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31 lines
911 B
Racket
31 lines
911 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 stacker2-mod br/demo/stacker2
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STACK-ARG ...))))
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(define-macro (stacker-module-begin STACK-ARG ...)
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#'(#%module-begin
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(define stack-result
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(for/fold ([stack empty])
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([arg (in-list (list STACK-ARG ...))])
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(push arg stack)))
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(display (first stack-result))))
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(define (push arg stack)
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(cond
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[(number? arg) (cons arg stack)]
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[else
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(define result (arg (first stack) (second stack)))
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(cons result (drop stack 2))]))
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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 "stacker2-test.rkt" #f))) "36")) |