mcs/tests/test-null-operator-13.cs

   1 using System;
   2
   3 static class Crash
   4 {
   5         static X GetFoo ()
   6         {
   7                 return null;
   8         }
   9
  10         static int Main ()
  11         {
  12                 int res = (GetFoo ()?.ToLower ()).ToUpper ();
  13                 if (res != 0)
  14                         return 1;
  15
  16                 return 0;
  17         }
  18 }
  19
  20 class X
  21 {
  22         public Y ToLower ()
  23         {
  24                 throw new ApplicationException ("should not be called");
  25         }
  26 }
  27
  28 class Y
  29 {
  30 }
  31
  32 static class SS
  33 {
  34         public static int ToUpper (this Y y)
  35         {
  36                 if (y != null)
  37                         return 1;
  38
  39                 return 0;
  40         }
  41 }