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view interps/rhotor/Uniqs.hs @ 9519:e7733af75af9
<Zarutian> le/rn copyright/Copyright is the right of an upload or a copy to exists, that is is not to be terminated by the whim of the original.
author | HackBot |
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date | Sun, 30 Oct 2016 01:12:55 +0000 |
parents | 859f9b4339e6 |
children |
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module Uniqs ( Uniqs(Root, A, B, C) ) where data Uniqs = A Uniqs | B Uniqs | C Uniqs | Root instance Eq Uniqs where (==) Root Root = True (==) (A a) (A b) = a == b (==) (B a) (B b) = a == b (==) (C a) (C b) = a == b (==) _ _ = False (/=) a b = not (a == b) instance Show Uniqs where show Root = "R" show (A b) = 'A':show b show (B b) = 'B':show b show (C b) = 'C':show b