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Func

Func-p

Recognizer for func structures.

Signature
(func-p x) → *

Definitions and Theorems

Function: func-p

(defun func-p (x)
 (declare (xargs :guard t))
 (let ((acl2::__function__ 'func-p))
  (declare (ignorable acl2::__function__))
  (and
   (mbe
    :logic (and (alistp x)
                (equal (strip-cars x)
                       '(name formals guard
                              returns more-returns expansion-depth
                              flattened-formals flattened-returns)))
    :exec (fty::alist-with-carsp
               x
               '(name formals guard
                      returns more-returns expansion-depth
                      flattened-formals flattened-returns)))
   (b* ((name (cdr (std::da-nth 0 x)))
        (formals (cdr (std::da-nth 1 x)))
        (guard (cdr (std::da-nth 2 x)))
        (returns (cdr (std::da-nth 3 x)))
        (more-returns (cdr (std::da-nth 4 x)))
        (expansion-depth (cdr (std::da-nth 5 x)))
        (flattened-formals (cdr (std::da-nth 6 x)))
        (flattened-returns (cdr (std::da-nth 7 x))))
     (and (symbolp name)
          (decl-listp formals)
          (hint-pair-p guard)
          (decl-listp returns)
          (hint-pair-listp more-returns)
          (natp expansion-depth)
          (symbol-listp flattened-formals)
          (symbol-listp flattened-returns))))))

Theorem: consp-when-func-p

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