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Alias

Alias-p

Recognizer for alias structures.

Signature
(alias-p x) → *

Definitions and Theorems

Function: alias-p

(defun alias-p (x)
  (declare (xargs :guard t))
  (let ((acl2::__function__ 'alias-p))
    (declare (ignorable acl2::__function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x) '(name val)))
              :exec (fty::alist-with-carsp x '(name val)))
         (b* ((name (cdr (std::da-nth 0 x)))
              (val (cdr (std::da-nth 1 x))))
           (and (sv::svar-p name) (svex-p val))))))

Theorem: consp-when-alias-p

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