[swift-corelibs-dev] NSRegularExpression - NS prefix not dropped on Darwin

Tony Parker anthony.parker at apple.com
Fri Sep 16 23:19:08 CDT 2016

Hi Pushkar,

We decided to keep the NS on NSRegularExpression because we know that a strong goal for the Swift language is to have built-in support for regex. We wanted to be cautious about taking the name without knowing more about how that feature would shake out.

We should get a JIRA filed or a PR up to put the NS back for the class name in swift-corelibs-foundation.

- Tony

> On Sep 16, 2016, at 6:16 AM, Pushkar N Kulkarni via swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:
> Hello, 
> The NS prefix from NSRegularExpression seems to have been dropped only in open source Foundation. On Darwin the class is still called NSRegularExpression.
> https://github.com/apple/swift-corelibs-foundation/blob/master/Foundation/NSRegularExpression.swift#L30 <https://github.com/apple/swift-corelibs-foundation/blob/master/Foundation/NSRegularExpression.swift#L30>
> I went through the Drop NS prefix proposal <https://github.com/apple/swift-evolution/blob/master/proposals/0086-drop-foundation-ns.md> but couldn't relate this to any of the rules mentioned there (except for a possibility that we will have a RegularExpression value type in future only on Darwin!)
> Is there any particular reason for this difference?
> Thanks in advance!
> Pushkar N Kulkarni,
> IBM Runtimes
> Simplicity is prerequisite for reliability - Edsger W. Dijkstra
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