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17 lines
530 B
17 lines
530 B
2 years ago
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Exercise 4.47: Louis Reasoner suggests that,
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since a verb phrase is either a verb or a verb phrase followed by a
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prepositional phrase, it would be much more straightforward to define the
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procedure parse-verb-phrase as follows (and similarly for noun phrases):
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(define (parse-verb-phrase)
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(amb (parse-word verbs)
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(list
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'verb-phrase
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(parse-verb-phrase)
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(parse-prepositional-phrase))))
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Does this work? Does the program’s behavior change if we interchange the order
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of expressions in the amb?
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