//===- NullaryOp.h --------------------------------------------------------===//
//
//                     The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef MCLD_SCRIPT_NULLOP_H
#define MCLD_SCRIPT_NULLOP_H

#include <mcld/Script/Operator.h>
#include <cassert>

namespace mcld
{

class Operand;
class IntOperand;
class Module;
class TargetLDBackend;

/** \class NullaryOp
 *  \brief This class defines the interfaces to an nullary operator token.
 */

template<Operator::Type TYPE>
class NullaryOp : public Operator
{
private:
  friend class Operator;

  NullaryOp()
    : Operator(Operator::NULLARY, TYPE)
  {}

public:
  ~NullaryOp()
  {}

  IntOperand* eval(const Module& pModule, const TargetLDBackend& pBackend);

  void appendOperand(Operand* pOperand)
  {
    assert(0);
  }
};

template<>
IntOperand* NullaryOp<Operator::SIZEOF_HEADERS>::eval(const Module&,
                                                      const TargetLDBackend&);
template<>
IntOperand* NullaryOp<Operator::MAXPAGESIZE>::eval(const Module&,
                                                   const TargetLDBackend&);

template<>
IntOperand* NullaryOp<Operator::COMMONPAGESIZE>::eval(const Module&,
                                                      const TargetLDBackend&);

} // namespace of mcld

#endif