Re: newlines and no newlines

I try giving the entire text in one call and still fail...

$parser->db( $schema = ::loadfile( $schemafile ) );

???

Cortland Starrett

On Mon, 26 Nov 2001, Damian Conway wrote:

> 
> 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