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