Forward a query to the underlying executor.
template< typename Property> constraint< can_query< const Executor &, Property >::value, typename conditional< is_convertible< Property, execution::blocking_t >::value, execution::blocking_t, typename query_result< const Executor &, Property >::type >::type >::type query( const Property & p) const;
Do not call this function directly. It is intended for use with the query
customisation point.
For example:
asio::strand<my_executor_type> ex = ...; if (asio::query(ex, asio::execution::blocking) == asio::execution::blocking.never) ...