Recognizer for maybe-typed-variable structures.
(maybe-typed-variablep x) → *
Function:
(defun maybe-typed-variablep (x) (declare (xargs :guard t)) (let ((__function__ 'maybe-typed-variablep)) (declare (ignorable __function__)) (cond ((not x) (b* nil t)) (t (b* ((fty::val x)) (typed-variablep fty::val))))))