I know of VisualD c++ to d conversion wizzard [1] and LLVM tooling based CPP2D [2], both of them aiming for whole cpp conversion. But I a searching for something lightweight like HTOD extended to C++.
[1] https://rainers.github.io/visuald/visuald/CppConversion.html [2] https://github.com/lhamot/CPP2D