Method evaluate_node_set

src/include/pugixml.cpp:10123–10151

	}

	PUGI__FN xpath_node_set xpath_query::evaluate_node_set(const xpath_node& n) const
	{
		if (!_impl) return xpath_node_set();

		impl::xpath_ast_node* root = static_cast<impl::xpath_query_impl*>(_impl)->root;

		if (root->rettype() != xpath_type_node_set)
		{
		#ifdef PUGIXML_NO_EXCEPTIONS
			return xpath_node_set();
		#else
			xpath_parse_result res;
			res.error = "Expression does not evaluate to node set";

			throw xpath_exception(res);
		#endif
		}
		
		impl::xpath_context c(n, 1, 1);
		impl::xpath_stack_data sd;

	#ifdef PUGIXML_NO_EXCEPTIONS
		if (setjmp(sd.error_handler)) return xpath_node_set();
	#endif

		impl::xpath_node_set_raw r = root->eval_node_set(c, sd.stack);

		return xpath_node_set(r.begin(), r.end(), r.type());
	}

	PUGI__FN const xpath_parse_result& xpath_query::result() const
	{