Get the fty::val field from a tag-info-option-some.
(tag-info-option-some->val x) → fty::val
This is an ordinary field accessor created by fty::defprod.
Function:
(defun tag-info-option-some->val$inline (x) (declare (xargs :guard (tag-info-optionp x))) (declare (xargs :guard x)) (let ((__function__ 'tag-info-option-some->val)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and x x))) (tag-info-fix x)) :exec x)))
Theorem:
(defthm tag-infop-of-tag-info-option-some->val (b* ((fty::val (tag-info-option-some->val$inline x))) (tag-infop fty::val)) :rule-classes :rewrite)
Theorem:
(defthm tag-info-option-some->val$inline-of-tag-info-option-fix-x (equal (tag-info-option-some->val$inline (tag-info-option-fix x)) (tag-info-option-some->val$inline x)))
Theorem:
(defthm tag-info-option-some->val$inline-tag-info-option-equiv-congruence-on-x (implies (tag-info-option-equiv x x-equiv) (equal (tag-info-option-some->val$inline x) (tag-info-option-some->val$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm tag-info-option-some->val-when-wrong-kind (implies (not x) (equal (tag-info-option-some->val x) (tag-info-fix nil))))