PredicateExpressions for String is only available for FOUNDATION_FRAMEWORK

[axelandersson]

Hi,

The predicate expressions StringLocalizedStandardContains and StringLocalizedCompare are under #if FOUNDATION_FRAMEWORK.

I would like to use these on Linux as well.

[jmschonfeld]

Those two are currently unavailable because the APIs that they represent (String.localizedStandardContains and String.localizedStandardCompare) are not yet available in the package. We can add the Predicate operators as soon as the actual APIs are available. It looks like we have #284 open to track localized comparison, @itingliu do we have another radar tracking bringing over the string contains functions (localized in particular)?

[itingliu]

Yes we have a radar for implementing localized contain: 104656368. We can create an issue as well if we think that helps keeping things on track.