/* This file is part of KDevelop
    Copyright 2008 David Nolden<david.nolden.kdevelop@art-master.de>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License version 2 as published by the Free Software Foundation.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef ALIASDECLARATION_H
#define ALIASDECLARATION_H

#include "classmemberdeclaration.h"
#include "classmemberdeclarationdata.h"
#include "duchainpointer.h"
#include "declarationdata.h"

namespace KDevelop
{
class KDEVPLATFORMLANGUAGE_EXPORT AliasDeclarationData : public ClassMemberDeclarationData
{
public:
  AliasDeclarationData() {}
  AliasDeclarationData( const AliasDeclarationData& rhs )
      : ClassMemberDeclarationData( rhs )
  {
    m_aliasedDeclaration = rhs.m_aliasedDeclaration;
  }
  IndexedDeclaration m_aliasedDeclaration;
};
/**
 * An alias declaration maps one declaration to another.
 * While searching in the duchain, an AliasDeclaration is transparently
 * replaced by its aliased declaration.
 */
class KDEVPLATFORMLANGUAGE_EXPORT AliasDeclaration : public ClassMemberDeclaration
{
public:
  /// Copy constructor \param rhs declaration to copy
  AliasDeclaration(const AliasDeclaration& rhs);
  /**
   * Constructs an AliasDeclaration. The default value for isNamespaceAlias is true.
   *
   * \param url url of the document where this occurred
   * \param range range of the alias declaration's identifier
   * \param context context in which this declaration occurred
   */
  AliasDeclaration(const RangeInRevision& range, DUContext* context);
  
  AliasDeclaration(AliasDeclarationData& data);
  /// Destructor
  virtual ~AliasDeclaration();

  /**
   * An AliasDeclaration cannot have a type, so setAbstractType does nothing here.
   *
   * \param type ignored type
   */
  virtual void setAbstractType(AbstractType::Ptr type);

  /**
   * Set the declaration that is aliased by this declaration.
   *
   * \param decl the declaration that this declaration references
   */
  void setAliasedDeclaration(const IndexedDeclaration& decl);

  /**
   * Access the declaration that is aliased by this declaration.
   *
   * \returns the aliased declaration
   */
  IndexedDeclaration aliasedDeclaration() const;

  virtual QString toString() const;

  enum {
    Identity = 6
  };
  
private:
  virtual Declaration* clonePrivate() const;
  DUCHAIN_DECLARE_DATA(AliasDeclaration)
};
}

#endif // FUNCTIONDECLARATION_H

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