Re: [Boost-users] Having program_options generate a round-trippable config file?

Subject: Re: [Boost-users] Having program_options generate a round-trippable config file?
From: André Prins (a.h.prins_at_[hidden])
Date: 2011-01-19 05:56:29

> ...  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