Racket support (PLT 5 needed).

1 files changed, 27 insertions, 0 deletions

diff --git a/scheme/plt/geiser/utils.rkt b/scheme/plt/geiser/utils.rkt
new file mode 100644
index 0000000..ff8e695
--- /dev/null
+++ b/scheme/plt/geiser/utils.rkt
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+;;; utils.ss -- generic utilities
+
+;; Copyright (C) 2009 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 scheme
+
+(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)))
+
+;;; utils.ss ends here