Imported Upstream version 3.12.0

Former-commit-id: cf92446697332992ec36726e78eb8703e1f259d7

mcs/tests/test-decl-expr-01.cs

@@ -0,0 +1,65 @@
+using System;
+
+class DeclarationExpression
+{
+	public static int Main ()
+	{
+		Out (out int o);
+		if (o != 3)
+			return 1;
+
+		if (Out (out int o1)) {
+			if (o1 != 3)
+				return 2;
+		}
+
+		Out (out int o2 = 2);
+		if (o2 != 3)
+			return 3;
+
+		Out (out var o3);
+		if (o3 != 3)
+			return 4;
+
+		Ref (ref int r = 2);
+		if (r != 7)
+			return 5;
+
+		Ref (ref ((var r2 = 3)));
+		if (r2 != 8)
+			return 6;
+
+//		Out2 (str: "b", v: out var o5);
+//		if (o5 != 9)
+//			return 7;
+
+		Out3 (out var o6 = 9m);
+		if (o6.GetType () != typeof (decimal))
+			return 8;
+
+		Console.WriteLine ("ok");
+		return 0;
+	}
+
+	static bool Out (out int value)
+	{
+		value = 3;
+		return true;
+	}
+
+	static bool Out2 (out int v, string str)
+	{
+		v = 9;
+		return true;
+	}
+
+	static void Out3<T> (out T t)
+	{
+		t = default (T);
+	}
+
+	static void Ref (ref int arg)
+	{
+		arg += 5;
+	}
+}