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Type-result

Type-resultp

Recognizer for type-result structures.

Signature
(type-resultp x) → *

Definitions and Theorems

Function: type-resultp

(defun type-resultp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'type-resultp))
    (declare (ignorable __function__))
    (and (consp x)
         (cond ((or (atom x) (eq (car x) :ok))
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 2)
                     (b* ((types (std::da-nth 0 (cdr x)))
                          (obligations (std::da-nth 1 (cdr x))))
                       (and (type-listp types)
                            (proof-obligation-listp obligations)))))
               (t (and (eq (car x) :err)
                       (and (true-listp (cdr x))
                            (eql (len (cdr x)) 1))
                       (b* ((info (std::da-nth 0 (cdr x))))
                         (any-p info))))))))

Theorem: consp-when-type-resultp

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