Recognizer for constraint structures.
(constraint-p x) → *
Function:
(defun constraint-p (x) (declare (xargs :guard t)) (let ((__function__ 'constraint-p)) (declare (ignorable __function__)) (and (std::prod-consp x) (b* ((?name (std::prod-car x)) (cond (std::prod-cdr x))) (svex-p cond)))))