26 lines
801 B
Racket
26 lines
801 B
Racket
;;; utils.rkt -- generic utilities
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;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the Modified BSD License. You should
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;; have received a copy of the license along with this program. If
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;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
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;; Start date: Sun May 03, 2009 03:09
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#lang racket
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(provide pair->list
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keyword->symbol
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symbol->keyword)
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(define (pair->list pair)
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(let loop ([d pair] [s '()])
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(cond [(null? d) (reverse s)]
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[(symbol? d) (reverse (cons d s))]
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[else (loop (cdr d) (cons (car d) s))])))
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(define keyword->symbol (compose string->symbol keyword->string))
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(define (symbol->keyword sym) (string->keyword (format "~a" sym)))
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