Hi all, Here's a failed attempt at creating a Layout class. It doesn't compile, and I've very little idea how to fix that, and am hesitant to propose that we include in xmonad code that I don't understand, which alas includes pretty much all MPTCs. I understand, however, that there are those of you who grok such things, so if you want to fix things up and explain them to me, that would be great. I don't think I've ever written code that I understood using a MPTC. :( David (fortunately, I have no problem writing code using GADTs, phantom types, existential types, etc...) Fri Sep 14 16:53:32 EDT 2007 David Roundy <droundy@darcs.net> * non-working patch for making Layout class.