import RegexBuilder
import Foundation
import Playgrounds

#Playground {
    let regex = Regex {
       "Name:"
       OneOrMore(.whitespace)
       OneOrMore {
          CharacterClass("a"..."z", "A"..."Z")
       }
    }
    let message = "Name: John"
    let result = message.matches(of: regex)
    if !result.isEmpty {
       print(result[0].output)
       // "Name: John"
    }
}