[swift-users] Dictionary<String, AnyObject> can accept Bool as a Value, but my own function can't

[Jeremy Pereira]

Bool is a struct in Swift and doesn’t inherit from AnyObject. 

The reason why dictionary.updateValue(aBool, forKey: key) works for you is that you have imported Foundation. which enables bridging between Dictionary and Foundation.NSDictionary, including converting value arguments into an Objective-C type.


> On 25 May 2016, at 05:07, zh ao via swift-users <swift-users at swift.org> wrote:
> 
> See the code:
> 
> do {
>     var dictionary = Dictionary<String, AnyObject>()
>     
>     func update<T:AnyObject>(value:T, key:String) {
>         dictionary.updateValue(value, forKey: key)
>     }
>     
>     let aBool = true
>     let key = "testBool"
>     
>     update(aBool, key: key)
>     // cannot invoke 'update' with an argument list of type '(Bool, key: String)'
>     
>     dictionary.updateValue(aBool, forKey: key)
>     // works
> }
> 
> My own function will get the error as shown in the comment part. But it seams that Dictionary<String, AnyObject> has no issue. How to improving my code?
> 
> Zhaoxin
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