Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-801.cs

@@ -0,0 +1,56 @@
+using System;
+
+class C
+{
+	public enum E
+	{
+		V_0 = 10,
+		V_1	= 50,
+		V_2 = 80
+	}
+	
+	public static implicit operator E (C x)
+	{
+		return E.V_2;
+	}
+
+	public static implicit operator int (C x)
+	{
+		return 1;
+	}
+
+	public static int Main ()
+	{
+		var v = new C ();
+		int i = E.V_1 - v;
+		if (i != -30)
+			return 1;
+		
+		i = v - E.V_1;
+		if (i != 30)
+			return 10;
+		
+		E e = E.V_1 + v;
+		if (e != (E) 51)
+			return 2;
+		
+		e = v + E.V_0;
+		if (e != (E) 11)
+			return 3;
+		
+		bool b = E.V_2 > v;
+		if (b)
+			return 4;
+		
+		int iv = 900;
+		e = iv - E.V_1;
+		if (e != (E)850)
+			return 5;
+		
+		i = v - E.V_1;
+		if (i != (int) 30)
+			return 6;
+
+		return 0;
+	}
+}