Source file
test/ddd.go
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8
9 package main
10
11 func sum(args ...int) int {
12 s := 0
13 for _, v := range args {
14 s += v
15 }
16 return s
17 }
18
19 func sumC(args ...int) int { return func() int { return sum(args...) }() }
20
21 var sumD = func(args ...int) int { return sum(args...) }
22
23 var sumE = func() func(...int) int { return func(args ...int) int { return sum(args...) } }()
24
25 var sumF = func(args ...int) func() int { return func() int { return sum(args...) } }
26
27 func sumA(args []int) int {
28 s := 0
29 for _, v := range args {
30 s += v
31 }
32 return s
33 }
34
35 func sumB(args []int) int { return sum(args...) }
36
37 func sum2(args ...int) int { return 2 * sum(args...) }
38
39 func sum3(args ...int) int { return 3 * sumA(args) }
40
41 func sum4(args ...int) int { return 4 * sumB(args) }
42
43 func intersum(args ...interface{}) int {
44 s := 0
45 for _, v := range args {
46 s += v.(int)
47 }
48 return s
49 }
50
51 type T []T
52
53 func ln(args ...T) int { return len(args) }
54
55 func ln2(args ...T) int { return 2 * ln(args...) }
56
57 func (*T) Sum(args ...int) int { return sum(args...) }
58
59 type U struct {
60 *T
61 }
62
63 type I interface {
64 Sum(...int) int
65 }
66
67 func main() {
68 if x := sum(1, 2, 3); x != 6 {
69 println("sum 6", x)
70 panic("fail")
71 }
72 if x := sum(); x != 0 {
73 println("sum 0", x)
74 panic("fail")
75 }
76 if x := sum(10); x != 10 {
77 println("sum 10", x)
78 panic("fail")
79 }
80 if x := sum(1, 8); x != 9 {
81 println("sum 9", x)
82 panic("fail")
83 }
84 if x := sumC(4, 5, 6); x != 15 {
85 println("sumC 15", x)
86 panic("fail")
87 }
88 if x := sumD(4, 5, 7); x != 16 {
89 println("sumD 16", x)
90 panic("fail")
91 }
92 if x := sumE(4, 5, 8); x != 17 {
93 println("sumE 17", x)
94 panic("fail")
95 }
96 if x := sumF(4, 5, 9)(); x != 18 {
97 println("sumF 18", x)
98 panic("fail")
99 }
100 if x := sum2(1, 2, 3); x != 2*6 {
101 println("sum 6", x)
102 panic("fail")
103 }
104 if x := sum2(); x != 2*0 {
105 println("sum 0", x)
106 panic("fail")
107 }
108 if x := sum2(10); x != 2*10 {
109 println("sum 10", x)
110 panic("fail")
111 }
112 if x := sum2(1, 8); x != 2*9 {
113 println("sum 9", x)
114 panic("fail")
115 }
116 if x := sum3(1, 2, 3); x != 3*6 {
117 println("sum 6", x)
118 panic("fail")
119 }
120 if x := sum3(); x != 3*0 {
121 println("sum 0", x)
122 panic("fail")
123 }
124 if x := sum3(10); x != 3*10 {
125 println("sum 10", x)
126 panic("fail")
127 }
128 if x := sum3(1, 8); x != 3*9 {
129 println("sum 9", x)
130 panic("fail")
131 }
132 if x := sum4(1, 2, 3); x != 4*6 {
133 println("sum 6", x)
134 panic("fail")
135 }
136 if x := sum4(); x != 4*0 {
137 println("sum 0", x)
138 panic("fail")
139 }
140 if x := sum4(10); x != 4*10 {
141 println("sum 10", x)
142 panic("fail")
143 }
144 if x := sum4(1, 8); x != 4*9 {
145 println("sum 9", x)
146 panic("fail")
147 }
148 if x := intersum(1, 2, 3); x != 6 {
149 println("intersum 6", x)
150 panic("fail")
151 }
152 if x := intersum(); x != 0 {
153 println("intersum 0", x)
154 panic("fail")
155 }
156 if x := intersum(10); x != 10 {
157 println("intersum 10", x)
158 panic("fail")
159 }
160 if x := intersum(1, 8); x != 9 {
161 println("intersum 9", x)
162 panic("fail")
163 }
164
165 if x := ln(nil, nil, nil); x != 3 {
166 println("ln 3", x)
167 panic("fail")
168 }
169 if x := ln([]T{}); x != 1 {
170 println("ln 1", x)
171 panic("fail")
172 }
173 if x := ln2(nil, nil, nil); x != 2*3 {
174 println("ln2 3", x)
175 panic("fail")
176 }
177 if x := ln2([]T{}); x != 2*1 {
178 println("ln2 1", x)
179 panic("fail")
180 }
181 if x := ((*T)(nil)).Sum(1, 3, 5, 7); x != 16 {
182 println("(*T)(nil).Sum", x)
183 panic("fail")
184 }
185 if x := (*T).Sum(nil, 1, 3, 5, 6); x != 15 {
186 println("(*T).Sum", x)
187 panic("fail")
188 }
189 if x := (&U{}).Sum(1, 3, 5, 5); x != 14 {
190 println("(&U{}).Sum", x)
191 panic("fail")
192 }
193 var u U
194 if x := u.Sum(1, 3, 5, 4); x != 13 {
195 println("u.Sum", x)
196 panic("fail")
197 }
198 if x := (&u).Sum(1, 3, 5, 3); x != 12 {
199 println("(&u).Sum", x)
200 panic("fail")
201 }
202 var i interface {
203 Sum(...int) int
204 } = &u
205 if x := i.Sum(2, 3, 5, 7); x != 17 {
206 println("i(=&u).Sum", x)
207 panic("fail")
208 }
209 i = u
210 if x := i.Sum(2, 3, 5, 6); x != 16 {
211 println("i(=u).Sum", x)
212 panic("fail")
213 }
214 var s struct {
215 I
216 }
217 s.I = &u
218 if x := s.Sum(2, 3, 5, 8); x != 18 {
219 println("s{&u}.Sum", x)
220 panic("fail")
221 }
222 if x := (*U).Sum(&U{}, 1, 3, 5, 2); x != 11 {
223 println("(*U).Sum", x)
224 panic("fail")
225 }
226 if x := U.Sum(U{}, 1, 3, 5, 1); x != 10 {
227 println("U.Sum", x)
228 panic("fail")
229 }
230 }
231
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