TreeVisitor (ANTLR 3 Runtime 3.5.3 API)

java.lang.Object
- org.antlr.runtime.tree.TreeVisitor

```
public class TreeVisitor
extends Object
```
Do a depth first walk of a tree, applying pre() and post() actions as we discover and finish nodes.

Field Summary

Fields
Modifier and Type Field Description

protected TreeAdaptor adaptor

Constructor Summary

Constructors
Constructor Description

TreeVisitor()

TreeVisitor(TreeAdaptor adaptor)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`visit(Object t, TreeVisitorAction action)`	Visit every node in tree t and trigger an action for each node before/after having visited all of its children.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - adaptor
```
protected TreeAdaptor adaptor
```
- Constructor Detail
  - TreeVisitor
```
public TreeVisitor(TreeAdaptor adaptor)
```
  - TreeVisitor
```
public TreeVisitor()
```
- Method Detail
  - visit
```
public Object visit(Object t,
                    TreeVisitorAction action)
```
    Visit every node in tree t and trigger an action for each node before/after having visited all of its children. Execute both actions even if t has no children. If a child visit yields a new child, it can update its parent's child list or just return the new child. The child update code works even if the child visit alters its parent and returns the new tree. Return result of applying post action to this node.