mcs/tests/test-740.cs

   1 // Compiler options: -unsafe
   2
   3 using System;
   4 using System.Runtime.InteropServices;
   5
   6 class FixedTest
   7 {
   8         [StructLayout (LayoutKind.Explicit)]
   9         public unsafe struct Value
  10         {
  11                 [FieldOffset (0)]
  12                 public void* p;
  13                 [FieldOffset (0)]
  14                 public double n;
  15                 [FieldOffset (0)]
  16                 public long i;
  17                 [FieldOffset (0)]
  18                 public bool b;
  19         }
  20
  21         [StructLayout (LayoutKind.Sequential, Pack = 4)]
  22         public unsafe struct TValue
  23         {
  24                 public Value value;
  25
  26                 public TValue (long x)
  27                 {
  28                         value = new Value ();
  29                         value.i = x;
  30                 }
  31
  32                 public override string ToString ()
  33                 {
  34                         return value.i.ToString ();
  35                 }
  36         }
  37
  38         unsafe public static int Main ()
  39         {
  40                 TValue[] values = new TValue[10];
  41                 values[0] = new TValue (0L);
  42                 values[1] = new TValue (1000L);
  43                 values[2] = new TValue (1L);
  44                 Console.WriteLine ("values: {0} {1} {2}", values[0], values[1], values[2]);
  45                 fixed (TValue* vals = values) {
  46                         Console.WriteLine ("fixed: {0} {1} {2}", vals[0], vals[1], vals[2]);
  47                         if (vals[0].ToString () != "0")
  48                                 return 1;
  49
  50                         if (vals[1].ToString() != "1000")
  51                                 return 2;
  52
  53                         if (vals[2].ToString() != "1")
  54                                 return 3;
  55                 }
  56
  57                 Console.WriteLine ("ok");
  58                 return 0;
  59         }
  60 }