Well, you will be able to write parsers in perl 6. But will that be "real" parsers, as in "fast"? Because I got the impression it's basically a mixture of perl5 regexes and Parse::RecDescent. Now don't get me wrong, recursive descent parsing is powerfull. But it's also dead slow, because there's hardly any room for optimization. It just comes down to: try all rules in order, backtrack as much as needed. Powerfull, but slow.

Real parsers use LL(1), LR(1) or similar grammars, where looking ahead a fixed, small amount of symbols will determine which rule to apply with no need for backtracking if the rule fails.

Abigail

In reply to Re: Favorite Perl 6 feature? by Abigail-II
in thread Favorite Perl 6 feature? by zby

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