-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathshift-reset.scm
170 lines (139 loc) · 4.35 KB
/
shift-reset.scm
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
(load "prereqs.scm")
(display "A similar interpreter for a language with shift and reset")
(newline)
(define c+
(lambda (v)
(lambda (k)
(k (lambda (w)
(lambda (k)
(k (+ v w))))))))
(define c*
(lambda (v)
(lambda (k)
(k (lambda (w)
(lambda (k)
(k (* v w))))))))
(define cadd1
(lambda (v)
(lambda (k)
(k (add1 v)))))
(define csub1
(lambda (v)
(lambda (k)
(k (sub1 v)))))
(define init-env
(lambda (y)
(if ((ceq? '*) y) c*
(if ((ceq? '+) y) c+
(if ((ceq? 'add1) y) cadd1
(if ((ceq? 'sub1) y) csub1
error))))))
(define empty-g
(lambda (v) v))
(define empty-k
(lambda (x)
(lambda (g)
(g x))))
(define shift-fun
(lambda (k)
(lambda (a)
(lambda (k^)
(lambda (g^)
((k a)
(lambda (w)
((k^ w) g^))))))))
(define value-of
(lambda (exp)
(lambda (env)
(pmatch exp
(,exp (guard (number? exp)) (lambda (k) (k exp)))
(,exp (guard (symbol? exp))
(let ((sval (env exp)))
(lambda (k) (k sval))))
((lambda (,x) ,body)
(let ((sbody (value-of body)))
(let ((sfun (lambda (a)
(sbody
(lambda (y)
(if ((ceq? x) y) a (env y)))))))
(lambda (k) (k sfun)))))
((shift ,rator)
(let ((srator ((value-of rator) env)))
(lambda (k)
(srator
(lambda (p)
((p (shift-fun k)) empty-k))))))
((reset ,exp)
(let ((sexp ((value-of exp) env)))
(lambda (k)
(lambda (g)
((sexp empty-k)
(lambda (v) ((k v) g)))))))
((,rator ,rand)
(let ((srator ((value-of rator) env)))
(let ((srand ((value-of rand) env)))
(lambda (k)
(srator (lambda (p)
(srand (lambda (a)
((p a) k)))))))))))))
(define eval-exp
(lambda (exp)
((((value-of exp) init-env) empty-k) empty-g)))
;;;;;;;;;;;;;;;;; Test Suite
(test-check "lambda-calc"
(eval-exp '((lambda (x) ((lambda (y) x) 6)) 5))
5)
(test-check "worse lambda calc"
(eval-exp '(((lambda (x) (lambda (y) x)) 5) 6))
5)
(test-check "test1"
(eval-exp '(add1 (reset (add1 (shift (lambda (k) (add1 (k (add1 (k 1))))))))))
6)
(test-check "test2"
(eval-exp '(add1 (reset (add1 (shift (lambda (k) (add1 (k 1))))))))
4)
(test-check "test3"
(eval-exp '(add1 (reset (add1 (shift (lambda (k) (k (k (k (k (k (k 1))))))))))))
8)
(test-check "test4"
(eval-exp '(add1 (reset ((+ 5) (shift (lambda (k) (k (k (k (k (k (k 1))))))))))))
32)
(test-check "s&r"
(eval-exp '(reset ((+ (shift (lambda (k) ((+ 10) (k 100))))) (shift (lambda (k^) 1)))))
11)
(test-check "working test1"
(eval-exp '(reset ((+ (shift (lambda (k) ((+ 10) (k 100))))) (shift (lambda (k^) 1)))))
11)
(test-check "working-test2"
(eval-exp '(add1 (reset (add1 (shift (lambda (k) (k (add1 (k (k 5))))))))))
10)
(test-check "working test3"
(eval-exp '(reset (add1 (shift (lambda (k) (k 5))))))
6)
(test-check "other s&r"
(eval-exp '(reset (add1 ((+ (shift (lambda (k) ((+ 10) (k 100))))) (shift (lambda (k^) (add1 1)))))))
12)
(test-check "nested resets"
(eval-exp '(reset (add1 (shift (lambda (k) (add1 (reset (shift (lambda (k2) (k 5))))))))))
7)
(test-check "nested resets"
(eval-exp '(reset (add1 (add1 (shift (lambda (k) (add1 (reset (shift (lambda (k2) (k 5)))))))))))
8)
(test-check "nested resets"
(eval-exp '(reset (add1 (add1 (shift (lambda (k) (reset (add1 (shift (lambda (k2) (k 5)))))))))))
7)
(test-check "nested resets"
(eval-exp '(reset (add1 (add1 (shift (lambda (k) (reset (add1 (shift (lambda (k2) (k2 (k 5))))))))))))
8)
(test-check "nested resets"
(eval-exp '(reset (add1 (add1 (shift (lambda (k) (reset (add1 (shift (lambda (k2) (k (k2 5))))))))))))
8)
(test-check "nested resets"
(eval-exp '(reset (add1 (add1 (shift (lambda (k) (reset (k (add1 (shift (lambda (k2) (k2 5)) ))))))))))
8)
(test-check "nested resets"
(eval-exp '(reset (add1 (add1 (shift (lambda (k) (reset (k (add1 (shift (lambda (k2) (k2 (k2 5)))))))))))))
11)
(test-check "plus and times"
(eval-exp '((* 10) (reset ((* 20) (shift (lambda (k) ((+ 5) (k ((+ 2) 3)))))))))
1050)