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beautiful-racket/beautiful-racket-demo/taco-decompiler-demo/run.rkt

28 lines
769 B
Racket

#lang br/quicklang
(module+ reader
(provide read-syntax))
(define (tokenize ip)
(for/list ([tok (in-port read ip)])
tok))
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(define (parse toks)
(for/list ([tok (in-list toks)])
(integer->char
(for/sum ([val (in-list tok)]
[power (in-naturals)]
#:when (eq? val 'taco))
(expt 2 power)))))
(define (read-syntax src ip)
(define toks (tokenize ip))
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(define parse-tree (parse toks))
(define src-string (list->string parse-tree))
(define racket-toks
(for/list ([tok (in-port read (open-input-string src-string))])
tok))
(strip-context
(with-syntax ([RACKET-TOKS racket-toks])
#'(module untaco racket
. RACKET-TOKS))))