Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-optional-17.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+struct BI
+{
+	public static implicit operator BI (int i)
+	{
+		return new BI ();
+	}
+}
+
+class C
+{
+	public static void M ([DefaultParameterValue (1 + 3)]BI step)
+	{
+	}
+	
+	public static void M2 ([DefaultParameterValue (1)] object o)
+	{
+	}
+
+	public static int Main ()
+	{
+		var m = typeof (C).GetMethod ("M");
+		var p = m.GetParameters ()[0];
+
+		Console.WriteLine (p.Attributes);
+		if (p.Attributes != ParameterAttributes.HasDefault)
+			return 2;
+
+		if ((int) p.DefaultValue != 4)
+			return 1;
+
+		Console.WriteLine (p.DefaultValue);
+		return 0;
+	}
+}