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Program

Programp

Recognizer for program structures.

Signature
(programp x) → *

Definitions and Theorems

Function: programp

(defun programp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'programp))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :program)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x)) '(package)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(package)))
         (b* ((package (cdr (std::da-nth 0 (cdr x)))))
           (packagep package)))))

Theorem: consp-when-programp

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