Explicitly declare boost::placeholders usage

Boost 1.73 depreacated the implicit use of boost::placeholders.

franka_example_controllers/src/cartesian_impedance_example_controller.cpp

@@ -10,6 +10,8 @@
 #include <pluginlib/class_list_macros.h>
 #include <ros/ros.h>
 
+using namespace boost::placeholders;
+
 #include <franka_example_controllers/pseudo_inversion.h>
 
 namespace franka_example_controllers {

franka_example_controllers/src/dual_arm_cartesian_impedance_example_controller.cpp

@@ -18,6 +18,8 @@
 #include <tf/transform_listener.h>
 #include <tf_conversions/tf_eigen.h>
 
+using namespace boost::placeholders;
+
 namespace franka_example_controllers {
 
 bool DualArmCartesianImpedanceExampleController::initArm(

franka_example_controllers/src/force_example_controller.cpp

@@ -11,6 +11,8 @@
 
 #include <franka/robot_state.h>
 
+using namespace boost::placeholders;
+
 namespace franka_example_controllers {
 
 bool ForceExampleController::init(hardware_interface::RobotHW* robot_hw,

franka_example_controllers/src/teleop_gripper_node.cpp

@@ -17,6 +17,8 @@
 #include <memory>
 #include <mutex>
 
+using namespace boost::placeholders;
+
 using franka_gripper::GraspAction;
 using franka_gripper::HomingAction;
 using franka_gripper::MoveAction;

franka_example_controllers/src/teleop_joint_pd_example_controller.cpp

@@ -17,6 +17,7 @@
 #include <vector>
 
 using Vector7d = Eigen::Matrix<double, 7, 1>;
+using namespace boost::placeholders;
 
 const std::string kControllerName = "TeleopJointPDExampleController";
 

franka_gazebo/src/franka_gripper_sim.cpp

@@ -4,6 +4,8 @@
 #include <franka_gazebo/franka_gripper_sim.h>
 #include <pluginlib/class_list_macros.h>
 
+using namespace boost::placeholders;
+
 namespace franka_gazebo {
 
 using actionlib::SimpleActionServer;