Mercurial > hg > Papers > 2022 > soto-sigos

diff Paper/src/AgdaStack.agda @ 0:14a0e409d574

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author soto <soto@cr.ie.u-ryukyu.ac.jp>
date Sun, 24 Apr 2022 23:13:44 +0900
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Paper/src/AgdaStack.agda	Sun Apr 24 23:13:44 2022 +0900
@@ -0,0 +1,13 @@
+data Element (a : Set) : Set where
+  cons : a -> Maybe (Element a) -> Element a
+
+datum : {a : Set} -> Element a -> a
+datum (cons a _) = a
+
+next : {a : Set} -> Element a -> Maybe (Element a)
+next (cons _ n) = n
+
+record SingleLinkedStack (a : Set) : Set where
+  field
+    top : Maybe (Element a)
+