[swift-evolution] Strings in Swift 4

[Joe Groff]

Jordan points out that the generalized slicing syntax stomps on '...x' and 'x...', which would be somewhat obvious candidates for variadic splatting if that ever becomes a thing. Now, variadics are a much more esoteric feature and slicing is much more important to day-to-day programming, so this isn't the end of the world IMO, but it is something we'd be giving up.

-Joe