[swift-evolution] [swift-evolution-announce] [Review] SE-0113: Add integral rounding functions to FloatingPoint

Erica Sadun erica at ericasadun.com
Fri Jul 1 12:20:43 CDT 2016

> On Jul 1, 2016, at 11:13 AM, Stephen Canon via swift-evolution <swift-evolution at swift.org> wrote:
>> On Jul 1, 2016, at 1:11 PM, Jordan Rose via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> [Proposal: https://github.com/apple/swift-evolution/blob/master/proposals/0113-rounding-functions-on-floatingpoint.md <https://github.com/apple/swift-evolution/blob/master/proposals/0113-rounding-functions-on-floatingpoint.md> ]
>> Just wondering, why no 'awayFromZero' case?
> It’s not defined or required by IEEE 754.  The others are.  I wouldn’t be opposed to adding some other rounding modes, but the IEEE 754 set is as good as any as a starting point.

I'm  hearing a lot of "Wouldn't it be nice if"s, for items falling outside IEEE 754. Could we have a native Math module that offered such niceties under a separate umbrella proposal? Would it be too cluttery to allow things like Double.tau, etc via a Math.Double extension or however that might work?

-- E, who abides by Canon law

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