Format in kotlin string templates

Question

Kotlin has an excellent feature called string templates. I really love it.

 val i = 10 
 val s = \"i = $i\" // evaluates to \"i = 10\"

But

Answer 1

A couple of examples:

infix fun Double.f(fmt: String) = "%$fmt".format(this)
infix fun Double.f(fmt: Float) = "%${if (fmt < 1) fmt + 1 else fmt}f".format(this)

val pi = 3.14159265358979323

println("""pi = ${pi f ".2f"}""")
println("pi = ${pi f .2f}")