Function defer

include/boost/asio/inline_or_executor.hpp:478–481

   */
  template <typename Function, typename Allocator>
  void defer(Function&& f, const Allocator& a) const
  {
    executor_.defer(static_cast<Function&&>(f), a);
  }
#endif // !defined(BOOST_ASIO_NO_TS_EXECUTORS)

  /// Compare two inline_or_executors for equality.