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view paper/src/AgdaStack.agda @ 19:046b2b20d6c7 default tip

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fix
author ryokka
date Mon, 09 Mar 2020 11:25:49 +0900
parents c7acb9211784
children
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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)