Could you provide some I/O example scripts in C++?
You'll need some utility functions which abstract away the annoying complex tasks of e.g. "read a dataset with this name". For example see the HDF5 helper functions from MUSIC. Then it should be pretty straight forward to copy the logic of e.g. loadSubset() using these helpers.
If you do manage this and recreate all the basic functionality of the example scripts, do let me know, I would be happy to add to the website as a resource people might be interested in.
Has there been any progress on a C++ reading example script?