Source file
test/iota.go
1
2
3
4
5
6
7
8
9 package main
10
11 func assert(cond bool, msg string) {
12 if !cond {
13 print("assertion fail: ", msg, "\n")
14 panic(1)
15 }
16 }
17
18 const (
19 x int = iota
20 y = iota
21 z = 1 << iota
22 f float32 = 2 * iota
23 g float32 = 4.5 * float32(iota)
24 )
25
26 const (
27 X = 0
28 Y
29 Z
30 )
31
32 const (
33 A = 1 << iota
34 B
35 C
36 D
37 E = iota * iota
38 F
39 G
40 )
41
42 const (
43 a = 1
44 b = iota << a
45 c = iota << b
46 d
47 )
48
49 const (
50 i = (a << iota) + (b * iota)
51 j
52 k
53 l
54 )
55
56 const (
57 m = iota == 0
58 n
59 )
60
61 const (
62 p = float32(iota)
63 q
64 r
65 )
66
67 const (
68 s = string(iota + 'a')
69 t
70 )
71
72 const (
73 abit, amask = 1 << iota, 1<<iota - 1
74 bbit, bmask = 1 << iota, 1<<iota - 1
75 cbit, cmask = 1 << iota, 1<<iota - 1
76 )
77
78 func main() {
79 assert(x == 0, "x")
80 assert(y == 1, "y")
81 assert(z == 4, "z")
82 assert(f == 6.0, "f")
83 assert(g == 18.0, "g")
84
85 assert(X == 0, "X")
86 assert(Y == 0, "Y")
87 assert(Z == 0, "Z")
88
89 assert(A == 1, "A")
90 assert(B == 2, "B")
91 assert(C == 4, "C")
92 assert(D == 8, "D")
93 assert(E == 16, "E")
94 assert(F == 25, "F")
95
96 assert(a == 1, "a")
97 assert(b == 2, "b")
98 assert(c == 8, "c")
99 assert(d == 12, "d")
100
101 assert(i == 1, "i")
102 assert(j == 4, "j")
103 assert(k == 8, "k")
104 assert(l == 14, "l")
105
106 assert(m, "m")
107 assert(!n, "n")
108
109 assert(p == 0.0, "p")
110 assert(q == 1.0, "q")
111 assert(r == 2.0, "r")
112
113 assert(s == "a", "s")
114 assert(t == "b", "t")
115
116 assert(abit == 1, "abit")
117 assert(amask == 0, "amask")
118 assert(bbit == 2, "bbit")
119 assert(bmask == 1, "bmask")
120 assert(cbit == 4, "cbit")
121 assert(cmask == 3, "cmask")
122 }
123
View as plain text