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38 lines
994 B
Racket
38 lines
994 B
Racket
#lang br/quicklang
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(define (read-syntax src-path in-port)
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(define args (port->list read in-port))
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(define arg-datums (format-datums '(handle ~a) args))
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(define module-datum `(module mod-name br/demo/stacker
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,@arg-datums))
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(datum->syntax #f module-datum))
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(provide read-syntax)
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(define-macro (stacker-module-begin ARG-DATUM-STX ...)
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#'(#%module-begin
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ARG-DATUM-STX ...
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(display (pop-stack!))))
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(provide (rename-out [stacker-module-begin #%module-begin]))
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(define stack empty)
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(define (pop-stack!)
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(define item (first stack))
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(set! stack (rest stack))
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item)
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(define (push-stack! item)
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(set! stack (cons item stack)))
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(define (handle arg)
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(cond
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[(number? arg) (push-stack! arg)]
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[else
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(define op-result (arg (pop-stack!) (pop-stack!)))
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(push-stack! op-result)]))
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(provide handle + *)
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(module+ test
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(require rackunit)
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(check-equal? (with-output-to-string (λ () (dynamic-require "stacker-test.rkt" #f))) "36")) |