From String To Token

From String To Token

import Foundation

enum LayoutToken: StringLiteralConvertible {
    case Plain(Int)
    case Container(Int)
    case ComponentId(Int)
    
    func description() -> String{
        switch self {
        case .Plain(let value):
            return "\(value)"
        case .Container(let value):
            return "container+\(value)"
        case .ComponentId(let value):
            return "componentId+\(value)"
        }
    }
    

    init(stringLiteral value: String) {
        self = buildFromString(value)
    }
    
    init(extendedGraphemeClusterLiteral value: String) {
        self = buildFromString(value)
    }
    
    init(unicodeScalarLiteral value: String) {
        self = buildFromString(value)
    }
}

private func buildFromString(value: String) -> LayoutToken{
    if (value.rangeOfString("container") != nil) {
        return .Container(15)
    } else if (value.rangeOfString("componentId") != nil) {
        return .ComponentId(15)
    } else {
        return .Plain(30)
    }
}


//let string: LayoutToken = "container+20"
let string: LayoutToken = "componentId+20"

switch string {
case LayoutToken.Plain:
    println("Plain")
case LayoutToken.Container:
    println("Container")
case LayoutToken.ComponentId:
    println("ComponentId")
}

//let plain = LayoutToke