SundanceDerivOfSymbFunc.cpp

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// ************************************************************************
// 
//                              Sundance
//                 Copyright (2005) Sandia Corporation
// 
// Copyright (year first published) Sandia Corporation.  Under the terms 
// of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government 
// retains certain rights in this software.
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// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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#include "SundanceDerivOfSymbFunc.hpp"

#include "SundanceTestFuncElement.hpp"

#include "SundanceCoordExpr.hpp"
#include "PlayaTabs.hpp"
#include "SundanceOut.hpp"

using namespace Sundance;
using namespace Sundance;

using namespace Sundance;
using namespace Teuchos;


DerivOfSymbFunc::DerivOfSymbFunc(const MultiIndex& op, 
  const RCP<ScalarExpr>& arg)
  : DiffOp(op, arg), argFid_(FunctionIdentifier())
{
  const SymbolicFuncElement* f 
    = dynamic_cast<const SymbolicFuncElement*>(evaluatableArg());
  TEUCHOS_TEST_FOR_EXCEPTION(f==0, std::logic_error, "argument to DerivOfSymbFunc ctor "
                     "is not a symbolic function");
  argFid_ = f->fid();
}


Deriv DerivOfSymbFunc::representMeAsFunctionalDeriv() const 
{
  const SymbolicFuncElement* f 
    = dynamic_cast<const SymbolicFuncElement*>(evaluatableArg());
  TEUCHOS_TEST_FOR_EXCEPTION(f==0, std::logic_error, "DerivOfSymbFunc::"
                     "representMeAsFunctionalDeriv(), 'this' pointer "
                     "is not a symbolic function");
  return Deriv(f, SpatialDerivSpecifier(mi()));
}

Evaluator* DerivOfSymbFunc::createEvaluator(const EvaluatableExpr* expr,
                                   const EvalContext& context) const
{
  return new DerivOfSymbFuncEvaluator(dynamic_cast<const DerivOfSymbFunc*>(expr), context);
}


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