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;;; skribe.scm -- A reader for the Skribe syntax.
;;;
;;; Copyright 2005 Ludovic Court�s <ludovic.courtes@laas.fr>
;;;
;;;
;;; 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 of the License, 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; if not, write to the Free Software
;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
;;; USA.
(define-module (skribilo reader skribe)
:use-module (skribilo reader)
:use-module (ice-9 optargs)
;; the Scheme reader composition framework
:use-module ((system reader) #:renamer (symbol-prefix-proc 'r:))
:export (reader-specification
make-skribe-reader))
;;; Author: Ludovic Court�s
;;;
;;; Commentary:
;;;
;;; A reader for the Skribe syntax, i.e. roughly R5RS Scheme plus DSSSL-style
;;; keywords and sk-exps (expressions introduced using a square bracket).
;;;
;;; Code:
(define* (make-skribe-reader #:optional (version "1.2d"))
"Return a Skribe reader (a procedure) suitable for version @var{version} of
the Skribe syntax."
(if (string> version "1.2d")
(error "make-skribe-reader: unsupported version" version)
*skribe-reader*))
(define (%make-skribe-reader)
(let* ((dsssl-keyword-reader ;; keywords � la `#!key'
(r:make-token-reader #\!
(r:token-reader-procedure
(r:standard-token-reader 'keyword))))
(sharp-reader (r:make-reader (cons dsssl-keyword-reader
(map r:standard-token-reader
'(character srfi-4
number+radix
boolean))))))
(r:make-reader (cons (r:make-token-reader #\# sharp-reader)
(map r:standard-token-reader
`(whitespace
sexp string number
symbol-lower-case
symbol-upper-case
symbol-misc-chars
quote-quasiquote-unquote
semicolon-comment
keyword ;; keywords � la `:key'
skribe-exp))))))
;; We actually cache an instance here.
(define *skribe-reader* (%make-skribe-reader))
;;; The reader specification.
(define-reader skribe "1.2d" make-skribe-reader)
;;; skribe.scm ends here
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