I just read through A5 (wow, that's long), and I agree with most of it. Some of it's really cool. Here's what makes me uneasy: The fact that a grammar rule auto-captures into a variable of its name.
Is this efficient? If I'm writing a syntax-directed translator, I usually don't need to capture the rules. The rules are run for their side-effects. I definitely see the win, but I see a lose in it too. Seems like an awful lot of memory's going to be wasted if I'm matching a big file with one C<$grammar.match>. Is there a way to tell it I<not> to capture something from a grammar rule? Should auto-capture really be default? Is someone going to tell me "well, it's really not inefficient because ... optimizes ...." That would relieve me greatly. I am waiting eagerly for Exegesis 5 :) This is fun stuff. Luke
