Re: [Boost-users] program_options: iterate variable_map

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-04-25 01:45:55

Andrew Schweitzer wrote:

> Vladimir Prus wrote:
>> Fran?ois Duranleau wrote:
>>>variables_map inherits from std::map as well (though it's not documented
>>>as such).
> 
>>>The type of values iterated over are pairs of std::string and
>>>boost::program_options::variable_value.
>> 
>> 
>> I have no idea why BoostBook decided to hide that inheritance, but it was
>> designed that way, so that you can iterate variables_map. I've added
>> comment to that effect to varaibles_map class docs.
>> 
>  > - Volodya
> 
> Is there a way to extract the "original" string from variable_value? By
> this I mean the one taken from command line or ini file before
> conversion to int, float etc...? I suppose for vectors this would be
> impossible - you would need a vector of "original" strings. But this
> would at least cut the cases down. Is it possible to as a variable it
> holds a single or multiple values?

No, it's not possible, partly due to issues with vectors, and partly because
I did not though this will be requested. The best you can now is:

  parsed_options opts = parse_command_line(......);
  store(opts, vm);

And then iterate over opts.options. Each element has type 'option' which in
turn has member 'original_tokens'.

- Volodya