You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1019 B
Racket
38 lines
1019 B
Racket
#lang br/quicklang
|
|
|
|
(define (read-syntax src-path in-port)
|
|
(define args (port->lines in-port))
|
|
(define module-datum `(module stacker-mod br/demo/stacker0
|
|
,@args))
|
|
(datum->syntax #f module-datum))
|
|
(provide read-syntax)
|
|
|
|
(define-macro (stacker-module-begin ARG ...)
|
|
#'(#%module-begin
|
|
(push ARG) ...
|
|
(display (first stack))))
|
|
(provide (rename-out [stacker-module-begin #%module-begin]))
|
|
|
|
(define stack empty)
|
|
|
|
(define (pop-stack!)
|
|
(define item (first stack))
|
|
(set! stack (rest stack))
|
|
item)
|
|
|
|
(define (push-stack! item) (set! stack (cons item stack)))
|
|
|
|
(define (push arg)
|
|
(cond
|
|
[(equal? arg "+")
|
|
(define sum (+ (pop-stack!) (pop-stack!)))
|
|
(push-stack! sum)]
|
|
[(equal? arg "*")
|
|
(define product (* (pop-stack!) (pop-stack!)))
|
|
(push-stack! product)]
|
|
[(string->number arg) (push-stack! (string->number arg))]))
|
|
|
|
|
|
(module+ test
|
|
(require rackunit)
|
|
(check-equal? (with-output-to-string (λ () (dynamic-require "stacker0-test.rkt" #f))) "36")) |