polyglot.visit
Class RedundantCastRemover

java.lang.Object
  extended by polyglot.visit.NodeVisitor
      extended by polyglot.visit.RedundantCastRemover
All Implemented Interfaces:
java.lang.Cloneable, Copy

public class RedundantCastRemover
extends NodeVisitor

RedundantCastRemover removes redundant casts. It's typically used to clean up inefficient translations from the source language to Java. The AST must be type-checked before using this visitor.


Constructor Summary
RedundantCastRemover()
           
 
Method Summary
 Node leave(Node old, Node n, NodeVisitor v)
          This method is called after all of the children of n have been visited.
 
Methods inherited from class polyglot.visit.NodeVisitor
begin, copy, enter, enter, finish, finish, leave, override, override, toString, visitEdge, visitEdgeNoOverride
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

RedundantCastRemover

public RedundantCastRemover()
Method Detail

leave

public Node leave(Node old,
                  Node n,
                  NodeVisitor v)
Description copied from class: NodeVisitor
This method is called after all of the children of n have been visited. In this case, these children were visited by the visitor v. This is the last chance for the visitor to modify the tree rooted at n. This method will be called exactly the same number of times as entry is called. That is, for each node that is not overriden, enter and leave are each called exactly once.

Note that if old == n then the vistior should make a copy of n before modifying it. It should then return the modified copy.

This method is typically called by the method leave(parent, old, n v). If a subclass overrides the method leave(parent, old, n v) then this method may not be called.

Overrides:
leave in class NodeVisitor
Parameters:
old - The original state of root of the current subtree.
n - The current state of the root of the current subtree.
v - The NodeVisitor object used to visit the children.
Returns:
The final result of the traversal of the tree rooted at n.