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;;; Guile Scheme specification
;; Copyright (C) 2001, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
;;;; This library 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.
;;;;
;;;; This library 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 library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;; Code:
(define-module (language scheme spec)
#:use-module (system base compile)
#:use-module (system base language)
#:use-module (language scheme compile-tree-il)
#:use-module (language scheme decompile-tree-il)
#:export (scheme))
;;;
;;; Language definition
;;;
(define-language scheme
#:title "Scheme"
#:reader (lambda (port env)
;; Use the binding of current-reader from the environment.
;; FIXME: Handle `read-options' as well?
((or (and=> (and=> (module-variable env 'current-reader)
variable-ref)
fluid-ref)
read)
port))
#:compilers `((tree-il . ,compile-tree-il))
#:decompilers `((tree-il . ,decompile-tree-il))
#:evaluator (lambda (x module) (primitive-eval x))
#:printer write
#:make-default-environment
(lambda ()
;; Ideally we'd duplicate the whole module hierarchy so that `set!',
;; `fluid-set!', etc. don't have any effect in the current environment.
(let ((m (make-fresh-user-module)))
;; Provide a separate `current-reader' fluid so that
;; compile-time changes to `current-reader' are
;; limited to the current compilation unit.
(module-define! m 'current-reader (make-fluid))
;; Default to `simple-format', as is the case until
;; (ice-9 format) is loaded. This allows
;; compile-time warnings to be emitted when using
;; unsupported options.
(module-set! m 'format simple-format)
m)))