mcs/tests/test-305.cs

   1 // Compiler options: -unsafe
   2
   3 using System;
   4 using System.Runtime.InteropServices;
   5
   6 using S = A.T;
   7
   8 class A
   9 {
  10         [StructLayout (LayoutKind.Sequential)]
  11         struct T { int x; }
  12
  13         public class B
  14         {
  15                 [StructLayout (LayoutKind.Sequential)]
  16                 struct S { int x; int y; }
  17                 S s;
  18
  19                 public B () {
  20                         string error = "";
  21
  22                         unsafe {
  23                                 if (typeof (S *).GetElementType () != typeof (A.B.S))
  24                                         error += " composed cast (pointer),";
  25
  26                                 if (sizeof (S) != sizeof (A.B.S))
  27                                         error += " sizeof,";
  28
  29                                 S *p1 = stackalloc S [1];
  30
  31                                 if ((*p1).GetType () != typeof (A.B.S))
  32                                         error += " local declaration, 'stackalloc' keyword,";
  33
  34                                 fixed (S *p2 = &s) {
  35                                         if ((*p2).GetType () != typeof (A.B.S))
  36                                                 error += " class declaration, 'fixed' statement,";
  37                                 }
  38                         }
  39
  40                         if (error.Length != 0)
  41                                 throw new Exception ("The following couldn't resolve S as A+B+S:" + error);
  42                 }
  43         }
  44
  45         public static void Main()
  46         {
  47                 object o = new A.B();
  48         }
  49 }