.. _exhale_struct_structrclcpp_1_1subscription__traits_1_1has__message__type:

Template Struct has_message_type
================================

- Defined in :ref:`file_include_rclcpp_subscription_traits.hpp`


Inheritance Relationships
-------------------------

Base Type
*********

- ``public rclcpp::subscription_traits::extract_message_type< rclcpp::function_traits::function_traits< CallbackT >::template argument_type< 0 > >`` (:ref:`exhale_struct_structrclcpp_1_1subscription__traits_1_1extract__message__type`)


Struct Documentation
--------------------


.. doxygenstruct:: rclcpp::subscription_traits::has_message_type
   :project: rclcpp Doxygen Project
   :members:
   :protected-members:
   :undoc-members: