type>     {         template <typename OutputIterator, typename Context, typename Delimiter>         static bool         call(Component const& component, OutputIterator& sink           , Context& ctx, Delimiter const& d, Attribute const& attr, bool&)         { #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(0000))             component; // suppresses warning: C0000: 'component' : unreferenced formal parameter #endif             return c