Implement +[NSRegularExpression escapedPatternForString:] and -[NSString enumerateSubstringsInRange:options:usingBlock]

[ethanc8]

[ethanc8]

Apple's Swift implementations:

• -[NSString enumerateSubstringsInRange:options:usingBlock]
• +[NSRegularExpression escapedPatternForString:]

See also CoreFoundation:

• +[NSRegularExpression escapedPatternForString:]

[ethanc8]

I believe a15fa66 has solved many of the stylistic issues.

[fredkiefer]

Apart from the NSLog statements this looks fine for me now.

[rfm]

This has been outstanding for a while ... I'll tweak any minor remaining issues.

[ethanc8]

Sorry, I've been very busy. You can remove the log statements; I don't think they'd be useful for anyone debugging other than me.