blob: 410ef01506c969c5b46b73ee9e55975b4ed7514e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
;;; 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:
;;; Note: We need guile-reader 0.2 at least.
(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 &sharp-reader
;; The reader for what comes after a `#' character.
(let* ((dsssl-keyword-reader ;; keywords � la `#!key'
(r:make-token-reader #\!
(r:token-reader-procedure
(r:standard-token-reader 'keyword)))))
(r:make-reader (cons dsssl-keyword-reader
(map r:standard-token-reader
'(character srfi-4 vector
number+radix boolean
srfi30-block-comment
srfi62-sexp-comment)))
#f ;; use default fault handler
'reader/record-positions)))
(define (%make-skribe-reader)
(let ((colon-keywords ;; keywords � la `:key' fashion
(r:make-token-reader #\:
(r:token-reader-procedure
(r:standard-token-reader 'keyword))))
(square-bracket-free-symbol-misc-chars
(let* ((tr (r:standard-token-reader 'guile-symbol-misc-chars))
(tr-spec (r:token-reader-specification tr))
(tr-proc (r:token-reader-procedure tr)))
(r:make-token-reader (filter (lambda (chr)
(not (or (eq? chr #\[)
(eq? chr #\]))))
tr-spec)
tr-proc))))
(r:make-reader (cons* (r:make-token-reader #\# &sharp-reader)
colon-keywords
square-bracket-free-symbol-misc-chars
(map r:standard-token-reader
`(whitespace
sexp string guile-number
guile-symbol-lower-case
guile-symbol-upper-case
quote-quasiquote-unquote
semicolon-comment
skribe-exp)))
#f ;; use the default fault handler
'reader/record-positions
)))
;; 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
|
