Swift Protocol (Protocol) Associatedtype Association type

When defining a protocol, it is useful to declare one or more association types as part of the protocol definition. An association type provides a placeholder (or alias) for a type in the protocol, and the actual type it represents is not specified until the protocol is accepted. You can specify the association type by associatedtype the keyword. For example, the method of updating a cell with a protocol declaration:

2. Model
4. struct Model {
6. Let age:int
8. }
12. protocols, using association types
14. Protocol Tableviewcell {
16. Associatedtype T
18. Func Updatecell (_ data:t)
20. }
24. Compliance with Tableviewcell
26. Class Mytableviewcell:uitableviewcell, Tableviewcell {
28. Typealias T = Model
30. Func Updatecell (_ data:model) {
32. //do something ...
34. }
36. }

Swift Protocol (Protocol) Associatedtype Association type