Imported Upstream version 5.8.0.22

Former-commit-id: df344e34b07851d296efb3e6604c8db42b6f7aa3

mcs/tests/test-tuple-02.cs

@@ -0,0 +1,38 @@
+using System;
+
+class TupleConversions
+{
+	public static void Main ()
+	{
+		object oarg = 4;
+		(sbyte v1, long v2) t1 = (-1, 2);
+		var t2 = (-1, 2);
+
+		IComparable o = (x1: "a", x2: 1.ToString ());
+
+		var arg = (x1: 1, x2: 1.ToString ());
+		if (arg.x2 != "1")
+			return;
+
+		Foo ((x1: (oarg, 'v'), x2: 1.ToString ()));
+
+		Test3 (ValueTuple.Create (1, "2"));
+
+		(int v1, string v2) y = (1, null);
+
+		(int v1, Action v2) y2 = (1, Main);
+		(int v1, Action v2) y3 = (ValueTuple<int, Action>) (1, Main);
+
+		(string v1, object v2) b = ("a", "b");
+
+		(int v1, long v2)? x = null;
+	}
+
+	static void Foo<T> (T arg)
+	{		
+	}
+
+	static void Test3 ((long a, object b) arg)
+	{
+	}
+}