org.antlr.runtime.tree
Class TreeVisitor

java.lang.Object
  extended by 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 as we discover and finish nodes.


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. 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.



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