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beautiful-racket/beautiful-racket-demo/taco-compiler-demo/main.rkt

23 lines
590 B
Racket

#lang br/quicklang
(module+ reader
(provide read-syntax))
(define (tokenize ip)
(for/list ([tok (in-port read-char ip)])
tok))
(define (parse-char c)
(define int (modulo (char->integer c) 128))
(for/list ([bit (in-range 7)])
(if (bitwise-bit-set? int bit)
'taco
null)))
(define (read-syntax src ip)
(define toks (tokenize ip))
(define parse-tree (map parse-char toks))
(strip-context
(with-syntax ([(PARSED-CHAR ...) parse-tree])
#'(module tacofied racket
(for-each displayln '(PARSED-CHAR ...))))))