[QUESTION] How do I use OSD through C++?

[dengjfzh]

What is your question?
How do I use OSD through C++? What is the specific structure of the elements parameter of OSD::operator()?

[dengjfzh]

I found some test code in CV-CUDA/tests/cvcuda/system/TestOpOSD.cpp. I saw that the type of elements actually passed is NVCVElementsImpl*, which is defined in the header file CV-CUDA/src/cvcuda/priv/Types.hpp, but it doesn't seem to be part of the public interface. Why?