Get the def field from a lift-info.
(lift-info->def x) → def
This is an ordinary field accessor created by fty::defprod.
Function:
(defun lift-info->def$inline (x) (declare (xargs :guard (lift-infop x))) (declare (xargs :guard t)) (let ((__function__ 'lift-info->def)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and t x))) (definition-fix (cdr (std::da-nth 0 x)))) :exec (cdr (std::da-nth 0 x)))))
Theorem:
(defthm definitionp-of-lift-info->def (b* ((def (lift-info->def$inline x))) (definitionp def)) :rule-classes :rewrite)
Theorem:
(defthm lift-info->def$inline-of-lift-info-fix-x (equal (lift-info->def$inline (lift-info-fix x)) (lift-info->def$inline x)))
Theorem:
(defthm lift-info->def$inline-lift-info-equiv-congruence-on-x (implies (lift-info-equiv x x-equiv) (equal (lift-info->def$inline x) (lift-info->def$inline x-equiv))) :rule-classes :congruence)