From 133569ad84dcff2a80c9c0efea2db0a7fd3a4604 Mon Sep 17 00:00:00 2001 From: David Thompson Date: Sat, 17 Aug 2013 22:59:47 -0400 Subject: Move define-enumeration into util module. --- 2d/wrappers/util.scm | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 2d/wrappers/util.scm (limited to '2d/wrappers/util.scm') diff --git a/2d/wrappers/util.scm b/2d/wrappers/util.scm new file mode 100644 index 0000000..267cbf5 --- /dev/null +++ b/2d/wrappers/util.scm @@ -0,0 +1,40 @@ +;;; guile-2d +;;; Copyright (C) 2013 David Thompson +;;; +;;; Guile-2d is free software: you can redistribute it and/or modify it +;;; under the terms of the GNU Lesser General Public License as +;;; published by the Free Software Foundation, either version 3 of the +;;; License, or (at your option) any later version. +;;; +;;; Guile-2d is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +;;; Lesser General Public License for more details. +;;; +;;; You should have received a copy of the GNU Lesser General Public +;;; License along with this program. If not, see +;;; . + +;;; Commentary: +;; +;; Wrapper helper procedures. +;; +;;; Code: + +(define-module (2d wrappers util) + #:export (define-enumeration)) + +;; Borrowed from guile-figl +(define-syntax-rule (define-enumeration enumerator (name value) ...) + (define-syntax enumerator + (lambda (x) + (syntax-case x () + ((_) + #''(name ...)) + ((_ enum) (number? (syntax->datum #'enum)) + #'enum) + ((_ enum) + (or (assq-ref '((name . value) ...) + (syntax->datum #'enum)) + (syntax-violation 'enumerator "invalid enumerated value" + #'enum))))))) -- cgit v1.2.3