Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0034-3.cs

@@ -0,0 +1,37 @@
+// CS0034: Operator `+' is ambiguous on operands of type `Y' and `X'
+// Line: 22
+public class Y {
+	public static implicit operator int (Y y) {
+		return 0;
+	}
+
+	public static implicit operator string (Y y) {
+		return null;
+	}
+
+	public static implicit operator Y (string y) {
+		return null;
+	}
+
+	public static implicit operator Y (int y) {
+		return null;
+	}
+}
+
+public class X {
+	public static implicit operator int (X x) {
+		return 0;
+	}
+
+	public static implicit operator string (X x) {
+		return null;
+	}
+}
+
+public class C {
+	public static void Main ()
+	{
+		Y y = new Y () + new X ();
+	}
+}
+