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beautiful-racket/beautiful-racket-demo/stackerizer.rkt

27 lines
585 B
Racket

#lang br/quicklang
(provide + *)
(define-macro (stackerizer-mb EXPR ...)
#'(#%module-begin
(for-each displayln (reverse (flatten EXPR ...)))))
(provide (rename-out [stackerizer-mb #%module-begin]))
(define-macro (define-ops OP ...)
#'(begin
(define-macro-cases OP
[(OP FIRST) #'FIRST]
[(OP FIRST NEXT (... ...))
#'(list 'OP FIRST (OP NEXT (... ...)))])
...))
(define-ops + *)
(module+ test
(require rackunit)
(check-equal? (with-output-to-string (λ () (dynamic-require "stackerizer-test.rkt" #f)))
"4
8
+
3
*
"))