[swift-evolution] SetAlgebra naming update

[davesweeris at mac.com]

Can we rename `subtract` to `complement`, since that’s the correct term? At least, I’m assuming that’s what `subtract` means… if not, I’m confused.
https://en.wikipedia.org/wiki/Set_(mathematics)#Complements

- Dave Sweeris

> On Mar 24, 2016, at 3:39 PM, Dave Abrahams via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
> Just an update:
> 
> The naming guidelines working group went back into negotiation over
> the shape of SetAlgebra (and thus, Set and OptionSet) for
> Swift 3, and reached a new consensus.  We intend to bring forward a
> proposal for the API shown here:
> 
>  http://dabrahams.github.io/swift-naming/SetAlgebra-Math.html
> 
> and to update the guidelines to suggest using the "form" prefix to
> create a verb phrase for a mutating method when the operation is
> fundamentally non-mutating and described by a noun.
> 
> Regards,
> 
> -- 
> Dave
> 
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