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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
;;;; Copyright (C) 2000-2001,2004,2006,2008-2010,2019
;;;; 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
;;;;
;;;; Safe subset of R5RS bindings
(define-module (ice-9 safe-r5rs)
#:pure
#:use-module ((guile) #:hide (case cond syntax-rules _ => else ...))
#:use-module (ice-9 ports)
#:use-module ((guile) #:select ((_ . ^_)
(... . ^...)))
#:re-export (quote
quasiquote
unquote unquote-splicing
define-syntax let-syntax letrec-syntax
define lambda let let* letrec begin do
if set! delay and or
eqv? eq? equal?
number? complex? real? rational? integer?
exact? inexact?
= < > <= >=
zero? positive? negative? odd? even?
max min
+ * - /
abs
quotient remainder modulo
gcd lcm
numerator denominator
rationalize
floor ceiling truncate round
exp log sin cos tan asin acos atan
sqrt
expt
make-rectangular make-polar real-part imag-part magnitude angle
exact->inexact inexact->exact
number->string string->number
boolean?
not
pair?
cons car cdr
set-car! set-cdr!
caar cadr cdar cddr
caaar caadr cadar caddr cdaar cdadr cddar cdddr
caaaar caaadr caadar caaddr cadaar cadadr caddar cadddr
cdaaar cdaadr cdadar cdaddr cddaar cddadr cdddar cddddr
null?
list?
list
length
append
reverse
list-tail list-ref
memq memv member
assq assv assoc
symbol?
symbol->string string->symbol
char?
char=? char<? char>? char<=? char>=?
char-ci=? char-ci<? char-ci>? char-ci<=? char-ci>=?
char-alphabetic? char-numeric? char-whitespace?
char-upper-case? char-lower-case?
char->integer integer->char
char-upcase
char-downcase
string?
make-string
string
string-length
string-ref string-set!
string=? string-ci=?
string<? string>? string<=? string>=?
string-ci<? string-ci>? string-ci<=? string-ci>=?
substring
string-length
string-append
string->list list->string
string-copy string-fill!
vector?
make-vector
vector
vector-length
vector-ref vector-set!
vector->list list->vector
vector-fill!
procedure?
apply
map
for-each
force
call-with-current-continuation
values
call-with-values
dynamic-wind
eval
input-port? output-port?
current-input-port current-output-port
read
read-char
peek-char
eof-object?
char-ready?
write
display
newline
write-char
;;transcript-on
;;transcript-off
)
#:export (null-environment
syntax-rules cond case))
;;; These definitions of `cond', `case', and `syntax-rules' differ from
;;; the ones in Guile in that they expect their auxiliary syntax (`_',
;;; `...', `else', and `=>') to be unbound. They also don't support
;;; some extensions from Guile (e.g. `=>' in `case'.).
(define-syntax syntax-rules
(lambda (x)
(define (replace-underscores pattern)
(syntax-case pattern (_)
(_ #'^_)
((x . y)
(with-syntax ((x (replace-underscores #'x))
(y (replace-underscores #'y)))
#'(x . y)))
((x . y)
(with-syntax ((x (replace-underscores #'x))
(y (replace-underscores #'y)))
#'(x . y)))
(#(x ^...)
(with-syntax (((x ^...) (map replace-underscores #'(x ^...))))
#'#(x ^...)))
(x #'x)))
(syntax-case x ()
((^_ dots (k ^...) . clauses)
(identifier? #'dots)
#'(with-ellipsis dots (syntax-rules (k ^...) . clauses)))
((^_ (k ^...) ((keyword . pattern) template) ^...)
(with-syntax (((pattern ^...) (replace-underscores #'(pattern ^...))))
#`(lambda (x)
(syntax-case x (k ^...)
((dummy . pattern) #'template)
^...)))))))
(define-syntax case
(lambda (stx)
(let lp ((stx stx))
(syntax-case stx (else)
(("case" x)
#'(if #f #f))
(("case" x ((y ^...) expr ^...) clause ^...)
#`(if (memv x '(y ^...))
(begin expr ^...)
#,(lp #'("case" x clause ^...))))
(("case" x (else expr ^...))
#'(begin expr ^...))
(("case" x clause . ^_)
(syntax-violation 'case "bad 'case' clause" #'clause))
((^_ x clause clause* ^...)
#`(let ((t x))
#,(lp #'("case" t clause clause* ^...))))))))
(define-syntax cond
(lambda (stx)
(let lp ((stx stx))
(syntax-case stx (else =>)
(("cond")
#'(if #f #f))
(("cond" (else expr ^...))
#'(begin expr ^...))
(("cond" (test => expr) clause ^...)
#`(let ((t test))
(if t
(expr t)
#,(lp #'("cond" clause ^...)))))
(("cond" (test) clause ^...)
#`(or test #,(lp #'("cond" clause ^...))))
(("cond" (test expr ^...) clause ^...)
#`(if test
(begin expr ^...)
#,(lp #'("cond" clause ^...))))
(("cond" clause . ^_)
(syntax-violation 'cond "bad 'cond' clause" #'clause))
((^_ clause clause* ^...)
(lp #'("cond" clause clause* ^...)))))))
(define (null-environment n)
(unless (eqv? n 5)
(scm-error 'misc-error 'null-environment
"~A is not a valid version" (list n) '()))
;; Note that we need to create a *fresh* interface
(let ((interface (make-module)))
(set-module-kind! interface 'interface)
(define bindings
'(define quote lambda if set! cond case and or let let* letrec
begin do delay quasiquote unquote
define-syntax let-syntax letrec-syntax syntax-rules))
(module-use! interface
(resolve-interface '(ice-9 safe-r5rs) #:select bindings))
interface))
|
