Re: [Boost-users] [Program Options] Requiring command-line options

Subject: Re: [Boost-users] [Program Options] Requiring command-line options
From: Diederick C. Niehorster (dcnieho_at_[hidden])
Date: 2010-06-03 23:40:00

So this is not in the documentation? Could you add a ticket in track
to fix the documentation?

Best,
Dee

On Thu, Jun 3, 2010 at 9:09 PM, immanuel litzroth <ilitzroth_at_[hidden]> wrote:
> This seems to work for me:
> Â ("namespace", po::value<std::string>(&args.name_space)->required(),"namespace
> to scrub")
> throws an exception when appropriate:
> ERROR - main: Caught an exception exiting main: missing required
> option namespace
> I remember having to hunt for it too.
> Greetz,
> Immanuel
>
> On Thu, Jun 3, 2010 at 9:41 AM, Jeremy Abramson <abramson_at_[hidden]> wrote:
>> Heya! Â I just thinking about switching from simpleOpt to BoostPO for command
>> line handling, mainly because of its support of configuration files. Â This
>> may be a stupid question, but I haven't seen anything about making a command
>> line parameter *required*. Â You'd think this is a pretty common thing, but I
>> didn't see any mention of it in the tutorials or anything. Â I guess I could
>> just make certain parameters default -1/NULL or something, and then test at
>> the end if they're still equal to that, but that seems a bit ugly.
>> Is there built in support (a flag in the "add_options" function or
>> something) for making certain parameters required?
>>
>> Thanks a lot!
>>
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