Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-780.cs

@@ -0,0 +1,107 @@
+using System;
+
+namespace MonoVirtuals
+{
+	class X { }
+	class Y : X { }
+
+	class A
+	{
+		public virtual int f (X o)
+		{
+			System.Console.WriteLine ("In A for X");
+			return 5;
+		}
+
+		public virtual int f (Y o)
+		{
+			System.Console.WriteLine ("In A for Y");
+			return 10;
+		}
+
+		public virtual int this[X o]
+		{
+			get
+			{
+				System.Console.WriteLine ("In A for X");
+				return 5;
+			}
+		}
+
+		public virtual int this[Y o]
+		{
+			get
+			{
+				System.Console.WriteLine ("In A for Y");
+				return 10;
+			}
+		}
+	}
+
+	class B : A
+	{
+		public override int f (X o)
+		{
+			base.f (o);
+			throw new ApplicationException ("should not be called");
+		}
+
+		public override int this[X o]
+		{
+			get
+			{
+				base.f (o);
+				throw new ApplicationException ("should not be called");
+			}
+		}
+	}
+
+	class C : B
+	{
+		public override int f (X o)
+		{
+			System.Console.WriteLine ("In C for X");
+			return base.f (o);
+		}
+
+		public override int f (Y o)
+		{
+			System.Console.WriteLine ("In C for Y");
+			return base.f (o);
+		}
+
+		public override int this[X o]
+		{
+			get
+			{
+				System.Console.WriteLine ("In C for X");
+				return base.f (o);
+			}
+		}
+
+		public override int this[Y o]
+		{
+			get
+			{
+				System.Console.WriteLine ("In C for Y");
+				return base.f (o);
+			}
+		}
+	}
+
+	class MainClass
+	{
+		public static int Main ()
+		{
+			var o = new Y ();
+			var c = new C ();
+			if (c.f (o) != 10)
+				return 1;
+
+			if (c[o] != 10)
+				return 2;
+
+			return 0;
+		}
+	}
+}