[swift-evolution] protocol-oriented integers (take 2)

[Dave Abrahams]

on Sat Jan 14 2017, Dave Abrahams <swift-evolution at swift.org> wrote:

> That said, the ability to interpret integer literals as an arbitrary
> Arithmetic isn't used anywhere in the standard library, so I'd like to
> consider undoing
> https://github.com/apple/swift/commit/de5b03ddc41be9c5ca5e15d5709eb2be069286c1
> and moving ExpressibleByIntegerLiteral down the protocol hierarchy to
> BinaryInteger.

Oh, and I meant to add: maybe the right way for an arbitrary X modeling
Arithmetic to spell zero (which is needed for negation) is something
like

   X.additiveIdentity

or

   X.zero

in other words, via a requirement

   static var theNameWeChoose: Self { get }

-- 
-Dave