1 module Main(main) where
3 data Burble a = B1 { op1 :: a -> Int, op2 :: Int -> a, op3 :: Int}
4 | B2 { op2 :: Int -> a, op4 :: Int -> Int }
7 f1 :: Int -> Burble Int
8 f1 n = B1 { op1 = \x->x+n, op2 = \x -> x, op3 = n }
10 f2 :: Burble a -> Int -> Int
11 f2 r@(B1 {op1, op2}) n = op1 (op2 n) + op3 r
13 f3 :: Burble a -> Burble a
14 f3 x@(B1 {op3}) = x {op3 = op3+1}
16 main = print (f2 (f3 (f1 3)) 4)