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