mcs/tests/gtest-544.cs

   1 using System;
   2
   3 public abstract class A<T>
   4 {
   5         public abstract G Foo<G> () where G : T;
   6
   7         public virtual G Foo2<G> () where G : T
   8         {
   9                 return default (G);
  10         }
  11 }
  12
  13 public class B : A<int?>
  14 {
  15         public override G Foo<G> ()
  16         {
  17                 return new G ();
  18         }
  19
  20         public override G Foo2<G> ()
  21         {
  22                 return base.Foo2<G> ();
  23         }
  24 }
  25
  26 abstract class A2<T>
  27 {
  28         public abstract void Foo<U> () where U : struct, T;
  29 }
  30
  31 class B2 : A2<System.ValueType>
  32 {
  33         public override void Foo<Y> ()
  34         {
  35         }
  36 }
  37
  38 class Program
  39 {
  40         public static int Main ()
  41         {
  42                 var b = new B ();
  43                 if (b.Foo<int?> () == null)
  44                         return 0;
  45
  46                 b.Foo2<int?> ();
  47
  48                 var b2 = new B2 ();
  49                 b2.Foo<byte> ();
  50
  51                 return 1;
  52         }
  53 }