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Postings from May 2005
> On May 26, Patrick R. Michaud said: > >> <commit> N backtracking fails completely >> <cut> N remove what matched up to this point from the >> string >> <after P> N we must be after the pattern P >> <!after P> N we must NOT be after the pattern P >> <before P> N we must be before the pattern P >> <!before P> N we must NOT be before the pattern P >> >> As with ':words', etc., I'm not sure that these qualify as "tokens" >> when parsing the regex -- the tokens are actually "<" or "<!" and I'm curious if <commit> and <cut> "capture" anything. They don't start with '?', so following the guidelines, it would appear they capture, but that doesn't make sense. Should they be written as <?commit> and <?cut>, or is the fact that they capture silently ignored because they're not consuming anything? Same thing with <null> and <prior>. And with <after P> and <before P>. It should be assumed that <!after P> doesn't capture because it can only capture if P matches, in which case <!after P> fails. So, what's the deal? -- Jeff "japhy" Pinyan % How can we ever be the sold short or RPI Acacia Brother #734 % the cheated, we who for every service http://japhy.perlmonk.org/ % have long ago been overpaid? http://www.perlmonks.org/ % -- Meister EckhartThread Previous | Thread Next