[boost] Re: program-options, --switch and --no-switch

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-11-02 02:45:59

Neal D. Becker wrote:

> Vladimir Prus wrote:
> 
>> Hi Neal,
>> 
>>> Any suggestion on how to implement the common gnu idiom:
>>> 
>>> --switch and --no-switch?
>>> 
>>> bool_switch seems perfect for implementing --switch, but what about
>>> --no-switch (which should set switch_value to false)?
>> 
>> What do you think about the approach in examples/custom_syntax.cpp?
>> 
>> - Volodya
>> 
> 
> I think it's not documented.

Actually, 

   http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/program_options/howto.html#id556929

is supposed to discuss that example.

> I don't see any mention of extra_parser in:
> file:/usr/local/src/boost_1_32_0/doc/html/program_options/reference.html

You're right, unfortunately :-(
I've added some comments, on trunk and release branch, and would suggest
that you just copy the usage of 'extra_parser' from the example.

- Volodya