Swift struct referencing another struct - swift

Question

I'm testing the following code in an Xcode Playground.
struct Coordinate: Codable {
var latitude: Double
var longitude: Double
}
struct Landmark: Codable {
var name: String
var foundingYear: Int
var location: Coordinate
}
var MyCoordinate: Coordinate = Coordinate.init(latitude: 30.1, longitude: 10.2)
var LandmarkA: Landmark = Landmark.init(name: "My Landmark", foundingYear: 2017, location: MyCoordinate)
var LandmarkB: Landmark = Landmark.init(name: "My Landmark 2", foundingYear: 2016, location: MyCoordinate)
LandmarkA.location.latitude = 12.1
print (LandmarkA.location.latitude) // 12.1
print (LandmarkB.location.latitude) // 30.1
Now if I convert this code to classes instead of structs.
class Coordinate {
var latitude: Double
var longitude: Double
init(latitude: Double, longitude: Double) {
self.latitude = latitude
self.longitude = longitude
}
}
class Landmark {
var name: String
var foundingYear: Int
var location: Coordinate
init(name: String, foundingYear: Int, location: Coordinate) {
self.name = name
self.foundingYear = foundingYear
self.location = location
}
}
var MyCoordinate: Coordinate = Coordinate.init(latitude: 30.1, longitude: 10.2)
var LandmarkA: Landmark = Landmark.init(name: "My Landmark", foundingYear: 2017, location: MyCoordinate)
var LandmarkB: Landmark = Landmark.init(name: "My Landmark 2", foundingYear: 2016, location: MyCoordinate)
LandmarkA.location.latitude = 12.1
print (LandmarkA.location.latitude) // 12.1
print (LandmarkB.location.latitude) // 12.1
Is it possible to get structs to behave the same way as classes in terms of what location is equal to? If I change the coordinate either by doing LandmarkA.location.latitude or MyCoordinate.latitude it should set both LandmarkA and LandmarkB. This behavior works with classes but I can't use Codable in classes and there is less code needed to setup structs.
The last two print statements in the first example I would like to both be 12.1 and the same since it's both referencing the same object.
This is the only thing I can't figure out with structs. structs have everything else I need, Codeable, functions within the struct, minimal setup code, etc.
I would really prefer to use structs but if this isn't possible I will probably settle for using classes.
Any thoughts of how to achieve this?