Re: [boost] [spirit]

Subject: Re: [boost] [spirit]
From: Thomas Klimpel (Thomas.Klimpel_at_[hidden])
Date: 2009-06-05 05:34:06

Chandrashekhar Kumar wrote:
> But it is not working for the below as well:
>
> 1.0,2.0,3.0,4.0
> 5.0,6.0,7.0,8.0

The question why this doesn't work can be simplified to the question why

bool matches =
  parse ("1.0,2.0,3.0,4.0\n5.0,6.0,7.0,8.0",
         real_p >> *(',' >> real_p)
         , space_p).full;

will result in matches being "false".

I think the reason is that the skip parser "space_p" will eat the "\n" between "4.0" and "5.0", but it will not insert a ','. A potential solution might be to make ',' optional by writing !',':

bool matches =
  parse ("1.0,2.0,3.0,4.0\n5.0,6.0,7.0,8.0",
         real_p >> *(!',' >> real_p)
         , space_p).full;

will probably result in matches being "true".

Regards,
Thomas