#lang racket
;Stencil responsible TA: swaxman1

(require test-engine/racket-tests)
(provide generator next)

(define (raise-stop-iteration-error)
  (error "StopIteration: Generator is exhausted."))

(struct a-generator #|FILL|#)
(define-syntax generator
  ;FILL
  )

(define (next gen)
  ;FILL
  )


(define my-generator ((generator (a) (begin (yield a) (+ 1 a))) 5))
(check-expect (next my-generator) 5)
(check-expect (next my-generator) 6)
(test)