Created
July 15, 2015 14:10
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| type (_, _) arr = | |
| | Const : 'a -> (_, 'a) arr | |
| | Comp : ('a, 'b) arr * ('b, 'c) arr -> ('a, 'c) arr | |
| let rec eval : type a b . a -> (a, b) arr -> b = | |
| fun x arr -> | |
| match arr with | |
| | Const a -> a | |
| | Comp (u, v) -> eval (eval x u) v |
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