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• Nats-from

Nats-from-exec

Signature

(nats-from-exec a b nrev) → nrev

Arguments

a — Guard (natp a).

b — Guard (natp b).

Definitions and Theorems

Function: nats-from-exec

(defun nats-from-exec (a b nrev)
  (declare (xargs :stobjs (nrev)))
  (declare (xargs :guard (and (natp a) (natp b))))
  (declare (xargs :guard (<= a b)))
  (let ((__function__ 'nats-from-exec))
    (declare (ignorable __function__))
    (let ((a (lnfix a)) (b (lnfix b)))
      (if (mbe :logic (zp (- b a)) :exec (= a b))
          (nrev-fix nrev)
        (let ((nrev (nrev-push a nrev)))
          (nats-from-exec (+ 1 a) b nrev))))))