mcs/tests/test-decl-expr-01.cs

   1 // Compiler options: -langversion:experimental
   2 using System;
   3
   4 class DeclarationExpression
   5 {
   6         public static int Main ()
   7         {
   8                 Out (out int o);
   9                 if (o != 3)
  10                         return 1;
  11
  12                 if (Out (out int o1)) {
  13                         if (o1 != 3)
  14                                 return 2;
  15                 }
  16
  17                 Out (out int o2 = 2);
  18                 if (o2 != 3)
  19                         return 3;
  20
  21                 Out (out var o3);
  22                 if (o3 != 3)
  23                         return 4;
  24
  25                 Ref (ref int r = 2);
  26                 if (r != 7)
  27                         return 5;
  28
  29                 Ref (ref ((var r2 = 3)));
  30                 if (r2 != 8)
  31                         return 6;
  32
  33 //              Out2 (str: "b", v: out var o5);
  34 //              if (o5 != 9)
  35 //                      return 7;
  36
  37                 Out3 (out var o6 = 9m);
  38                 if (o6.GetType () != typeof (decimal))
  39                         return 8;
  40
  41                 Console.WriteLine ("ok");
  42                 return 0;
  43         }
  44
  45         static bool Out (out int value)
  46         {
  47                 value = 3;
  48                 return true;
  49         }
  50
  51         static bool Out2 (out int v, string str)
  52         {
  53                 v = 9;
  54                 return true;
  55         }
  56
  57         static void Out3<T> (out T t)
  58         {
  59                 t = default (T);
  60         }
  61
  62         static void Ref (ref int arg)
  63         {
  64                 arg += 5;
  65         }
  66 }