[Haskell-cafe] Problems with Bananas

2008-04-19 Thread Creighton Hogg
Hi, This isn't about Haskell per se, but I was reading the old Meijer et al. paper Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire I think there's a notational pun that's really confusing me. On page 12 we have the CataEval equation (|phi|) . in = phi . (|phi|)_L Now, the

Re: [Haskell-cafe] Problems with Bananas

2008-04-19 Thread Ross Paterson
On Sat, Apr 19, 2008 at 07:37:50PM -0500, Creighton Hogg wrote: This isn't about Haskell per se, but I was reading the old Meijer et al. paper Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire I think there's a notational pun that's really confusing me. On page 12 we