Get the unwrap field from a label-name.
This is an ordinary field accessor created by fty::defprod.
Function:
(defun label-name->unwrap$inline (x) (declare (xargs :guard (labelp x))) (declare (xargs :guard (equal (label-kind x) :name))) (let ((__function__ 'label-name->unwrap)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and (equal (label-kind x) :name) x))) (ident-fix (std::da-nth 0 (cdr x)))) :exec (std::da-nth 0 (cdr x)))))
Theorem:
(defthm identp-of-label-name->unwrap (b* ((unwrap (label-name->unwrap$inline x))) (identp unwrap)) :rule-classes :rewrite)
Theorem:
(defthm label-name->unwrap$inline-of-label-fix-x (equal (label-name->unwrap$inline (label-fix x)) (label-name->unwrap$inline x)))
Theorem:
(defthm label-name->unwrap$inline-label-equiv-congruence-on-x (implies (label-equiv x x-equiv) (equal (label-name->unwrap$inline x) (label-name->unwrap$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm label-name->unwrap-when-wrong-kind (implies (not (equal (label-kind x) :name)) (equal (label-name->unwrap x) (ident-fix nil))))