But why add () when it could just be this:
var x: [Float]
var y: 100 of Float
Nothing makes it feel more inline than not wrapping it in some kind of bracket or parens:
// tuple
var z: (100 of Float, 50 of Double)
// function signature
func foo(components: 16 of Int)
// generic arguments
var s: Set<16 of Int>
// mixed with existing collection sugar:
var d: [String: 16 of Int] // Dictionary<String, 16 of Int>
var a: [16 of Int] // Array<16 of Int>
I wonder if that last one will be controversial. 