SundanceDerivative.cpp

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//                             Sundance
//                 Copyright 2011 Sandia Corporation
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/* @HEADER@ */

#include "SundanceDerivative.hpp"

using namespace Sundance;
using namespace Sundance;
using namespace Teuchos;

Derivative::Derivative(int direction)
  : ScalarExpr(), m_()
{
  m_[direction] = 1;
}

bool Derivative::lessThan(const ScalarExpr* other) const
{
  const Derivative* d = dynamic_cast<const Derivative*>(other);
  TEUCHOS_TEST_FOR_EXCEPTION(d==0, std::logic_error, "cast should never fail at this point");
  return multiIndex() < d->multiIndex();
}


std::ostream& Derivative::toText(std::ostream& os, bool /* paren */) const 
{
  os << "D[" << m_.toString() << "]";
  return os;
}


XMLObject Derivative::toXML() const 
{
  XMLObject rtn("Derivative");
  rtn.addAttribute("m", m_.toString());
  return rtn;
}