... I'd like to save a program_options::parse_config_file-friendly file containing the final values obtained. Such a config file could be given back to the program and would identically reproduce the options used.
Hi Rhys, About a year ago, I had a similar need and wrote a crude but useful Settings class with save() and load() methods. I am not saying it is immediately fit for purpose, as it was specifically tailored to my own needs, but perhaps it can serve as inspiration
1) Accessing the information directly from variables_map seems difficult due to variables_map's use of type erasure and the fact that it does not save the tokens from which values are derived.
I seem to recollect that the save() method did exactly this: iterating through the variable_map. I used some string manipulation to split section-names from actual value-names, but that was all. Regards, Andre