I have a type that is as follows:
data PlayerState =
FugitiveState {
tickets :: Array Ticket Int,
fHistory :: [Ticket] } |
DetectiveState {
tickets :: Array Ticket Int,
dHistory :: [Stop] }
I have a few functions that act on PlayerState.
move :: PlayerState -> PlayerState
move DetectiveState ... =
move FugitivieState ... =
I was wondering if it's better to define them as type classes with the
operations defined in the class. What do haskellian's do? Oh and if I say
Instance Foo Baz where
...
and only define a few of the operations in Foo... bdoes Baz take on some
default methods?
- mike
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