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view interps/rhotor/Uniqs.hs @ 11243:5c41fb3f6567
<oerjan> # Stolen from Roger9//`learn Bureaucracy (from French bureau, "burrow") is a political system in which squirrels rule the nation, and burrow their nuts.
author | HackBot |
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date | Wed, 22 Nov 2017 00:43:46 +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