Listener<TContext, TNode> Class ​
Definition ​
A listener for a syntax tree. A listener walks the tree and gets notified when nodes are reached. An alternative to processing. Useful to build something completely new from the tree whereas processing is more useful to mutate the tree.
c#
public abstract class Listener<TContext, TNode>
where TNode : Node<TNode>Type Parameters ​
| Name | Description |
|---|---|
TContext | The type of the context object. |
TNode | The type of the nodes to listen to. |
Constructors ​
| Name | Description |
|---|---|
Listener() |
Methods ​
| Name | Description |
|---|---|
AfterListenToNode(TContext, TNode) | Called after a node and its descendants have been listened to. |
BeforeListenToNode(TContext, TNode) | Called before a node and its descendants are listened to. |
Listen(TContext, TNode) | Listen to the specified node and its descendants. |
ListenToNode(TContext, TNode) | Called when the node is listened to. |
ShouldListenToDescendants(TContext, TNode) | Return a value indicating whether child nodes should be listened to or not. Defaults to true. |