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Ident

Identp

Recognizer for ident structures.

Signature
(identp x) → *

Definitions and Theorems

Function: identp

(defun identp (x)
  (declare (xargs :guard t))
  (and (true-listp x)
       (eql (len x) 1)
       (b* ((unwrap (std::da-nth 0 x)))
         (acl2::any-p unwrap))))

Theorem: consp-when-identp

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