Get the expr? field from a dirdeclor-array.
(dirdeclor-array->expr? x) → expr?
This is an ordinary field accessor created by fty::defprod.
Function:
(defun dirdeclor-array->expr?$inline (x) (declare (xargs :guard (dirdeclorp x))) (declare (xargs :guard (equal (dirdeclor-kind x) :array))) (let ((__function__ 'dirdeclor-array->expr?)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and (equal (dirdeclor-kind x) :array) x))) (expr-option-fix (std::da-nth 2 (cdr x)))) :exec (std::da-nth 2 (cdr x)))))
Theorem:
(defthm expr-optionp-of-dirdeclor-array->expr? (b* ((expr? (dirdeclor-array->expr?$inline x))) (expr-optionp expr?)) :rule-classes :rewrite)
Theorem:
(defthm dirdeclor-array->expr?$inline-of-dirdeclor-fix-x (equal (dirdeclor-array->expr?$inline (dirdeclor-fix x)) (dirdeclor-array->expr?$inline x)))
Theorem:
(defthm dirdeclor-array->expr?$inline-dirdeclor-equiv-congruence-on-x (implies (dirdeclor-equiv x x-equiv) (equal (dirdeclor-array->expr?$inline x) (dirdeclor-array->expr?$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm dirdeclor-array->expr?-when-wrong-kind (implies (not (equal (dirdeclor-kind x) :array)) (equal (dirdeclor-array->expr? x) (expr-option-fix nil))))