[swift-evolution] [Pitch] Retiring `where` from for-in loops

[Erica Sadun]

> On Jun 13, 2016, at 9:23 AM, let var go via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I am 100% with Charlie on this. Expressiveness has to do with the *effectiveness* of conveying a thought or a feeling.
> 
> Keep "where". It is expressive. It conveys a specific idea effectively and concisely.

For those of you in favor of retaining `where`, how do you feel about adding `while`, `until`, `unless`, etc?

-- E