Nested enum as dictionary key

Question

Nested enum as dictionary key

Is there any reason why this doesn't work? Note: enumeration as a dictionary key works if it is not nested.

struct OuterStruct
{
    enum InnerEnum
    {
        case none
        case a
        case b
    }
}

var dict : [OuterStruct.InnerEnum: String] = [OuterStruct.InnerEnum: String]()

+3

dictionary swift

user965972 04 dec. 14 at 16:27

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1 answer

Antonio · Accepted Answer · 2014-12-04T16:30:31+0000

You can fix this using the traditional way of creating a dictionary:

var dict : [OuterStruct.InnerEnum: String] = Dictionary<OuterStruct.InnerEnum, String>()

Note that you can use type inference and not specify the type of the variable:

var dict = Dictionary<OuterStruct.InnerEnum, String>()

As for why the shorthand syntax doesn't work, I don't have an answer - I think you should file a radar about it. I tried to convert InnerEnum

to struct and class and the same error is reported.

Nested enum as dictionary key

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