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;;; 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))))
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