Imported Upstream version 5.8.0.22

Former-commit-id: df344e34b07851d296efb3e6604c8db42b6f7aa3

mcs/tests/test-tuple-03.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Linq.Expressions;
+
+class TupleDeconstruct
+{
+	static int s_xx;
+	static long s_yy;
+
+	public static int Main ()
+	{
+		var (xx, yy) = (1, 2);
+		if (xx != 1)
+			return 1;
+
+		if (yy != 2)
+			return 2;
+
+		int x, y;
+		(x, y) = (1, 2);
+		if (x != 1)
+			return 3;
+
+		if (y != 2)
+			return 4;
+
+		(s_xx, s_yy) = Test3 ();
+		if (s_xx != 1)
+			return 5;
+
+		if (s_yy != 3)
+			return 6;
+
+//		var cwd = new ClassWithDeconstruct ();
+//		var (m1, m2) = cwd;
+
+//		(string, string) ss = cwd; // Error
+
+		return 0;
+	}
+
+	static void Test2 ()
+	{
+		var c = new C ();
+		(c.Prop1, c.Prop2) = (1, 2);
+	}
+
+	static (int, long) Test3 ()
+	{
+		return (1, 3);
+	}
+
+	static void TestCustom ()
+	{
+		return;
+	}
+}
+
+class ClassWithDeconstruct
+{
+	public void Deconstruct (out string f, out string s)
+	{
+		f = "a";
+		s = "z";
+	}
+}
+
+class C
+{
+	public int Prop1 { get; set; }
+	public int Prop2 { get; set; }
+}