[swift-evolution] [Proposal] Add floor() and ceiling() functions to FloatingPoint

[Austin Rathe]

+1 to the proposal

On Sat, 25 Jun 2016 at 17:48 David Sweeris via swift-evolution <
swift-evolution at swift.org> wrote:

>
>
>
> Sent from my iPhone
> On Jun 25, 2016, at 05:06, Karl via swift-evolution <
> swift-evolution at swift.org> wrote:
>
> Proposal: https://gist.github.com/karwa/273db66cd8a5fe2c388ccc7de9c4cf31
>
>
> +1
>
> The only thing I'm worried about is the situation where we have "x = N.M",
> and `x.ceiling` equals maybe "(N+2).0" instead of "(N+1).0" because we ran
> out of precision and can't represent (N+1).0. I'm not sure what the exact
> values are where floats (or doubles) stop having enough precision to
> represent inter-integer values... It might be a moot point.
>
> I'd suggest the functions' descriptions to be changed from
> "[largest|smallest] integral value" to "[largest|smallest] representable
> integral value".
>
> - Dave Sweeris
>
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