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33 lines
1.0 KiB
Racket
33 lines
1.0 KiB
Racket
8 years ago
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#lang br/quicklang
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(define (read-syntax path port)
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(define args (port->lines port))
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(define arg-datums (filter-not void? (format-datums '~a args)))
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(define module-datum `(module stacker-mod br/demo/funstacker
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(nestify null ,@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 HANDLE-ARGS-EXPR)
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#'(#%module-begin
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(display (first HANDLE-ARGS-EXPR))))
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(provide (rename-out [stacker-module-begin #%module-begin]))
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(require (for-syntax sugar/debug))
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(define-macro-cases nestify
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[(nestify ARG0) #'ARG0]
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[(nestify ARG0 ARG1 ARG ...) #'(nestify (h3 ARG0 ARG1) ARG ...)])
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(provide nestify)
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(define (h3 stack arg)
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(cond
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[(number? arg) (cons arg stack)]
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[(or (equal? * arg) (equal? + arg))
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(define op-result (arg (first stack) (second stack)))
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(cons op-result (drop stack 2))]))
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(provide + * null)
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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 "funstacker-test.rkt" #f))) "36"))
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