Accessing Bytevectors with the Array API

As an extension to the R6RS, Guile allows bytevectors to be manipulated with the array procedures (see Arrays). When using these APIs, bytes are accessed one at a time as 8-bit unsigned integers:

(define bv #vu8(0 1 2 3))

(array? bv)
⇒ #t

(array-rank bv)
⇒ 1

(array-ref bv 2)
⇒ 2

;; Note the different argument order on array-set!.
(array-set! bv 77 2)
(array-ref bv 2)
⇒ 77

(array-type bv)
⇒ vu8