intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 33 insertions, 0 deletions

diff --git a/library/cpp/protobuf/util/is_equal.h b/library/cpp/protobuf/util/is_equal.h
new file mode 100644
index 00000000000..13c0aae63d9
--- /dev/null
+++ b/library/cpp/protobuf/util/is_equal.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <util/generic/fwd.h>
+
+namespace google {
+    namespace protobuf {
+        class Message;
+        class FieldDescriptor;
+    }
+}
+
+namespace NProtoBuf {
+    using ::google::protobuf::FieldDescriptor;
+    using ::google::protobuf::Message;
+}
+
+namespace NProtoBuf {
+    // Reflection-based equality check for arbitrary protobuf messages
+
+    // Strict comparison: optional field without value is NOT equal to
+    // a field with explicitly set default value.
+    bool IsEqual(const Message& m1, const Message& m2);
+    bool IsEqual(const Message& m1, const Message& m2, TString* differentPath);
+
+    bool IsEqualField(const Message& m1, const Message& m2, const FieldDescriptor& field);
+
+    // Non-strict version: optional field without explicit value is compared
+    // using its default value.
+    bool IsEqualDefault(const Message& m1, const Message& m2);
+
+    bool IsEqualFieldDefault(const Message& m1, const Message& m2, const FieldDescriptor& field);
+
+}