Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-77.cs

@@ -0,0 +1,65 @@
+//
+// Tests the various string implicit conversions
+//
+
+class XX {
+
+	enum X {
+		A = 1
+	}
+	
+	public static int Main ()
+	{
+		int one = 1;
+		int two = 2;
+		
+		if (("a" + "b") != "ab")
+			return 1;
+
+		if (("one" + one) != "one1")
+			return 2;
+
+		if ((one + "one") != "1one")
+			return 3;
+
+		if ((one + "two" + two) != "1two2")
+			return 4;
+
+		if ((X.A + "a") != "Aa")
+			return 5;
+
+		if (((int)X.A) + "a" != "1a")
+			return 6;
+	
+		if ((1 + " " + "hello") != "1 hello")
+			return 7;
+	
+		const string s1 = null + (string)null;
+		const string s2 = (string)null + null;
+
+		string s;
+		s = (string)null + null;
+		if (s.Length != 0)
+			return 8;
+
+		s = null + (string)null;
+		if (s.Length != 0)
+			return 9;
+
+		s = (object)null + null;
+		if (s.Length != 0)
+			return 10;
+
+		s = null + (object)null;
+		if (s.Length != 0)
+			return 11;
+
+		s = (object)1 + null;
+		if (s != "1")
+			return 12;
+	
+		System.Console.WriteLine ("test ok");
+		return 0;
+	}
+}
+