How Does One Make Scala Control Abstraction in Repeat Until?

Question

I am Peter Pilgrim. I watched Martin Odersky create a control abstraction in Scala. However I can not yet seem to repeat it inside IntelliJ IDEA 9. Is it the IDE?

Answer 1

How about a one liner for repeat until.

def repeat(b: => Unit) = new AnyRef {def until(c: => Boolean) {b; while (! c) b}}

Which, for example, gives:-

scala> repeat {
     |   println("i = "+i)
     |   i+=1
     | } until (i >= 10)
i = 0
i = 1
i = 2
i = 3
i = 4
i = 5
i = 6
i = 7
i = 8
i = 9