Get the width field from a segment-driver.
(segment-driver->width x) → width
This is an ordinary field accessor created by defprod.
Function:
(defun segment-driver->width$inline (x) (declare (xargs :guard (segment-driver-p x))) (declare (xargs :guard t)) (let ((__function__ 'segment-driver->width)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and t x))) (pos-fix (std::prod-cdr (std::prod-car x)))) :exec (std::prod-cdr (std::prod-car x)))))
Theorem:
(defthm posp-of-segment-driver->width (b* ((width (segment-driver->width$inline x))) (posp width)) :rule-classes :type-prescription)
Theorem:
(defthm segment-driver->width$inline-of-segment-driver-fix-x (equal (segment-driver->width$inline (segment-driver-fix x)) (segment-driver->width$inline x)))
Theorem:
(defthm segment-driver->width$inline-segment-driver-equiv-congruence-on-x (implies (segment-driver-equiv x x-equiv) (equal (segment-driver->width$inline x) (segment-driver->width$inline x-equiv))) :rule-classes :congruence)