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Data-item

Data-item-p

Recognizer for data-item structures.

Signature
(data-item-p x) → *

Definitions and Theorems

Function: data-item-p

(defun data-item-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'data-item-p))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :data)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x))
                                 '(name value)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(name value)))
         (b* ((name (cdr (std::da-nth 0 (cdr x))))
              (value (cdr (std::da-nth 1 (cdr x)))))
           (and (plain-stringp name)
                (data-value-p value))))))

Theorem: consp-when-data-item-p

(defthm consp-when-data-item-p
  (implies (data-item-p x) (consp x))
  :rule-classes :compound-recognizer)