LowercaseInitializable

LowercaseInitializable.swift

public protocol LowercaseInitializable {
  
  static var allValues: [Self] { get }
  
  init?(rawValue: String)
}

extension LowercaseInitializable {
  
  public init?(rawValue: String) {
    let value = Self.allValues.filter { $0.rawValue.lowercaseString == rawValue.lowercaseString } // ERROR: Cannot invoke 'filter' with argument list of type '((_) -> _)'
    
    if let state = value.first {
      self = state
    } else {
      return nil
    }
  }
}