9 lines
355 B
Text
9 lines
355 B
Text
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(define-struct-clause :food-box (food-type :form form)
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(unless (subtypep food-type 'edible)
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(compile-error form "~s requires edible type, not ~s" :food-box food-type))
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^(food
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(:method set-food (me food)
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(unless (typep food ',food-type)
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(error "~s: requires ~s object, not ~s" %fun% ',food-type food))
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(set me.food food))))
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