Use nested decended enum cases as parent enum cases - arrays

Question

In the popular board game Monopoly, players have the opportunity to buy/trade different properties, and when they monopolize a certain neighborhood, they can build houses. I am trying to express all of these properties as a nested enumeration in Swift, but when it comes to expressing a player's properties in an Array, I'm stumped.
Here is what I have tried so far.
enum Property {
enum Brown {
case mediterranean, baltic
}
enum LightBlue {
case oriental, vermont, connecticuit
}
enum pink {
case stCharles, states, virginia
}
...
}
var properties: [Property] = [
Property.Brown.baltic, // ERROR: Cannot convert value of type 'Property.Brown' to expected element type 'Property'
Property.Brown.mediterranean
]
As you can see, I cannot store these Properties in a [Property] Array, because a Property.Brown isn't a Property (understandable). What would I need to change to be able to store Property.<Insert Neighborhood Here>s in an array? I understand that an [Any] would work, but I am concerned about type safety, so this won't work.
Edit 05 July 2018, 13:18 PDT
I am writing a program that will act as the bank for a Monopoly game and need a way to determine which players (or the bank) owns properties. I'm currently Playgrounding and prototyping to figure out what works for me.

Answer 1

As you know,
because a Property.Brown isn't a Property (understandable).
You may need a type common to your Property.Brown, Property. LightBlue, ...
Maybe you can use a protocol just for storing them in an Array:
protocol PropertyEnums {}
enum Property {
enum Brown: PropertyEnums {
case mediterranean, baltic
}
enum LightBlue: PropertyEnums {
case oriental, vermont, connecticuit
}
//...
}
var properties: [PropertyEnums] = [
Property.Brown.baltic,
Property.Brown.mediterranean,
//...
]
But I cannot be sure if this might be the best solution for you, as you are not showing the use cases of properties.
Something like this might be better for some use cases:
enum Property {
enum Brown {
case mediterranean, baltic
}
enum LightBlue {
case oriental, vermont, connecticuit
}
//...
case brown(Brown)
case lightBlue(LightBlue)
//...
}
var properties: [Property] = [
.brown(.baltic),
.brown(.mediterranean),
//...
]
Please show us how do you want to use your properties.