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Extdecl

Extdeclp

Recognizer for extdecl structures.

Signature
(extdeclp x) → *

Definitions and Theorems

Function: extdeclp

(defun extdeclp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'extdeclp))
    (declare (ignorable __function__))
    (and (consp x)
         (cond ((or (atom x) (eq (car x) :fundef))
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 1)
                     (b* ((unwrap (std::da-nth 0 (cdr x))))
                       (fundefp unwrap))))
               ((eq (car x) :decl)
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 1)
                     (b* ((unwrap (std::da-nth 0 (cdr x))))
                       (declp unwrap))))
               ((eq (car x) :empty)
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 0)
                     (b* nil t)))
               (t (and (eq (car x) :asm)
                       (and (true-listp (cdr x))
                            (eql (len (cdr x)) 1))
                       (b* ((unwrap (std::da-nth 0 (cdr x))))
                         (asm-stmtp unwrap))))))))

Theorem: consp-when-extdeclp

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