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22 lines
609 B
Plaintext
22 lines
609 B
Plaintext
import bool
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import stoneage
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monoid_Bool : sig { zero : Bool; plus : Bool -> Bool -> Bool }
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monoid_Bool = rec
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zero = False
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plus = \x -> \y -> x && y
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isSnake : (A : Tree) -> Tree A -> Bool
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isSnake _ x = case x of
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Snake -> True
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_ -> composFold ? ? compos_Tree Bool monoid_Bool ? isSnake x
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wideSnake : (A : Cat) -> Tree A -> Tree A
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wideSnake _ x = case x of
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Wide y -> let y' = wideSnake ? y
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in if isSnake CN y' then Thick y' else Wide y'
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_ -> composOp ? ? compos_Tree ? wideSnake x
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wideSnakeNP : Tree NP -> Tree NP
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wideSnakeNP = wideSnake NP
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