static boost::python::tuple
getstate(const rule_type& r)
{
boost::python::list syms;
rule_type::symbolizers::const_iterator begin = r.get_symbolizers().begin();
rule_type::symbolizers::const_iterator end = r.get_symbolizers().end();
pickle_symbolizer serializer( syms );
std::for_each( begin, end , boost::apply_visitor( serializer ));
// We serialize filter expressions AST as strings
std::string filter_expr = to_expression_string(*r.get_filter());
return boost::python::make_tuple(r.get_abstract(),filter_expr,r.has_else_filter(),syms);
}
