org.antlr.runtime.tree
Class TreeVisitor

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

public class TreeVisitor
extends java.lang.Object

Do a depth first walk of a tree, applying pre() and post() actions we go.

Field Summary

protected TreeAdaptor

adaptor

Constructor Summary

TreeVisitor()

TreeVisitor(TreeAdaptor adaptor)

Method Summary

java.lang.Object

visit(java.lang.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 java.lang.Object visit(java.lang.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. Bottom up walk. Execute both actions even if t has no children. Ignore return results from transforming children since they will have altered the child list of this node (their parent). Return result of applying post action to this node.