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