Generics

[SamTebbs33]

Declaring types that use generics

class A<T, E.> {
    var obj : T?, obj2 : E?
    func foo(foo : T, bar : E, baz : K) {
    }
}

Declaring a variable of a type that uses generics

var a : A<String, Integer> = A<String, Integer>()
var b = A<String, Integer>()
var c = A<String>() // Missing generics are inferred as Object

Using functions that use generics that are not supplied by the enclosing class.

func foo(obj : A){
    ...
}
foo("Sam") // A is inferred as being String

Type restrictions can also be applied.

<T : ClassA, InterfaceA, InterfaceB>

The type used in place of T would then have to extend ClassA and implement the InterfaceA and InteferfaceB interfaces.