SundanceUnaryExpr.hpp

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//                              Sundance
//                 Copyright (2005) Sandia Corporation
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// retains certain rights in this software.
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#ifndef SUNDANCE_UNARYEXPR_H
#define SUNDANCE_UNARYEXPR_H

#include "SundanceDefs.hpp"
#include "SundanceExprWithChildren.hpp"
#include "SundanceExpr.hpp"

namespace Sundance
{
using namespace Sundance;
using namespace Teuchos;


/** 
 * UnaryExpr is a base class for operators that map a single
 * scalar expr to another scalar expr. 
 */
class UnaryExpr : public ExprWithChildren
{
public:
  /** construct with the argument */
  UnaryExpr(const RCP<ScalarExpr>& arg);

  /** virtual dtor */
  virtual ~UnaryExpr() {;}

  /** Return the operand */
  Expr arg() const {return child(0);}

  /** Downcast the argument to an evaluatable expr */
  const EvaluatableExpr* evaluatableArg() const 
    {return evaluatableChild(0);}

          
private:
};
}

#endif