Can you use string/character literals within Swift string interpolation?

Question

Is it possible to use a String/Character literal within string interpolation in Swift?

The language reference says:

The expression you write insid

Answer 1

I hope it's:

let strfunc = repeat("H",20) as string
println( "Output: \(strfunc)" );

Answer 2

It can be done starting in Swift 2.1: http://www.russbishop.net/swift-2-1

Prior to that, it wasn't possible.