swift-literal 原义字面量转换

  • 个人理解是什么？
    类似java的反射 字符串到类的映射,如给一个字符串能直接初始化一个类
  • 太抽象？不好懂？见效果
屏幕快照 2016-12-16 下午2.17.59.png

  • 如何实现
    自带许多的
    typealias ALC = ExpressibleByArrayLiteral
    typealias BLC = ExpressibleByBooleanLiteral
    typealias DLC = ExpressibleByDictionaryLiteral
    typealias FLC = ExpressibleByFloatLiteral
    typealias NLC = ExpressibleByNilLiteral
    typealias ILC = ExpressibleByIntegerLiteral
    typealias SLC = ExpressibleByStringLiteral
    class Person: ExpressibleByStringLiteral {
    let name: String
    init(name value: String) {
    self.name = value
    }

        required convenience init(stringLiteral value: String) {
        self.init(name: value)
    }

    required convenience init(extendedGraphemeClusterLiteral value: String) {
       self.init(name: value)
    }

   required convenience init(unicodeScalarLiteral value: String) {
         self.init(name: value)
    }
}

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