Re: newlines and no newlines

Hi Cortland.

You noted:
 
   > The following grammar parses fine with no intermixed newlines.
   > It fails with newlines.  E.g.:
   > 
   > c t a b int B  # parses
   > c t a
   > b int B        # does not
   > 
   > I do not understand why the second fails.  Insight?

The problem is not in RecDescent. The problem is in:

   > while (<>)

which reads in a single line at a time and sends it to the parser.

So, in the case of intermixed newlines, it just reads in "c t a\n" or
just reads in "b int B\n", neither of which individually satisfies
the grammar.

And, to anticipate the obvious follow-up question: no, there is currently
no easy way to set up a RecDescent grammar that parses incrementally.
I'm working on that, but it really requires incremental regex matches, 
which will probably not be available until Perl 6. :-(

Damian