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view final_pre/src/AgdaInstance.agda @ 7:0e8b9646d43f

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add final_pre
author e155702
date Sun, 17 Feb 2019 05:39:59 +0900
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_==Nat_ : Nat -> Nat -> Bool
zero    ==Nat zero    = true
(suc n) ==Nat zero    = false
zero    ==Nat (suc m) = false
(suc n) ==Nat (suc m) = n ==Nat m

instance
  natHas== : Eq Nat
  natHas== = record { _==_ = _==Nat_}