semantic/prototype/Doubt/JSON.swift

public enum JSON {
	public typealias ArrayType = [JSON]
	public typealias DictionaryType = [Swift.String:JSON]

	case Number(Double)
	case Boolean(Bool)
	case String(Swift.String)
	case Array(ArrayType)
	case Dictionary(DictionaryType)
	case Null


	public var number: Double? {
		if case let .Number(d) = self { return d }
		return nil
	}

	public var boolean: Bool? {
		if case let .Boolean(b) = self { return b }
		return nil
	}

	public var string: Swift.String? {
		if case let .String(s) = self { return s }
		return nil
	}

	public var array: ArrayType? {
		if case let .Array(a) = self { return a }
		return nil
	}

	public var dictionary: DictionaryType? {
		if case let .Dictionary(d) = self { return d }
		return nil
	}

	public var isNull: Bool {
		if case .Null = self { return true }
		return false
	}

	public init?(object: AnyObject) {
		struct E: ErrorType {}
		func die<T>() throws -> T {
			throw E()
		}
		do {
			switch object {
			case let n as Double:
				self = .Number(n)
			case let b as Bool:
				self = .Boolean(b)
			case let s as Swift.String:
				self = .String(s)
			case let a as [AnyObject]:
				self = .Array(try a.map { try JSON(object: $0) ?? die() })
			case let d as [Swift.String:AnyObject]:
				self = .Dictionary(Swift.Dictionary(elements: try d.map { ($0, try JSON(object: $1) ?? die()) }))
			case is NSNull:
				self = .Null
			default:
				return nil
			}
		} catch { return nil }
	}
}


import Foundation