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elpa/geiser-20171010.1610/scheme/racket/geiser/utils.rkt

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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)))