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24 lines
660 B
Plaintext
24 lines
660 B
Plaintext
// b = (left ~ right.left)
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// a = (b ~ right.right)
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// return a
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BBT.lft_rotate
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: ∀(K: *)
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∀(V: *)
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∀(size: #U60)
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∀(key: K)
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∀(val: V)
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∀(lft: (BBT K V))
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∀(rgt: (BBT K V))
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(BBT K V)
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= λK λV λsize λkey λval λlft λrgt
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let P = λx ∀(key: K) ∀(val: V) ∀(lft: (BBT K V)) (BBT K V)
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let bin = λ_size λrgt.key λrgt.val λrgt.lft λrgt.rgt
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λkey λval λlft
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let b = (BBT.new_node K V key val lft rgt.lft)
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let a = (BBT.new_node K V rgt.key rgt.val b rgt.rgt)
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a
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let tip =
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λkey λval λlft
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(BBT.bin K V size key val lft (BBT.tip K V))
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((~rgt P bin tip) key val lft)
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