Use forward declaration for ParamListener

Author: saikishor

controller_manager/include/controller_manager/controller_manager.hpp

@@ -48,10 +48,9 @@
 #include "rclcpp/node.hpp"
 #include "std_msgs/msg/string.hpp"
 
-#include "controller_manager_parameters.hpp"
-
 namespace controller_manager
 {
+class ParamListener;
 using ControllersListIterator = std::vector<controller_manager::ControllerSpec>::const_iterator;
 
 CONTROLLER_MANAGER_PUBLIC rclcpp::NodeOptions get_cm_node_options();

controller_manager/src/controller_manager.cpp

@@ -28,6 +28,8 @@
 #include "rclcpp/version.h"
 #include "rclcpp_lifecycle/state.hpp"
 
+#include "controller_manager_parameters.hpp"
+
 namespace  // utility
 {
 static constexpr const char * kControllerInterfaceNamespace = "controller_interface";