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16 lines
347 B
Idris
16 lines
347 B
Idris
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||| View for traversing a list backwards
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public export
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data SnocList : List a -> Type where
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Empty : SnocList []
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Snoc : (x : a) -> (xs : List a) ->
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(rec : SnocList xs) -> SnocList (xs ++ [x])
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empty : SnocList (x :: xs) -> a
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empty Empty impossible
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snoc : SnocList (x :: xs) -> a
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snoc (Snoc _ _ _) impossible
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