Robotics.ROS.Msg.Class

ROS message type class declaration.

Documentation

class Binary a => Message a where

Haskell native type for ROS message language described data structure. Serialization guaranted by Binary super class. And no more is needed for transfer over socket.

Minimal complete definition

getType, getSource, getDigest

Methods

getType :: a -> Text

Get message type string, e.g. std_msgs/Char

getSource :: a -> Text

Get message source

getDigest :: a -> MD5Digest

Get recurrent MD5 of message source

class Message a => Stamped a where

Sometime ROS messages have a special Header field. It used for tracking package sequence, time stamping and frame tagging. Headers is frequently field. The Stamped type class lifts header fields on the top of message and abstracting of type.

Minimal complete definition

getSequence, setSequence, getStamp, getFrame

Methods

getSequence :: a -> Word32

Get sequence number

setSequence :: Word32 -> a -> a

Set sequence number

getStamp :: a -> ROSTime

Get timestamp of message

getFrame :: a -> ByteString

Get frame of message