blob: cebb5d19e5a1e57fc5db1eaae90633919fa95844 (
about) (
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
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
|
(define-module (language python for)
#:use-module (language python yield)
#:use-module (oop pf-objects)
#:use-module (language python exceptions)
#:use-module (language python def)
#:use-module (oop goops)
#:use-module (ice-9 control)
#:use-module (language python persist)
#:export (for break next wrap-in))
(define-syntax-rule (aif it p x y) (let ((it p)) (if it x y)))
(eval-when (compile eval load)
(define (generate-temporaries2 x)
(map (lambda (x) (generate-temporaries x)) x)))
(define-syntax-parameter break (lambda (x) #f))
(define-syntax for
(syntax-rules (:)
((for ((x ... : E) ...) ((c n) ...) code ... #:final fin)
(for-work #f ((x ... : E) ...) ((c n) ...) (code ...) fin values))
((for ((x ... : E) ...) ((c n) ...) code ... #:finally fin)
(for-work #f ((x ... : E) ...) ((c n) ...) (code ...) fin values))
((for ((x ... : E) ...) ((c n) ...) code ... #:else fin)
(for-work #f ((x ... : E) ...) ((c n) ...) (code ...) (values)
(lambda () fin)))
((for lp ((x ... : E) ...) ((c n) ...) code ... #:final fin)
(for-work lp ((x ... : E) ...) ((c n) ...) (code ...) fin values))
((for lp ((x ... : E) ...) ((c n) ...) code ... #:finally fin)
(for-work lp ((x ... : E) ...) ((c n) ...) (code ...) fin values))
((for lp ((x ... : E) ...) ((c n) ...) code ... #:else fin)
(for-work lp ((x ... : E) ...) ((c n) ...) (code ...) (values)
(lambda () fin)))
((for ((x ... : E) ...) ((c n) ...) code ...)
(for-work #f ((x ... : E) ...) ((c n) ...) (code ...) (values) values))
((for lp ((x ... : E) ...) ((c n) ...) code ...)
(for-work lp ((x ... : E) ...) ((c n) ...) (code ...) (values) values))))
(define-syntax for-work
(lambda (z)
(define (wrap-continue lp code)
(if (syntax->datum lp)
#`(lambda () (let/ec #,lp #,@code))
#`(lambda () #,@code)))
(syntax-case z ()
((for lp ((x ... : E) ...) ((c n) ...) (code ...) fin er)
(with-syntax (((It ...) (generate-temporaries #'(E ...)))
((cc ...) (generate-temporaries #'(c ...)))
(((x1 ...) ...) (generate-temporaries2 #'((x ...) ...)))
(((x2 ...) ...) (generate-temporaries2 #'((x ...) ...)))
((N ...) (map length #'((x ...) ...)))
(M (length #'(c ...)))
(else- (datum->syntax #'for 'else-))
(llp (if (syntax->datum #'lp) #'lp #'lpu)))
#`(let/ec lp-break0
(let ((It (wrap-in E)) ...
(c n ) ...
(x 'None ) ... ...
(x1 #f ) ... ...)
(let* ((else- er )
(lp-break (lambda q (else-) (apply lp-break0 q))))
(syntax-parameterize ((break (lambda (z)
(syntax-case z ()
((_ . l)
#'(lp-break . l))
(_ #'lp-break)))))
(catch StopIteration
(lambda ()
(let llp ((cc c) ...)
(set! c cc) ...
(call-with-values
(lambda () (next It))
(let ((f
(lambda (x2 ... . ll)
(set! x1 x2) ...)))
(if (> N 1)
(case-lambda
((q)
(if (pair? q)
(if (pair? (cdr q))
(apply f q)
(apply f (car q) (cdr q)))
(py-apply f (* q))))
(q
(apply f q)))
(lambda (x2 ... . ll)
(set! x1 x2) ...))))
...
(set! x x1)
... ...
(call-with-values
#,(wrap-continue
#'lp
#'((let ((x x) ... ...) code ...)))
(lambda (cc ... . q) (llp cc ...)))))
(lambda q (else-) fin)))))))))))
(define-class <scm-list> () l)
(define-class <scm-string> () s i)
(name-object <scm-list>)
(name-object <scm-string>)
(cpit <scm-list> (o (lambda (o l) (slot-set! o 'l l))
(list (slot-ref o 'l))))
(cpit <scm-string> (o (lambda (o s i)
(slot-set! o 's s)
(slot-set! o 'i i))
(list
(slot-ref o 's)
(slot-ref o 'i))))
(define-method (next x)
(throw StopIteration))
(define-method (next (l <scm-list>))
(let ((ll (slot-ref l 'l)))
(if (pair? ll)
(begin
(slot-set! l 'l (cdr ll))
(car ll))
(throw StopIteration))))
(define-method (next (l <scm-string>))
(let ((s (slot-ref l 's))
(i (slot-ref l 'i)))
(if (= i (string-length s))
(throw StopIteration)
(begin
(slot-set! l 'i (+ i 1))
(string-ref s i)))))
(define-method (next (l <yield>))
(let ((k (slot-ref l 'k))
(s (slot-ref l 's)))
(if k
(k (lambda () 'None))
(s))))
(define-method (wrap-in (o <yield>))
o)
(define-method (wrap-in (o <p>))
(aif it (ref o '__iter__)
(let ((x (it)))
(pk 'wrap-in o x)
(cond
((pair? x) (wrap-in x))
(else x)))
(next-method)))
(define-method (next (l <p>))
((ref l '__next__)))
(define-method (wrap-in x)
(cond
((or (null? x) (pair? x))
(let ((o (make <scm-list>)))
(slot-set! o 'l x)
o))
((string? x)
(let ((o (make <scm-string>)))
(slot-set! o 's x)
(slot-set! o 'i 0)
o))
(else
x)))
(set! (@@ (oop pf-objects) hashforeach)
(lambda (f d)
(for ((k v : d)) () (f k v))))
|
