UnitError.h

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/* Copyright (C) 2010, Bernd Speiser */
/* This file is part of Quantity.

Quantity is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

Quantity 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 General Public License for more details.
  
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/

#ifndef _UnitError_h
#define _UnitError_h

//STL includes
#include <string>

namespace unit
{

//
//  exception classes
//


class UnitError
{
public:
  UnitError( const std::string& message )
    : _message( message )
  {}
  virtual ~UnitError(){}
  
  virtual std::string message() const
  {
    return _message;
  }


protected:
  std::string _message;

};


class UnitMismatch : public UnitError
{
private:
  static const std::string UNIT_MISMATCH;

public:

  UnitMismatch (void) : UnitError (UNIT_MISMATCH) {}


  UnitMismatch (const std::string message) : UnitError (message) {}
};


class UnitInputError : public UnitError
{
private:
  static const std::string INPUT_ERROR;

public:

  UnitInputError (void) : UnitError (INPUT_ERROR) {}


  UnitInputError (const std::string message) : UnitError (message) {}
};


class UnitSyntaxError : public UnitError
{
private:
  static const std::string INPUT_ERROR;

public:

  UnitSyntaxError (void) : UnitError (INPUT_ERROR) {}


  UnitSyntaxError (const std::string message) : UnitError (message) {}
};

} // namespace unit

#endif // _UnitError_h

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