What version of gRPC and what language are you using?

master, C++

What operating system (Linux, Windows, …) and version?

N/A

What runtime / compiler are you using (e.g. python version or version of gcc)

N/A

What did you do?

Used the gRPC C++ API

What did you expect to see?

A protobuf-based code generator for the C++ callback-based API on the client-side

What did you see instead?

A callback-based API for generic RPCs only

Anything else we should know about your project / environment?