Get the before field from a hex-frac-const.
(hex-frac-const->before x) → before
This is an ordinary field accessor created by fty::defprod.
Function:
(defun hex-frac-const->before$inline (x) (declare (xargs :guard (hex-frac-constp x))) (declare (xargs :guard t)) (let ((__function__ 'hex-frac-const->before)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and t x))) (str::hex-digit-char-list-fix (cdr (std::da-nth 0 x)))) :exec (cdr (std::da-nth 0 x)))))
Theorem:
(defthm hex-digit-char-listp-of-hex-frac-const->before (b* ((before (hex-frac-const->before$inline x))) (hex-digit-char-listp before)) :rule-classes :rewrite)
Theorem:
(defthm hex-frac-const->before$inline-of-hex-frac-const-fix-x (equal (hex-frac-const->before$inline (hex-frac-const-fix x)) (hex-frac-const->before$inline x)))
Theorem:
(defthm hex-frac-const->before$inline-hex-frac-const-equiv-congruence-on-x (implies (hex-frac-const-equiv x x-equiv) (equal (hex-frac-const->before$inline x) (hex-frac-const->before$inline x-equiv))) :rule-classes :congruence)