[boost] Proposal for throw_exception.hpp

From: Robert Ramey (ramey_at_[hidden])
Date: 2004-01-02 13:04:46

Could we not consider augmenting throw_exception.hpp to
something like the following?  Is there any reason why this
wouldn't be a good idea?

#include <boost/config.hpp>

#ifdef BOOST_NO_EXCEPTIONS
# include <exception>
#endif

namespace boost {

#ifdef BOOST_NO_EXCEPTIONS
    // user defined
    void throw_exception(std::exception const & e); 
    void throw_exception();
    } // namespace boost
    #define BOOST_TRY
    #define BOOST_CATCH(x) if(0)
#else
    template<class E> void throw_exception(E const & e)
    {
        throw e;
    }
    inline void throw_exception()
    {
        throw;
    }
    #define BOOST_TRY try
    #define BOOST_CATCH(x) catch(x)
#endif

} // namespace boost

This would permit me me to do the following:

template<class Archive>
void D::load(Archive & ar, const unsigned int file_version)
{
    BOOST_TRY {
        ar >> boost::serialization::make_nvp("b", b1);
        ar >> boost::serialization::make_nvp("b", b2);
    }
    BOOST_CATCH (...){
        // eliminate invalid pointers
        b1 = NULL;
        b2 = NULL;
        boost::throw_exception();
    }
    // check that loading was correct
    BOOST_CHECK(b1 == b2);
}

Robert Ramey