Use a C++ command line argument library for defining and parsing ROOT’s options.
ROOT’s binaries understand a mixture of short and long arguments. The parsing is done in C++,
with ad hoc C++ code. We would like to switch to a C++ command line argument library.
This would imply implementing ROOT’s options (e.g. in
using that library.
This is a companion discussion topic for the original entry at https://root.cern/blog/better-argument-parsing/