return "(<- operator)"
}

// indirect operations via select
type SChan chan int

func (c SChan) Send(x int) {
	select {
	case c <- x:
	}
}

func (c SChan) Nbsend(x int) bool {
	select {
	default:
		return false
	case c <- x:
		return true
	}
	panic("nbsend")
}

func (c SChan) Recv() int {
	select {
	case x := <-c:
		return x
	}
	panic("recv")
}