fun show_dot is abstract
end
-# Node used in Tree implementation
-# nodes are used to store values
-# * `E`: type of value
-class TreeNode[K: Comparable, E]
+# Abstract node structure used in `Tree` implementation
+#
+# Nodes are defined recursively each node (except the root one) pointing to a parent.
+# Nodes can be used to store data with the `TreeNode::value` attribute.
+#
+# Formal parameters:
+# * `K`: key type (a `Comparable` one so nodes can be sorted by their keys)
+# * `E`: value type (to store your data)
+abstract class TreeNode[K: Comparable, E]
super Comparable
# TreeNode type
# `value` stored in the node
var value: E
- # Direct parent of this node (null if the node is root)
+ # Direct parent of this node (`null` if the node is root)
+ #
+ # See `Tree::root`.
var parent: nullable N = null is writable
# Depth in tree (length of the path from `self` to `root`)
redef fun to_s do return "\{{value or else ""}\}"
# Return dot representation of this node
- # Used for debugging by `AbstractTree::show_dot`
+ #
+ # See `Tree::show_dot`.
fun to_dot: String do
var res = new FlatBuffer
res.append "\"{self}\";\n"