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System

Systemp

Recognizer for system structures.

Signature
(systemp x) → *

Definitions and Theorems

Function: systemp

(defun systemp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'systemp))
  (declare (ignorable __function__))
  (and
      (consp x)
      (eq (car x) :system)
      (mbe :logic (and (alistp (cdr x))
                       (equal (strip-cars (cdr x))
                              '(definitions constraints)))
           :exec (fty::alist-with-carsp (cdr x)
                                        '(definitions constraints)))
      (b* ((definitions (cdr (std::da-nth 0 (cdr x))))
           (constraints (cdr (std::da-nth 1 (cdr x)))))
        (and (definition-listp definitions)
             (constraint-listp constraints))))))

Theorem: consp-when-systemp

(defthm consp-when-systemp
  (implies (systemp x) (consp x))
  :rule-classes :compound-recognizer)