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Context

Contextp

Recognizer for context structures.

Signature
(contextp x) → *

Definitions and Theorems

Function: contextp

(defun contextp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'contextp))
  (declare (ignorable __function__))
  (and
   (mbe
    :logic (and (alistp x)
                (equal (strip-cars x)
                       '(tops types functions variables
                              obligation-vars obligation-hyps)))
    :exec
    (fty::alist-with-carsp x
                           '(tops types functions variables
                                  obligation-vars obligation-hyps)))
   (b* ((tops (cdr (std::da-nth 0 x)))
        (types (cdr (std::da-nth 1 x)))
        (functions (cdr (std::da-nth 2 x)))
        (variables (cdr (std::da-nth 3 x)))
        (obligation-vars (cdr (std::da-nth 4 x)))
        (obligation-hyps (cdr (std::da-nth 5 x))))
     (and (toplevel-listp tops)
          (identifier-listp types)
          (function-header-listp functions)
          (variable-contextp variables)
          (typed-variable-listp obligation-vars)
          (obligation-hyp-listp obligation-hyps))))))

Theorem: consp-when-contextp

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