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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))
 (let ((__function__ 'ienvp))
  (declare (ignorable __function__))
  (and
   (mbe
      :logic (and (alistp x)
                  (equal (strip-cars x)
                         '(char+short+int+long+llong-format)))
      :exec
      (fty::alist-with-carsp x '(char+short+int+long+llong-format)))
   (b* ((char+short+int+long+llong-format (cdr (std::da-nth 0 x))))
     (and (char+short+int+long+llong-formatp
               char+short+int+long+llong-format)
          (char+short+int+long+llong-format-wfp
               char+short+int+long+llong-format))))))

Theorem: consp-when-ienvp

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