Is it possible to type annotation for some tuple?

Using Swift
4

After trying it, I don't think this is what I'm looking for. I've tried a whole bunch of approaches involving tuples and enums and I keep finding roadblocks.

First I tried something like this:

enum DraftsURLParams {
    case searchParams(query: String?, tag: String?)
}

func chooseBuilder(withInput someTuple: DraftsURLParams) -> (DraftsURLParams) ->Void {
    switch someTuple {
    case is DraftsURLParams.searchParams: //error: Enum case 'searchParams(query:tag:)' is not a member type of 'DraftsURLParams'
        return funcOne
    default:
        return funcDefault
    }
}

Then I realized oh yeah, the enum case is not interpreting (query: String?, tag: String?)as a tuple. I think it's interpreting it as two associated values of type String? named query: and tag: respectively. So then I tried something like this:

enum DraftsURLParams {
    case searchParams = (query: "query", tag: "tag")
} //Raw value for enum case must be a literal

Doesn't work. Apparently a literal tuple doesn't count. See Enums with multiple raw values

In any case, even if raw values worked, it's not what I'm looking for since I want to be able to change the value of query and tag and not have them hard coded in.

For your approach of using an Array like [Variant], I like this idea but there are still some issues that I haven't wrapped my head around. This does satisfy my need for a heterogenous collection, but now I lose key value pairs. Plus arrays can change size.

The search continues.