wrapper for checking returned values in coffee

after.coffee

result = do (value=some(operation(42))) ->
  throw Error "too low" if value < 0.5
  value

before.scala

val result = some(operation(42)) match {
    case value => {
      if (value < 0.5) {
           throw new RuntimeException("too low")
      } else {
      		value
  		}
    }
}