Commit | Line | Data |
---|---|---|
17e90c5e KN |
1 | ;;; Multi-language support |
2 | ||
3 | ;; Copyright (C) 2001 Free Software Foundation, Inc. | |
4 | ||
5 | ;; This program is free software; you can redistribute it and/or modify | |
6 | ;; it under the terms of the GNU General Public License as published by | |
7 | ;; the Free Software Foundation; either version 2, or (at your option) | |
8 | ;; any later version. | |
9 | ;; | |
10 | ;; This program is distributed in the hope that it will be useful, | |
11 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | ;; GNU General Public License for more details. | |
14 | ;; | |
15 | ;; You should have received a copy of the GNU General Public License | |
16 | ;; along with this program; see the file COPYING. If not, write to | |
17 | ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | ;; Boston, MA 02111-1307, USA. | |
19 | ||
20 | ;;; Code: | |
21 | ||
22 | (define-module (system base language) | |
17e90c5e | 23 | :use-syntax (system base syntax) |
8f5cfc81 | 24 | :export (define-language lookup-language)) |
17e90c5e KN |
25 | |
26 | \f | |
27 | ;;; | |
28 | ;;; Language class | |
29 | ;;; | |
30 | ||
ac99cb0c KN |
31 | (define-record (<language> name title version reader printer read-file |
32 | (expander (lambda (x e) x)) | |
33 | (translator (lambda (x e) x)) | |
34 | (evaluator #f) | |
35 | (environment #f) | |
36 | )) | |
17e90c5e KN |
37 | |
38 | (define-macro (define-language name . spec) | |
ac99cb0c | 39 | `(define ,name (,<language> :name ',name ,@spec))) |
17e90c5e KN |
40 | |
41 | (define (lookup-language name) | |
42 | (let ((m (resolve-module `(language ,name spec)))) | |
43 | (if (module-bound? m name) | |
44 | (module-ref m name) | |
884d46de | 45 | (error "no such language" name)))) |