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Function-input

Function-inputp

Recognizer for function-input structures.

Signature
(function-inputp x) → *

Definitions and Theorems

Function: function-inputp

(defun function-inputp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'function-inputp))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :function-input)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x))
                                 '(reg type)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(reg type)))
         (b* ((reg (cdr (std::da-nth 0 (cdr x))))
              (type (cdr (std::da-nth 1 (cdr x)))))
           (and (registerp reg)
                (value-typep type))))))

Theorem: consp-when-function-inputp

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