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