exception.hh

来自「用于计算矩阵的特征值,及矩阵的其他运算.可以用与稀疏矩阵」· HH 代码 · 共 58 行

// Copyright (C) 2002 David R. Martin <[e-mail]>
//
// This program 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.
// 
// This program 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, or see http://www.gnu.org/copyleft/gpl.html.

#ifndef EXCEPTION_HH
#define EXCEPTION_HH

#include <iostream>

namespace Util
{
  // A simple exception class that contains an error message.

  class Exception {
    public:

      // Always construct exception with a message, so we can print
      // a useful error/log message.
      Exception(const char *msg);

      // We need to implement the copy constructor so that rethrowing
      // works.
      Exception(const Exception & that);

       virtual ~ Exception();

      // Retrieve the message that this exception carries.
      virtual const char *msg() const;

    protected:

      char *_msg;

  };

  // write to output stream
  inline std::ostream & operator<<(std::ostream & out, const Exception & e)
  {
      out << e.msg();
      return out;
  }
}

#endif                          // __Exception_h__