         }
     }
 
-    // MARK: Basic
+
+    // MARK: - Basic
     /// 字符串长度
     public var length: Int {
         return string.distance(from: string.startIndex, to: string.endIndex)

    }
}

public struct StringExtension {
    private var string: String


        self.string = string
    }


    //  MARK: Trans
    /// String 对应的 Boolean 值
