The "scrap your boilerplate" scheme for generics in Haskell addresses
traversals, queries, transformations, parallel zipping and the like.
I've only briefly felt like I understood it, so I was going to
revise before trying to adapt it to Perl 6.
(Any lambdacamels out there that do understand this stuff?)
There's a paper called "Scrap your boilerplate with XPath-like
combinators" <http://homepages.cwi.nl/~ralf/popl07/> which ties
nicely into this thread. It and other SYB papers provide a
useful perspective on this traversal and matching domain,
even if the Haskell details are tricky.
SYB home: http://www.cs.vu.nl/boilerplate/
Brad
--
... One should think well then speak. ... -- Hagakure
