[swift-users] CharacterSet vs Set<Character>
dabrahams at apple.com
Sun Oct 2 13:56:19 CDT 2016
on Sun Oct 02 2016, Jean-Denis Muys <swift-users-AT-swift.org> wrote:
> I was playing with CharacterSet, and I came up with:
> let vowels = CharacterSet(charactersIn: "AEIOU")
Yeah, because CharacterSet is a set of UnicodeScalars, not a set of
Character. That should probably get fixed somehow. I suggest filing a
radar against Foundation.
> let char: Character = "E"
> That last line doesn't compile: I get "*cannot convert value of type
> 'Character' to expected argument type 'UnicodeScalar'*"
> The problem is, I could not find a simple way to convert from a character
> to a unicodeScalar. The best I found is the very ugly:
> Did I miss anything?
> Does it have to be that horrific?
For now, I'm afraid I don't have anything better for you. I very much
hope to improve String usability substantially for Swift 4.
> If so, I find using Set much better:
> let vowelsSet: Set<Character> = Set("AEIOU".characters)
> I must have missed something. Any suggestion welcome
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