Is there a way to get the C# compiler to emit an error if a switch(enum_val) is missing a case statement?

Question

I just realized I added a value to the list of \"must-handle\" values in my enum, but I didn\'t catch it until runtime. I know the C# compiler is really powerful when it com

Answer 1

You can use a meta-method that checks at runtime, but at least checks the whole switch.

https://github.com/faisalmansoor/MiscUtil/blob/master/EnumSwitch/EnumSwitch.cs

Answer 2

No there's no compile-time way to make that happen. However the very VERY simple answer is to have a default handler which simply throws an exception along the lines of, "this option wasn't handled, boo".

switch (c)
{
    case Colors.Red:  // no error, Red is a Color
        break;
    case Colors.Blue:
    case Colors.Green:  // no error, Blue and Green handled as well
        break;
    default:
        throw new Exception("Unhandled option: " + c.ToString());
}