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31 lines
841 B
Racket
31 lines
841 B
Racket
#lang br/quicklang
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#:read-syntax stacker-read-syntax
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#:#%module-begin stacker-module-begin
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(define (stacker-read-syntax src-path in-port)
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(define stack-args (port->list read in-port))
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(with-pattern ([(STACK-ARG ...) stack-args])
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(strip-identifier-bindings
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#'(module stacker-mod br/demo/stacker
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(push STACK-ARG) ...))))
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(define-macro (stacker-module-begin PUSH-EXPR ...)
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#'(#%module-begin
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PUSH-EXPR ...
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(display (first stack))))
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(define stack empty)
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(define (push arg)
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(cond
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[(number? arg) (set! stack (cons arg stack))]
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[else
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(define result (arg (first stack) (second stack)))
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(set! stack (cons result (drop stack 2)))]))
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(provide push)
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(provide + *)
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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")) |