Get the wrld-fn-len field from a ex-args.
This is an ordinary field accessor created by defprod.
Function:
(defun ex-args->wrld-fn-len$inline (x) (declare (xargs :guard (ex-args-p x))) (declare (xargs :guard t)) (let ((acl2::__function__ 'ex-args->wrld-fn-len)) (declare (ignorable acl2::__function__)) (mbe :logic (b* ((x (and t x))) (nfix (cdr (std::da-nth 3 x)))) :exec (cdr (std::da-nth 3 x)))))
Theorem:
(defthm natp-of-ex-args->wrld-fn-len (b* ((wrld-fn-len (ex-args->wrld-fn-len$inline x))) (natp wrld-fn-len)) :rule-classes :rewrite)
Theorem:
(defthm ex-args->wrld-fn-len$inline-of-ex-args-fix-x (equal (ex-args->wrld-fn-len$inline (ex-args-fix x)) (ex-args->wrld-fn-len$inline x)))
Theorem:
(defthm ex-args->wrld-fn-len$inline-ex-args-equiv-congruence-on-x (implies (ex-args-equiv x x-equiv) (equal (ex-args->wrld-fn-len$inline x) (ex-args->wrld-fn-len$inline x-equiv))) :rule-classes :congruence)