Map a token that is a multiplicative operator to the corresponding additive operator.
Function:
(defun token-to-multiplicative-operator (token) (declare (xargs :guard (tokenp token))) (declare (xargs :guard (token-multiplicative-operator-p token))) (let ((__function__ 'token-to-multiplicative-operator)) (declare (ignorable __function__)) (cond ((token-punctuatorp token "*") (binop-mul)) ((token-punctuatorp token "/") (binop-div)) ((token-punctuatorp token "%") (binop-rem)) (t (prog2$ (impossible) (irr-binop))))))
Theorem:
(defthm binopp-of-token-to-multiplicative-operator (b* ((op (token-to-multiplicative-operator token))) (binopp op)) :rule-classes :rewrite)