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14 lines
389 B
Idris
14 lines
389 B
Idris
data BST : a -> Type where
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Leaf : BST a
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Node : (root : a) -> (lt : BST a) -> (rt : BST a) -> BST a
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-- Checking that we can look under the @ to get rt and lt
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total
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insert : Ord a => a -> BST a -> BST a
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insert p Leaf = Node p Leaf Leaf
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insert p tree@(Node root lt rt) =
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case p `compare` root of
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GT => Node root lt (insert p rt)
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EQ => tree
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LT => Node root (insert p lt) rt
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