Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-optional-11-lib.cs

@@ -0,0 +1,40 @@
+// Compiler options: -t:library
+
+using System;
+using System.Runtime.InteropServices;
+
+public struct S
+{
+}
+
+public class Lib
+{
+	public static int TestA ([Optional][DefaultParameterValue (1)] int u)
+	{
+		return u;
+	}
+
+	public static T TestB<T> (T a, [Optional] T u)
+	{
+		return u;
+	}
+	
+	public static object TestC ([Optional] object a)
+	{
+		return a;
+	}
+	
+	public static object TestC2 (object a = null)
+	{
+		return a;
+	}
+
+	public static int TestD ([Optional] int a, int i)
+	{
+		return a;
+	}
+
+	public static void TestS (S s = default (S))
+	{
+	}
+}