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