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13 lines
482 B
13 lines
482 B
2 years ago
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Exercise 4.33: Ben Bitdiddle tests the lazy list
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implementation given above by evaluating the expression
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(car '(a b c))
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To his surprise, this produces an error. After some thought, he realizes that
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the “lists” obtained by reading in quoted expressions are different from the
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lists manipulated by the new definitions of cons, car, and
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cdr. Modify the evaluator’s treatment of quoted expressions so that
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quoted lists typed at the driver loop will produce true lazy lists.
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