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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
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10
Task/Constrained-genericity/TXR/constrained-genericity-1.txr Normal file
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(defmacro define-food-box (name food-type : supers . clauses)
(unless (subtypep food-type 'edible)
(error "~s requires edible type, not ~s" %fun% food-type))
^(defstruct ,name ,supers
food
(:method set-food (me food)
(unless (typep food ',food-type)
(error "~s: requires ~s object, not ~s" %fun% ',food-type food))
(set me.food food))
,*clauses))

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Task/Constrained-genericity/TXR/constrained-genericity-2.txr Normal file
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(define-struct-clause :food-box (food-type :form form)
(unless (subtypep food-type 'edible)
(compile-error form "~s requires edible type, not ~s" :food-box food-type))
^(food
(:method set-food (me food)
(unless (typep food ',food-type)
(error "~s: requires ~s object, not ~s" %fun% ',food-type food))
(set me.food food))))