Re: [Boost-users] Boost.Program_options: Parsing arguments like "+a" possible?

Subject: Re: [Boost-users] Boost.Program_options: Parsing arguments like "+a" possible?
From: Diederick C. Niehorster (dcnieho_at_[hidden])
Date: 2011-08-08 08:20:47

I'm not sure, if it seems easy for you, go for it!

But have a look at this:
http://www.boost.org/doc/libs/1_47_0/doc/html/program_options/howto.html#id2192951

It might do the trick for you already, if you can change the plus into
some prefix or suffix that distinguishes it fomr the minus.

Best,
Dee

On Mon, Aug 8, 2011 at 19:36,  <boost_mailinglist_at_[hidden]> wrote:
> Hey,
>
> do you think to create  a own parser based on boost.qi is the best solution?
>
> Thanks
>
> Am 08.08.2011 13:15, schrieb Diederick C. Niehorster:
>>
>> You'll have to read through the source code (which isn't straight
>> forward). There will be a parser somewhere (maybe its easiest to find
>> the right file by putting a breakpoint before a call to
>> program_options and stepping through till you're in the parser. Once
>> there, the change is probably pretty trivial. And if you can do it in
>> a nice configurable way with a user exposed setting, the maintainers
>> might accept a patch. Though I'm worried about how you are going to
>> internally distinguish the + and - options...
>>
>> Best,
>> Dee
>>
>> On Mon, Aug 8, 2011 at 19:10,<boost_mailinglist_at_[hidden]> Â wrote:
>>>
>>> Am 08.08.2011 12:52, schrieb Leo Cacciari:
>>>>
>>>> Il 08/08/2011 12:47 PM, boost_mailinglist_at_[hidden] ha scritto:
>>>>
>>>>> Hello,
>>>>>
>>>>> the app is grown up step by step and a other person has taken the
>>>>> decission to use the "+" as a sign for an argument. (All the letters
>>>>> for
>>>>> the - are used.)
>>>>> My task is more or less to rewrite the old case() parser to a new one,
>>>>> possible based on boost.program_options, to get a clear structure. At
>>>>> the moment I'm not very interesting to change the argument style,
>>>>> because all the example and more has also to be change to the new
>>>>> style.
>>>>>
>>>> Well then I believe you're out of luck. AFAIK and as is stated in the
>>>> library documentation, start character for short options is - or / (the
>>>> latter to conform to windows usage).
>>>>
>>> Is there a way to get the library "patched" and replace the / through +?
>>> The app will only be used under linux.
>>>
>>> Thanks
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