org.lsmp.djep.rewrite
Class CollectPowers

java.lang.Object
  org.lsmp.djep.rewrite.AbstractRewrite
      org.lsmp.djep.rewrite.CollectPowers

All Implemented Interfaces:

RewriteRuleI

public class CollectPowers
extends AbstractRewrite

Collect powers together so that x*x -> x^2 and x^n*x -> x^(n+1).

Author:

Rich Morris Created on 06-Oct-2004

Field Summary

Fields inherited from class org.lsmp.djep.rewrite.AbstractRewrite

nf, opSet, tu, xj

Constructor Summary

CollectPowers(XJep xj)

Method Summary

Node	apply(ASTFunNode node, Node[] children) Rewrites the node
boolean	test(ASTFunNode node, Node[] children) Returns true if node needs to be rewritten, according to this rule.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CollectPowers

public CollectPowers(XJep xj)

Method Detail

test

public boolean test(ASTFunNode node,
                    Node[] children)

Description copied from interface: RewriteRuleI

Returns true if node needs to be rewritten, according to this rule.

apply

public Node apply(ASTFunNode node,
                  Node[] children)
           throws ParseException

Description copied from interface: RewriteRuleI

Rewrites the node

Throws:

ParseException