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Transform

Transformp

Recognizer for transform structures.

Signature
(transformp x) → *

Definitions and Theorems

Function: transformp

(defun transformp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'transformp))
  (declare (ignorable __function__))
  (and
    (mbe :logic
         (and (alistp x)
              (equal (strip-cars x)
                     '(new-function-name old-function-name
                                         transform-name arguments)))
         :exec (fty::alist-with-carsp
                    x
                    '(new-function-name old-function-name
                                        transform-name arguments)))
    (b* ((new-function-name (cdr (std::da-nth 0 x)))
         (old-function-name (cdr (std::da-nth 1 x)))
         (transform-name (cdr (std::da-nth 2 x)))
         (arguments (cdr (std::da-nth 3 x))))
      (and (identifierp new-function-name)
           (identifierp old-function-name)
           (stringp transform-name)
           (transform-argument-listp arguments))))))

Theorem: consp-when-transformp

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