Avoid build errors

include/grpcpp/impl/codegen/byte_buffer.h

@@ -96,7 +96,7 @@ class ByteBuffer final {
   /// \a buf. Wrapper of core function grpc_byte_buffer_copy . This is not
   /// a deep copy; it is just a referencing. As a result, its performance is
   /// size-independent.
-  ByteBuffer(const ByteBuffer& buf);
+  ByteBuffer(const ByteBuffer& buf) : buffer_(nullptr) { operator=(buf); }
 
   ~ByteBuffer() {
     if (buffer_) {
@@ -107,7 +107,16 @@ class ByteBuffer final {
   /// Wrapper of core function grpc_byte_buffer_copy . This is not
   /// a deep copy; it is just a referencing. As a result, its performance is
   /// size-independent.
-  ByteBuffer& operator=(const ByteBuffer&);
+  ByteBuffer& operator=(const ByteBuffer& buf) {
+    if (this != &buf) {
+      Clear();  // first remove existing data
+    }
+    if (buf.buffer_) {
+      // then copy
+      buffer_ = g_core_codegen_interface->grpc_byte_buffer_copy(buf.buffer_);
+    }
+    return *this;
+  }
 
   /// Dump (read) the buffer contents into \a slices.
   Status Dump(std::vector<Slice>* slices) const;
@@ -215,7 +224,7 @@ class SerializationTraits<ByteBuffer, void> {
                           bool* own_buffer) {
     *buffer = source;
     *own_buffer = true;
-    return Status::OK;
+    return g_core_codegen_interface->ok();
   }
 };
 

src/cpp/util/byte_buffer_cc.cc

@@ -43,18 +43,4 @@ Status ByteBuffer::Dump(std::vector<Slice>* slices) const {
   return Status::OK;
 }
 
-ByteBuffer::ByteBuffer(const ByteBuffer& buf) : buffer_(nullptr) {
-  operator=(buf);
-}
-
-ByteBuffer& ByteBuffer::operator=(const ByteBuffer& buf) {
-  if (this != &buf) {
-    Clear();  // first remove existing data
-  }
-  if (buf.buffer_) {
-    buffer_ = grpc_byte_buffer_copy(buf.buffer_);  // then copy
-  }
-  return *this;
-}
-
 }  // namespace grpc