Hi Stephen,
It actually sounds like your representation has structure, but you
dislike structure because it's hard to work with. The solution is a
generics library, and I recommend Uniplate:
http://community.haskell.org/~ndm/uniplate
Imagine you have a ridiculously complex AST, with beam groups under
tuplets etc, and you want to delete the first item from every beam
group:
transform f
where f (Beam (x:xs)) = Beam xs
f x = x
Uniplate moves through tuplets and any other hierarchical syntax, so
you just specify the transformation. My guess is if you throw away the
structure then you'll need it back for some operations.
Thanks, Neil
2010/3/22 Stephen Tetley
Hi Malcolm
Thanks - particularly I don't want to go to an AST because its I'm finding it too convoluted 'shape wise' - processing beam groups inside tuplets etc. is a nightmare - music representations have had at least eight centuries of ad hoc extension.
I know Norman Ramsey and colleagues papers on low-level representations - I'll give them a re-reading.
Thanks again
Stephen _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe