View difference between Paste ID: <a href="/f1bPvmWd">f1bPvmWd</a> and <a href="/Nen3iu4w">Nen3iu4w</a>

/*
1		/*
2		(empty-frame)
3
4		null
5
6		(update)
7
8		/\
9		/ \
10		/\ \
11		var val /\
12		/ \
13		/\ \
14		/ \ \
15		var val \
16		\
17		null
18
19		(make-env)
20
21		/\
22		/ \
23		empty-frame null
24
25
26		(extend-env)
27
28		/\
29		/ \
30		empty-frame \
31		/\
32		/ \
33		/\ null
34		/ \
35		/\ \
36		var val /\
37		/ \
38		/\ \
39		/ \ \
40		var val \
41		\
42		null
43
44		(define-var)
45
46		/\
47		/ \
48		/ \
49		/\ \
50		/ \ \ current frame
51		/\ \ \
52		var val /\ \ <- defined var and val now
53		/ \ \
54		/\ \ \
55		/ \ \ \
56		var val \ \
57		\ \
58		null \
59		\
60		/\
61		/ \
62		/ \
63		/\ \
64		/ \ \
65		/\ \ \ older frame
66		var val /\ \
67		/ \ \
68		/\ \ \
69		/ \ \ \
70		var val \ \
71		\ \
72		null \
73		\
74		/\
75		/ \
76		/ \
77		/\ \ oldest frame
78		/ \ \
79		/\ \ \
80		var val /\ \
81		/ \ \
82		/\ \ \
83		/ \ \ \
84		var val \ \
85		\ \
86		null \
87		null
88
89
90		structure of closure
91
92		(make-closure)
93
94		/\
95		/ \
96		lambda \
97		/\
98		/ \
99		/\ \
100		/ \ \
101		/ \ \
102		/\ \ \
103		/ \ \ \
104		/\ \ \ \
105		var val /\ \ \
106		/ \ \ \
107		/\ \ \ \
108		/ \ \ \ \
109		var val \ \ \
110		\ \ \
111		null \ \
112		\ \
113		/\ \
114		/ \ \
115		/ \ \
116		/\ \ \
117		/ \ \ \
118		/\ \ \ \
119		var val /\ \ \
120		/ \ \ \
121		/\ \ \ \
122		/ \ \ \ \
123		var val \ \ \
124		\ \ \
125		null \ \
126		\ \
127		/\ \
128		/ \ \
129		/ \ \
130		/\ \ \
131		/ \ \ \
132		/\ \ \ \
133		var val /\ \ \
134		/ \ \ \
135		/\ \ \ \
136		/ \ \ \ \
137		var val \ \ \
138		\ \ \
139		null \ \
140		\ \
141		null \
142		/
143		/
144		/
145		/
146		/
147		/
148		/
149		/
150		/
151		/
152		/
153		/
154		/
155		/
156		/
157		/
158		/\
159		/ \
160		/ \
161		/ \
162		/\ \
163		x \ function-body
164		/\ (+ x (* y z))
165		y \ \
166		/\ \
167		z null \
168		\
169		/\
170		+ \
171		/\
172		x \
173		/\
174		* \
175		/\
176		y \
177		/\
178		z null
179
180		structure of primitive
181
182		(make-primitive)
183
184		/\
185		/ \
186		primitive /\
187		/ \
188		2 /\
189		/ \
190		/ null
191		/
192	-	(cons env (+ (car args) (cadr args))))
192	+
193		(cons env (+ (car args) (cadr args))))
194		*/
195
196		)CM comment 1
197		)CM comment 2
198		)CM comment 3