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52 lines
1.5 KiB
Scheme
52 lines
1.5 KiB
Scheme
;;; Multi-language support
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;; Copyright (C) 2001 Free Software Foundation, Inc.
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Code:
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(define-module (system base language)
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:use-module (oop goops)
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:use-syntax (system base syntax)
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:export (define-language lookup-language))
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;;;
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;;; Language class
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;;;
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(define-vm-class <language> ()
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name title version environment
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reader printer read-file
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(expander (lambda (x e) x))
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(translator (lambda (x e) x))
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(evaluator #f)
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)
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(define-method (write (lang <language>) port)
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(display "#<language " port)
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(display lang.name port)
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(display ">"))
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(define-macro (define-language name . spec)
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`(define ,name (,make ,<language> :name ',name ,@spec)))
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(define (lookup-language name)
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(let ((m (resolve-module `(language ,name spec))))
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(if (module-bound? m name)
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(module-ref m name)
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(error "No such language:" name))))
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