gcc/testsuite/go.test/test/iota.go

   1 // run
   2
   3 // Copyright 2009 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // Test iota.
   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 }