swift – 如何创建可以在Key中保存任何内容的字典？或者它能够保持的所有可能的类型

我想创建一个不限制键类型的字典(如NSDictionary) @H_874_15@所以我试过

var Dict = Dictionary<Any,Int>()

@H_874_15@和

var Dict = Dictionary<AnyObject,Int>()

@H_874_15@结果

error: type 'Any' does not conform to protocol 'Hashable'
var Dict = Dictionary<Any,Int>()
           ^
<REPL>:5:12: error: cAnnot convert the expression's type '<<error type>>' to type '$T1'
var Dict = Dictionary<Any,Int>()
           ^~~~~~~~~~~~~~~~~~~~~~

@H_874_15@OK，我将使用Hashable

var Dict = Dictionary<Hashable,Int>()

@H_874_15@但

error: type 'Hashable' does not conform to protocol 'Equatable'
var Dict = Dictionary<Hashable,Int>()
           ^
Swift.Equatable:2:8: note: '==' requirement refers to 'Self' type
  Func ==(lhs: Self,rhs: Self) -> Bool
       ^
Swift.Hashable:1:10: note: type 'Hashable' does not conform to inherited protocol 'Equatable.Protocol'
protocol Hashable : Equatable
         ^
<REPL>:5:12: error: cAnnot convert the expression's type '<<error type>>' to type '$T1'
var Dict = Dictionary<Hashable,Int>()
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~

@H_874_15@所以Hashable继承自Equatable，但它不符合Equatable ???我不明白…

@H_874_15@反正，不断尝试

typealias KeyType = protocol<Hashable,Equatable> // KeyType is both Hashable and Equatable
var Dict = Dictionary<KeyType,Int>() // Now you happy?

@H_874_15@没有运气

error: type 'KeyType' does not conform to protocol 'Equatable'
var Dict = Dictionary<KeyType,rhs: Self) -> Bool
       ^
Swift.Hashable:1:10: note: type 'KeyType' does not conform to inherited protocol 'Equatable.Protocol'
protocol Hashable : Equatable
         ^
<REPL>:6:12: error: cAnnot convert the expression's type '<<error type>>' to type '$T1'
var Dict = Dictionary<KeyType,Int>()
           ^~~~~~~~~~~~~~~~~~~~~~~~~~

@H_874_15@我现在这么迷路，我怎么能让编译器满意我的代码？

@H_874_15@我想使用字典

var Dict = Dictionary<Any,Int>()
Dict[1] = 2
Dict["key"] = 3
Dict[SomeEnum@L_838_4@meValue] = 4

@H_874_15@我知道我可以使用Dictionary< NSObject，Int&gt，但它不是我真正想要的。