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9 lines
438 B
9 lines
438 B
2 years ago
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Exercise 2.84: Using the raise operation
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of Exercise 2.83, modify the apply-generic procedure so that it
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coerces its arguments to have the same type by the method of successive
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raising, as discussed in this section. You will need to devise a way to test
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which of two types is higher in the tower. Do this in a manner that is
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“compatible” with the rest of the system and will not lead to problems in
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adding new levels to the tower.
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