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#ifndef CPLUSPLUS_PP_CLIENT_H
#define CPLUSPLUS_PP_CLIENT_H

#include <CPlusPlusForwardDeclarations.h>
#include <QVector>

QT_BEGIN_NAMESPACE
class QByteArray;
class QString;
QT_END_NAMESPACE

namespace CPlusPlus {

class Macro;

class CPLUSPLUS_EXPORT MacroArgumentReference
{
  unsigned _position;
  unsigned _length;

public:
  MacroArgumentReference(unsigned position = 0, unsigned length = 0)
    : _position(position), _length(length)
  { }

  unsigned position() const
  { return _position; }

  unsigned length() const
  { return _length; }
};

class CPLUSPLUS_EXPORT Client
{
  Client(const Client &other);
  void operator=(const Client &other);

public:
  enum IncludeType {
    IncludeLocal,
    IncludeGlobal
  };

public:
  Client();
  virtual ~Client();

  virtual void macroAdded(const Macro &macro) = 0;

  virtual void passedMacroDefinitionCheck(unsigned offset, const Macro &macro) = 0;
  virtual void failedMacroDefinitionCheck(unsigned offset, const QByteArray &name) = 0;

  virtual void startExpandingMacro(unsigned offset,
                                   const Macro &macro,
                                   const QByteArray &originalText,
                                   bool inCondition = false,
                                   const QVector<MacroArgumentReference> &actuals
                                            = QVector<MacroArgumentReference>()) = 0;

  virtual void stopExpandingMacro(unsigned offset,
                                  const Macro &macro) = 0;

  virtual void startSkippingBlocks(unsigned offset) = 0;
  virtual void stopSkippingBlocks(unsigned offset) = 0;

  virtual void sourceNeeded(QString &fileName, IncludeType mode,
                            unsigned line) = 0; // ### FIX the signature.
};

} // namespace CPlusPlus

#endif // CPLUSPLUS_PP_CLIENT_H
