gistfile1.txt

case class Loanable[A](loan: A, close: () => Unit) {
  def foreach[B](f: A => B): Unit = {
    f(loan)
    close()
  }

  def map[B](f: A => B): Loanable[B] = {
    new Loanable(f(loan), close)
  }

  def flatMap[B](extraStuff: A => Loanable[B]): Loanable[B] = {
    val newLoan = extraStuff(loan): Loanable[B]
    new Loanable(newLoan.loan: B, () => { close(); newLoan.close() })
  }

  def filter(p: A => Boolean) = {
    ???
  }

  def get() = {
    close()
    loan
  }
}

object Loanable {
  def loan[A](a: A): Loanable[A] = new Loanable(a, () => {
    println("LOL CLOSING")
  })
}

object Thing {
  def main (args: Array[String]) {
    val whatever = for (
      x <- Loanable.loan(1);
      y <- Loanable.loan(3)
    ) { println(x + y) }
  }

}