[Rant] Indexing into ArraySlice

[hooman (Hooman Mehr)]

@taylorswift

Isn’t all you’re trying to do to add the words “ start ”, “ end ”, and “ index ” into the call site somewhere? I don’t think you can do that and achieve a concise syntax at the same time.

No, please look at the comments around my _index() function above. I don't want to address offsets relative to any index other than startIndex and endIndex. I don't need to refer to them explicitly: Negative offsets only make sense for endIndex while offsets >=0 only make sense for startIndex. So I only need the label to distinguish it from the normal index API.