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#lang restructure/racket
(require "stream.rkt" "utils.rkt")
(provide (all-defined-out))
#|
approximates
https://github.com/mbutterick/restructure/blob/master/src/Reserved.coffee
|#
(define-subclass Streamcoder (Reserved type [count 1])
(define/augment (decode stream parent)
(send stream pos (+ (· stream pos) (size #f parent)))
(void))
(define/override (size [val #f] [parent #f])
(* (send type size) (resolve-length count #f parent)))
(define/augment (encode stream val [parent #f])
(send stream fill 0 (size val parent))))