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