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Ienv

Ienvp

Recognizer for ienv structures.

Signature
(ienvp x) → *

Definitions and Theorems

Function: ienvp

(defun ienvp (x)
 (declare (xargs :guard t))
 (and
  (mbe
      :logic (and (alistp x)
                  (equal (strip-cars x)
                         '(version short-bytes int-bytes long-bytes
                                   llong-bytes plain-char-signedp)))
      :exec (fty::alist-with-carsp
                 x
                 '(version short-bytes int-bytes long-bytes
                           llong-bytes plain-char-signedp)))
  (b* ((version (cdr (std::da-nth 0 x)))
       (short-bytes (cdr (std::da-nth 1 x)))
       (int-bytes (cdr (std::da-nth 2 x)))
       (long-bytes (cdr (std::da-nth 3 x)))
       (llong-bytes (cdr (std::da-nth 4 x)))
       (plain-char-signedp (cdr (std::da-nth 5 x))))
    (and (c::versionp version)
         (posp short-bytes)
         (posp int-bytes)
         (posp long-bytes)
         (posp llong-bytes)
         (booleanp plain-char-signedp)
         (<= short-bytes int-bytes)
         (<= int-bytes long-bytes)
         (<= long-bytes llong-bytes)
         (<= 2 short-bytes)
         (<= 2 int-bytes)
         (<= 4 long-bytes)
         (<= 8 llong-bytes)))))

Theorem: consp-when-ienvp

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