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    • Format-string

    Format-stringp

    Recognizer for format-string structures.

    Signature
    (format-stringp x) → *

    Definitions and Theorems

    Function: format-stringp

    (defun format-stringp (x)
     (declare (xargs :guard t))
     (let ((__function__ 'format-stringp))
      (declare (ignorable __function__))
      (and
        (consp x)
        (eq (car x) :format-string)
        (mbe :logic (and (alistp (cdr x))
                         (equal (strip-cars (cdr x))
                                '(elements)))
             :exec (fty::alist-with-carsp (cdr x)
                                          '(elements)))
        (b* ((elements (cdr (std::da-nth 0 (cdr x)))))
          (and (char/container-listp elements)
               (char/container-list-no-open/close-brace-p elements))))))

    Theorem: consp-when-format-stringp

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