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Plain-string

Plain-stringp

Recognizer for plain-string structures.

Signature
(plain-stringp x) → *

Definitions and Theorems

Function: plain-stringp

(defun plain-stringp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'plain-stringp))
  (declare (ignorable __function__))
  (and (consp x)
       (eq (car x) :plain-string)
       (mbe :logic (and (alistp (cdr x))
                        (equal (strip-cars (cdr x))
                               '(content double-quote-p)))
            :exec (fty::alist-with-carsp (cdr x)
                                         '(content double-quote-p)))
       (b* ((content (cdr (std::da-nth 0 (cdr x))))
            (double-quote-p (cdr (std::da-nth 1 (cdr x)))))
         (and (string-element-listp content)
              (booleanp double-quote-p))))))

Theorem: consp-when-plain-stringp

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