package net.sf.yacas;/// Class for matching an expression to a given number.class MatchNumber extends YacasParamMatcherBase{  public MatchNumber(BigNumber aNumber)  {    iNumber = aNumber;  }  public boolean ArgumentMatches(LispEnvironment  aEnvironment,                                      LispPtr  aExpression,                                      LispPtr[]  arguments) throws Exception  {    if (aExpression.Get().Number(aEnvironment.Precision()) != null)      return iNumber.Equals(aExpression.Get().Number(aEnvironment.Precision()));    return false;  }  protected BigNumber iNumber;}