Mercurial > hg > Papers > 2020 > soto-midterm

diff src/AgdaInstance.agda.replaced @ 1:73127e0ab57c

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author soto@cr.ie.u-ryukyu.ac.jp
date Tue, 08 Sep 2020 18:38:08 +0900
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/AgdaInstance.agda.replaced	Tue Sep 08 18:38:08 2020 +0900
@@ -0,0 +1,9 @@
+_==Nat_ : Nat @$\rightarrow$@ Nat @$\rightarrow$@ 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_}