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