7 lines
274 B
Text
7 lines
274 B
Text
class FoodBox(*food { .all { .respond_to(:eat) } }) { }
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class Fruit { method eat { ... } }
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class Apple < Fruit { }
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say FoodBox(Fruit(), Apple()).dump #=> FoodBox(food: [Fruit(), Apple()])
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say FoodBox(Apple(), "foo") #!> ERROR: class `FoodBox` !~ (Apple, String)
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