1 files changed, 48 insertions, 0 deletions
diff --git a/module/system/base/language.scm b/module/system/base/language.scm
new file mode 100644
index 000000000..47c408f67
--- /dev/null
+++ b/module/system/base/language.scm
@@ -0,0 +1,48 @@
+;;; Multi-language support
+
+;; Copyright (C) 2001 Free Software Foundation, Inc.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+;; 
+;; This program 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 General Public License for more details.
+;; 
+;; You should have received a copy of the GNU General Public License
+;; along with this program; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(define-module (system base language)
+  :use-syntax (system base syntax)
+  :export (define-language lookup-language make-language
+           language-name language-title language-version language-reader
+           language-printer language-read-file language-expander
+           language-translator language-evaluator language-environment))
+
+
+;;;
+;;; Language class
+;;;
+
+(define-record (<language> name title version reader printer read-file
+			   (expander (lambda (x e) x))
+			   (translator (lambda (x e) x))
+			   (evaluator #f)
+			   (environment #f)
+			   ))
+
+(define-macro (define-language name . spec)
+  `(define ,name (make-language :name ',name ,@spec)))
+
+(define (lookup-language name)
+  (let ((m (resolve-module `(language ,name spec))))
+    (if (module-bound? m name)
+	(module-ref m name)
+	(error "no such language" name))))