[swift-evolution] [swift-corelibs-dev] Proposal: Conforming NSDate to Comparable

[Tony Parker]

Hi Chris,

Thanks for bringing this idea to the list.

Is NSDate really the only thing that we want to conform to comparable, or is there a set of classes which should do so? I’d like to think about the larger set of consequences here (and if possible, deal with one coherent answer for all of Foundation rather than do these classes one at a time).

- Tony

> On Dec 5, 2015, at 3:36 PM, Chris Amanse via swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:
> 
> Hello Swift Developers,
> 
> I think it's a good idea to conform NSDate to the Comparable protocol, so instead of using:
> 
> if someDate.compare(today) == .OrderedAscending { }
> 
> Developers can easily compare using compare dates using comparison operators:
> 
> if someDate < today { }
> 
> In my opinion, the code is still readable if developers use comparison operators on NSDates.
> 
> Here's a quick implementation from my swift-corelibs-foundation fork: https://github.com/chrisamanse/swift-corelibs-foundation/commit/3c4eff643c5271de5bec2461798051347be13916 <https://github.com/chrisamanse/swift-corelibs-foundation/commit/3c4eff643c5271de5bec2461798051347be13916>
> 
> Thank you.
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