//------------------------------------------------------------------------------
// 
// This file is part of Toolkit for Conceptual Modeling (TCM).
// (c) copyright 1999, Vrije Universiteit Amsterdam.
// Author: Frank Dehne (frank@cs.vu.nl).
//
// TCM 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.
//
// TCM 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 TCM; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//-----------------------------------------------------------------------------
#ifndef _SEQUENCE_H
#define _SEQUENCE_H

/// Class that helps to generate unique numbers (unsigned longs).
class Sequence {
/*@Doc: {\large {\bf scope:} global} */
public:
	///
	Sequence(unsigned long starts_with = 0);
	///
	void Set(unsigned long num) {seq = num;}
	///
	unsigned long Get() {return seq;}
	///
	unsigned long GetNext(); 
	///
	void Reset() {seq = start;}
private:
	///
	unsigned long seq;
	///
	unsigned long start;
};
#endif