On Tue, Nov 08, 2005 at 12:57:18PM +0000, [EMAIL PROTECTED] wrote: > "Patrick R. Michaud" <[EMAIL PROTECTED]> wrote: > :And we also get \d:0123 as a cheap way of saying \d<?null>0123. > > I think the ':' changes the meaning of the rule, so you still need > '\d<?null>0123' (or preferably something shorter) for the uncut semantic.
Not really; the ':' (as 'cut') simply means to not retry the preceding atom, and in this case since the previous atom has no backtracking associated with it already (a '\d' matches a single digit or fails), so the ':' is effectively a no-op. In fact, in PGE '\d' and '\d:' generate exactly the same code. Pm
