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| 1 | (in-package "POLYNOMIAL")
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| 2 |
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| 3 | (defgeneric static-sugar (object)
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| 4 | (:documentation "Return statically calculated sugar of object OBJECT. That is,
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| 5 | the sugar value which does not assume that the object is a result of any prior calculations.")
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| 6 | (:method ((object monom))
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| 7 | (total-degree object))
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| 8 | (:method ((object poly))
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| 9 | (with-slots (termlist)
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| 10 | object
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| 11 | (loop for trm in termlist maximize (sugar trm)))))
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| 12 |
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| 13 | (defclass sugar ()
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| 14 | ((value :initarg :value :initform -1 :accessor sugar-value :type fixnum)))
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| 15 |
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| 16 | (defclass monom-with-sugar (monom sugar) ())
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| 17 |
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| 18 | (defmethod shared-initialize :after ((self monom-with-sugar) slot-names &rest initargs &key)
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| 19 | "Initialize sugar value based on the exponents."
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| 20 | (declare (ignore slot-names initargs))
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| 21 | (setf (slot-value self 'value) (static-sugar self)))
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| 22 |
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| 23 |
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