[Haskell-cafe] Re: Are there standard idioms for lazy,
pure error handling?
lemming at henning-thielemann.de
Mon Dec 7 14:36:27 EST 2009
For practical purposes I think Train should have swapped type parameters
in order to make Functor act on the type of the list elements.
data Train b a = Wagon a (Train b a)
| Loco b
More information about the Haskell-Cafe