Since there isn't any documentation about this, what's the expected behavior here?  Does it require that if you include the argument, you must include a parameter, or does it mean that you have to require the argument itself?  The latter is the preferred behavior (for me) but from some brief experimentation, that doesn't seem to be the case.  Of course, I'm not even sure I'm using it correctly, since it's not documented anywhere.

Any tips?

Thanks!
J.


Message: 5
Date: Fri, 4 Jun 2010 11:40:00 +0800
From: "Diederick C. Niehorster" <dcnieho@gmail.com>
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] [Program Options] Requiring command-line
	options
Message-ID:
	<AANLkTilD9kvnz0sU03y5kh5CUwWKNLCXxWid-zwAicot@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

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@gmail.com> wrote:

> This seems to work for me:
> ?("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@isi.edu> wrote:
    
>> Heya! ?I just thinking about switching from simpleOpt to BoostPO for command
>> line handling, mainly because of its support of configuration files. ?This
>> may be a stupid question, but I haven't seen anything about making a command
>> line parameter *required*. ?You'd think this is a pretty common thing, but I
>> didn't see any mention of it in the tutorials or anything. ?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!
>>
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users@lists.boost.org
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>>
      
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