MCThrow.h

#if !defined(__MCTHROW_H_)
#define __MCTHROW_H_

#ident "@(#)$Id: MCThrow.h,v 1.5 2004/12/02 07:05:20 mike Exp $"

/*
 * Copyright Miba Consulting Ltd. (c) 2000-2003
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser 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
 *
 */

#include "mcllib/MCExcept.h"
#include "mcllib/MCStringStream.h"

namespace mcllib
{
    template<typename MCEXT> class MCThrowWrapper : public MCEXT
    {
    public:
        MCThrowWrapper(const MCEXT& ex) : MCEXT(ex) { }
        MCThrowWrapper(const MCEXT& ex, const char* file, int line)
            : MCEXT(ex)
        {
            setFileLine(file, line);
        }
        inline MCEXT& operator+=(const MCStringStream& mcss)
        {
            complete(mcss);
            return(*this);
        }
    };

    template<typename MCEXT>
    MCThrowWrapper<MCEXT>
    MCExceptMaker(const MCEXT& ex, const char* file, int line) 
    {
        if (ex.getMsg().hasSrc()) {
            // Ignore the new file/line information (preserve the existing)
            return(MCThrowWrapper<MCEXT>(ex));
        } else {
            // Doesn't have file/line information, so incorporate it
            return(MCThrowWrapper<MCEXT>(ex, file, line));
        }
    }
    MCThrowWrapper<mcllib::MCExcept>
    MCExceptMaker(const char* msg, const char* file, int line); 
};

#define MCThrow(ex) MCThrowFileLine((ex), __FILE__, __LINE__)

#define MCThrowFileLine(ex, file, line) \
    throw mcllib::MCExceptMaker((ex), (file), (line)) \
        += mcllib::MCStringStream()

#endif

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