.. _program_listing_file__tmp_ws_src_marti_messages_marti_dbw_msgs_include_marti_dbw_msgs_constants.h:

Program Listing for File constants.h
====================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_marti_messages_marti_dbw_msgs_include_marti_dbw_msgs_constants.h>` (``/tmp/ws/src/marti_messages/marti_dbw_msgs/include/marti_dbw_msgs/constants.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef MARTI_DBW_MSGS_DBW_CONSTANTS_H_
   #define MARTI_DBW_MSGS_DBW_CONSTANTS_H_
   
   namespace marti_dbw_msgs
   {
   // This file includes constants used in the marti_dbw_msgs ROS
   // messages.
   //
   // This approach goes against the ROS convention of defining constants
   // in messages (Although there is precendent for this approach.  e.g,
   // sensor_msgs/image_encodings.h).  By keeping constants in a separate
   // header file, we can add new constants without changing the identity
   // of the message (ie, the md5sum).  This will hopefully reduce
   // development friction overall by allowing us to easily add new
   // states as necessary without having to convert old bag files.
   
   // Transmission ranges
   
   // The unknown range is only valid as feedback. It should not be sent as a control.
   const std::string TRANS_UNKNOWN = "unknown";
   
   const std::string TRANS_PARK = "park";
   const std::string TRANS_NEUTRAL = "neutral";
   const std::string TRANS_REVERSE = "reverse";
   const std::string TRANS_DRIVE_LOW = "drive_low";
   const std::string TRANS_DRIVE_HIGH = "drive_high";
   const std::string TRANS_PIVOT = "pivot";
   
   
   
   // Turn signal states
   
   const std::string TURN_SIGNAL_UNKNOWN = "unknown";
   const std::string TURN_SIGNAL_OFF = "off";
   const std::string TURN_SIGNAL_LEFT = "left";
   const std::string TURN_SIGNAL_RIGHT = "right";
   const std::string TURN_SIGNAL_HAZARDS = "hazards";
   }
   #endif  // MARTI_DBW_MSGS_DBW_CONSTANTS_H_