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Member-type

Member-typep

Recognizer for member-type structures.

Signature
(member-typep x) → *

Definitions and Theorems

Function: member-typep

(defun member-typep (x)
  (declare (xargs :guard t))
  (and (consp x)
       (eq (car x) :member-type)
       (mbe :logic (and (alistp (cdr x))
                        (equal (strip-cars (cdr x))
                               '(name type)))
            :exec (fty::alist-with-carsp (cdr x)
                                         '(name type)))
       (b* ((name (cdr (std::da-nth 0 (cdr x))))
            (type (cdr (std::da-nth 1 (cdr x)))))
         (and (identp name) (typep type)))))

Theorem: consp-when-member-typep

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