[swift-evolution] ed/ing, InPlace, Set/SetAlgebra naming resolution

[Chris Lattner]

> On Feb 11, 2016, at 10:28 PM, David Owens II via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I don’t know if this has been suggested already… but why not just use the same name and have an `inPlace` parameter with a default value?

inplace, or not, fundamentally affects the operation, including the return type.  On a struct, it is the different between the method being mutating or not.

-Chris