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12 lines
689 B
12 lines
689 B
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Exercise 4.1: Notice that we cannot tell whether
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the metacircular evaluator evaluates operands from left to right or from right
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to left. Its evaluation order is inherited from the underlying Lisp: If the
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arguments to cons in list-of-values are evaluated from left to
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right, then list-of-values will evaluate operands from left to right;
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and if the arguments to cons are evaluated from right to left, then
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list-of-values will evaluate operands from right to left.
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Write a version of list-of-values that evaluates operands from left to
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right regardless of the order of evaluation in the underlying Lisp. Also write
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a version of list-of-values that evaluates operands from right to left.
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