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Definition

Definitionp

Recognizer for definition structures.

Signature
(definitionp x) → *

Definitions and Theorems

Function: definitionp

(defun definitionp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'definitionp))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :definition)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x))
                                 '(name para body)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(name para body)))
         (b* ((name (cdr (std::da-nth 0 (cdr x))))
              (para (cdr (std::da-nth 1 (cdr x))))
              (body (cdr (std::da-nth 2 (cdr x)))))
           (and (stringp name)
                (string-listp para)
                (constraint-listp body))))))

Theorem: consp-when-definitionp

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