Re: [Boost-users] Re: spirit question

From: Cory Nelson (phrosty_at_[hidden])
Date: 2004-11-06 18:51:11

Are there any tools to translate the various BNF formats into Spirit
code?  I think this would be very useful.

On Sat, 06 Nov 2004 11:13:05 -0500, Jeffrey Holle
<jeff.holle_at_[hidden]> wrote:
> Of "course".
> That is what the optional operator is for.
> Something like:
>   *alpha_p << !(ch_p('-') << *digit_p)
> 
> Cory Nelson wrote:
> > I'm trying to write a parser with elements that might not occur - is
> > this possible?
> >
> > like:
> >
> > string ['-' number]
> >
> > that matches "foo" or "foo-123"
> >
> 
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-- 
Cory Nelson
http://www.int64.org