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Function-header

Function-headerp

Recognizer for function-header structures.

Signature
(function-headerp x) → *

Definitions and Theorems

Function: function-headerp

(defun function-headerp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'function-headerp))
   (declare (ignorable __function__))
   (and (mbe :logic (and (alistp x)
                         (equal (strip-cars x)
                                '(name inputs outputs)))
             :exec (fty::alist-with-carsp x '(name inputs outputs)))
        (b* ((name (cdr (std::da-nth 0 x)))
             (inputs (cdr (std::da-nth 1 x)))
             (outputs (cdr (std::da-nth 2 x))))
          (and (identifierp name)
               (typed-variable-listp inputs)
               (typed-variable-listp outputs))))))

Theorem: consp-when-function-headerp

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