Re: [Haskell-cafe] Short circuiting and the Maybe monad

Janis Voigtlaender wrote:

http://wwwtcs.inf.tu-dresden.de/~voigt/mpc08.pdf

"It is well-known that trees with substitution form a monad." ...OK, I just learned something new. Hanging around Haskell Cafe can be so illuminating! :-) Now, if only I could actually comprehend the rest of the paper... o_O