Function exception

extern/boost/boost/exception/exception.hpp:271–278

On HP aCC, this protected copy constructor prevents throwing boost::exception. On all other platforms, the same effect is achieved by the pure virtual destructor.

        //On HP aCC, this protected copy constructor prevents throwing boost::exception.
        //On all other platforms, the same effect is achieved by the pure virtual destructor.
        exception( exception const & x ) BOOST_NOEXCEPT_OR_NOTHROW:
            data_(x.data_),
            throw_function_(x.throw_function_),
            throw_file_(x.throw_file_),
            throw_line_(x.throw_line_),
            throw_column_(x.throw_column_)
            {
            }
#endif

        virtual ~exception() BOOST_NOEXCEPT_OR_NOTHROW