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