gexception.h

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//
// Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.net>
// 
// 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 3 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, see <http://www.gnu.org/licenses/>.
// ===

#ifndef G_EXCEPTION_H
#define G_EXCEPTION_H

#include "gdef.h"
#include <string>
#include <iostream>

namespace G
{
        class Exception ;
}

class G::Exception : public std::exception 
{
protected:
        std::string m_what ;

public:
        Exception() ;

        explicit Exception( const char * what ) ;

        explicit Exception( const std::string & what ) ;

        Exception( const char * what , const std::string & more ) ;

        Exception( const std::string & what , const std::string & more ) ;

        Exception( const std::string & what , const std::string & more1 , const std::string & more2 ) ;

        virtual ~Exception() throw() ;

        virtual const char * what() const throw() ;

        void prepend( const char * context ) ;

        void append( const char * more ) ;

        void append( const std::string & more ) ;
} ;

#define G_EXCEPTION_CLASS( class_name , description ) class class_name : public G::Exception { public: class_name() : G::Exception(description) {} explicit class_name(const char *more) : G::Exception(description,more) {} explicit class_name(const std::string &more) : G::Exception(description,more) {} class_name(const std::string &more1,const std::string &more2) : G::Exception(description,more1,more2) {} }

#ifdef USE_SMALL_EXCEPTIONS
 #define G_EXCEPTION( fn_name , description ) static inline int fn_name() { throw G::Exception(description) ; return 0 ; } static inline int fn_name( const std::string & more ) { throw G::Exception(description,more) ; return 0 ; }
#else
 #define G_EXCEPTION( class_name , description ) G_EXCEPTION_CLASS( class_name , description )
#endif

#endif