enums with associated types can enable polymorphic currying. May help with functional programming.

polymorphic_currying.swift

// Polymorphic currying

enum Bar {
	case weight(lbs: CGFloat)
}

func foo(_ valueA: String, _ valueB: Int) -> (Bar) -> ()
{
	return { _bar in
		switch _bar {
		case .weight(let lbs):
			print(valueA, valueB, lbs)
		}
	}
}
func foo(_ valueA: String) -> (Bar) -> ()
{
	return { _bar in
		switch _bar {
		case .weight(let lbs):
			print(valueA, lbs)
		}
	}
}

do {
	let m = foo("cat", 9)
	m(Bar.weight(lbs: 6))
	m(.weight(lbs: 88))
}

do {
	let m = foo("cat")
	m(Bar.weight(lbs: 6))
	m(.weight(lbs: 88))
}