matrix_entry_key.h

由matlab开发的hybrid系统的描述语言

/*
	HYSDEL
	Copyright (C) 1999-2002  Fabio D. Torrisi

	This file is part of HYSDEL.
    
	HYSDEL 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.

	HYSDEL 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 library; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

	CONTACT INFORMATION
	===================
	Fabio D. Torrisi
	ETH Zentrum
	Physikstrasse. 3 ETL,
	CH-8032 Zurich
	Switzerland
	mailto:[e-mail] (preferred)
*/

#ifndef D_MATRIX_ENTRY_KEY
#define D_MATRIX_ENTRY_KEY
#ifndef STD_NS
#define STD_NS
using namespace std;

#endif


class Matrix_entry_key {
public:
	/** STL wants Matrix_entry_key() */
	Matrix_entry_key() { }

	Matrix_entry_key(int iy, int ix) {
		y = iy;
		x = ix;
	}

	/** the comparison operator for STL::map
	 * the entries are sorted by increasing y, then by x */
	bool operator() (const Matrix_entry_key & earlier,
		const Matrix_entry_key & later) const {
			return (earlier.y < later.y) ||
				((earlier.y == later.y) &&
				(earlier.x < later.x));
	}

	int get_x() const { return x; }

	int get_y() const { return y; }

private:
	int y, x;
};

#endif // D_MATRIX_ENTRY_KEY