> On Aug 10, 2017, at 11:48 AM, Tino Heth via swift-evolution 
> <swift-evolution@swift.org> wrote:
> 
> I guess everyone agrees that there should be support for regular expressions 
> - I'm just not sure where, how and when to integrate it…
> People seem to have a (sometimes unhealthy…) passion for regex, so I'd like 
> to encourage a critical look on their importance.
> For example, I don't think they belong into the stdlib — there are more basic 
> (and much more simple) things like a Result-type or an operator for function 
> concatenation which are not included, so why should we treat regular 
> expressions differently?
> But It doesn't look like we'll see a fitting library that's bundled with 
> Swift anytime soon, and third-party regex Frameworks imho would cause big 
> confusion.

This goes back to the idea of “non-standard libraries” that ship with Swift, 
but aren’t imported by default. I think a “Swift.Regex” module would be 
awesome, but I agree that it probably doesn’t need to be in the standard 
library.

Dave

> 
> Anyways, as you suggest a special syntax, it would be required to integrate 
> support into Swift itself… although this is even deeper than the stdlib, I'm 
> more positive towards that direction, as it would allow some neat tricks:
> The expressions could not only be checked, but also translated at compile 
> time — which could give Swift a real kickstart to beat established solutions 
> in terms of execution speed.
> It would, on the other hand, not work for non-literal strings, so regular 
> expressions that are created at runtime would still need extra support…
> 
> If Core would consider to include compile-time regular expressions in the 
> future, I'd support adding the new syntax, even if it's only used like 
> NSExpression in the first implementation. Without that option, I think it's 
> not worth it, and I'd rather try to use custom operators to build matchers 
> that don't follow any regex standard, but are fast and safe to use.
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