak" variant of AllAreInitialized, used to implement implicit weak fields.
+// This version operates on MessageLite to avoid introducing a dependency on the
+// concrete message type.
+template <class T>
+bool AllAreInitializedWeak(const ::google::protobuf::RepeatedPtrField<T>& t) {
+  for (int i = t.size(); --i >= 0;) {
+    if (!reinterpret_cast<const ::google::protobuf::internal::RepeatedPtrFieldBase&>(t)
+             .Get< ::google::protobuf::internal::ImplicitWeakTypeHandler<T> >(i)
+             .IsInitialized()) {
+      return false;
+    }
+  }
+  return true;
+}
+
 LIBPROTOBUF_EXPORT void InitProtobufDefaults();
 
 struct LIBPROTOBUF_EXPORT FieldMetadata {
-- 
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