[swift-evolution] [Proposal draft] Enhanced floating-point protocols

[Stephen Canon]

On Apr 15, 2016, at 11:05 AM, Guillaume Lessard via swift-evolution <swift-evolution at swift.org> wrote:

> I don’t see why this is needed; there isn't an AdditivelyInvertible protocol

That’s precisely SignedArithmetic, just under a different name.

– Steve
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