gistfile1.go

type TaskNode struct {
  children []*Node
}

func (self *Task) AddChild(node *TaskNode) {
  self.children = append(self.children, node)
}

func (self *Task) ChildAt(index int) *TaskNode {
  return self.children[index]
}

// There are other functions on *Task, omitted for brevity

// TaskList should behave like a TaskNode, but with extra functionality
type TaskList struct {
  *TaskNode
  title string
}

func (self *TaskList) SetTitle(title string) {
  self.title = title
}

type Task struct {
  *TaskNode
  priority int
}

func (self *Task) GetPriority() int {
  return self.priority
}


// So now the following should work...

list := NewTaskList()
list.SetTitle("a list")
task := NewTask()
task.SetPriority(10)
list.AddChild(task)

// How can I cast this to *Task?
taskRef := list.ChildAt(0)