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

[David Hart]

Whatever the naming scheme, I would be hesitant to have the non-mutating versions of floor and ceil have different endings, seeing how connected they are. So:

floor, ceil 
floored, ceiled 
flooring, ceiling

But not a mix.

> On 27 Jun 2016, at 07:13, Xiaodi Wu via swift-evolution <swift-evolution at swift.org> wrote:
> 
>> On Mon, Jun 27, 2016 at 12:45 AM, Charlie Monroe via swift-evolution <swift-evolution at swift.org> wrote:
>> Given the API guidelines, it should be
>> 
>> rounded, ceiled, floored 
>> 
>> for returning the rounded/ceiled/floored value and
>> 
>> round(), ceil(), floor()
>> 
>> would be the mutating variants. Question is where it's not too confusing for anyone knowing these from another language.
> 
> Although colloquially they can be "verbed," ceil[ing] and floor are formally nouns, just like sine, union, etc. So the API guidelines would recommend: `rounded`, `ceiling`, `floor` for the non-mutating version and `round`, `formCeiling`, and `formFloor` for the mutating version.
> 
>> 
>>> On Jun 25, 2016, at 9:02 PM, Remy Demarest via swift-evolution <swift-evolution at swift.org> wrote:
>>> 
>>> We don't seem to have a rounded() function either as part of FloatingPoint, we should probably have these methods in the end:
>>> 
>>> func rounded() -> Self
>>> func rounded(withPrecision: Int) -> Self
>>> 
>>> Along with the 4 other methods proposed below.
>>> 
>>>>> Le 25 juin 2016 à 11:55, Haravikk via swift-evolution <swift-evolution at swift.org> a écrit :
>>>>> 
>>>>> 
>>>> 
>>>>> On 25 Jun 2016, at 11:06, Karl via swift-evolution <swift-evolution at swift.org> wrote:
>>>>> 
>>>>> floor() and ceil(), exactly like C. ceiling() is more descriptive and is a mathematical term of art.
>>>>> nextIntegralUp() and nextIntegralDown() are more descriptive still, but possibly misleading as (4.0).nextIntegralUp() == 4.0
>>>> I'm in favour of these capabilities being there, but in terms of naming I've often wondered why it can't just be part of a rounding group of methods like so:
>>>> 
>>>> 	func roundedUp() -> Self { … }
>>>> 	func roundedUp(withPrecision:Int) -> Self { … }
>>>> 	func roundedDown() -> Self { … }
>>>> 	func roundedDown(withPrecision:Int) -> Self { … }
>>>> 
>>>> Since the methods with implied precision of zero are equivalent to floor and ceiling surely? I know floor and ceiling are pretty common terms, but they're just a form rounding when it comes down to it.
>>>> _______________________________________________
>>>> swift-evolution mailing list
>>>> swift-evolution at swift.org
>>>> https://lists.swift.org/mailman/listinfo/swift-evolution
>>> 
>>> _______________________________________________
>>> swift-evolution mailing list
>>> swift-evolution at swift.org
>>> https://lists.swift.org/mailman/listinfo/swift-evolution
>> 
>> 
>> _______________________________________________
>> swift-evolution mailing list
>> swift-evolution at swift.org
>> https://lists.swift.org/mailman/listinfo/swift-evolution
>> 
> 
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20160627/88a97fe6/attachment.html>