Unfortunately you need to create separate functions for different sized tuples. For example:

tupleToList1 :: (a) -> [a]

tupleToList1 (x) = [x]

​

tupleToList2 :: (a, a) -> [a]

tupleToList2 (x, y) = [x, y]

​

tupleToList3 :: (a, a, a) -> [a]

tupleToList3 (x, y, z) = [x, y, z]

​

Unless you use the lens package (which is a rather complex and maybe not very beginner-friendly library).

For example:

import Control.Lens

(1, 2, 3) ^.. each