What is the Swift syntax “ .bar” called?

Question

Swift has this handy syntax:

enum Foo {
    case bar
    case baz
}


func hoge(foo: Foo) {
}


hoge(foo: .bar) //          


        

Answer 1

From Apple's Swift book:

The values defined in an enumeration (such as north, south, east, and west) are its enumeration cases.