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Soft-implementation-core

Funvar-listp

Recoegnize true lists of function variables.

Signature
(funvar-listp funvars wrld) → yes/no
Arguments: wrld — Guard (plist-worldp wrld).
Returns: yes/no — Type (booleanp yes/no).

Definitions and Theorems

Function: funvar-listp

(defun funvar-listp (funvars wrld)
  (declare (xargs :guard (plist-worldp wrld)))
  (let ((__function__ 'funvar-listp))
    (declare (ignorable __function__))
    (if (atom funvars)
        (null funvars)
      (and (funvarp (car funvars) wrld)
           (funvar-listp (cdr funvars) wrld)))))

Theorem: booleanp-of-funvar-listp

(defthm booleanp-of-funvar-listp
  (b* ((yes/no (funvar-listp funvars wrld)))
    (booleanp yes/no))
  :rule-classes :rewrite)