Struct GoalId 

pub struct GoalId {
    pub uuid: [u8; 16],
}

Unique identifier for a goal

This is a 128-bit UUID matching unique_identifier_msgs/msg/UUID.

Fields

uuid: [u8; 16]

UUID bytes in standard format

Implementations

impl GoalId

pub const UUID_LEN: usize = 16

Length of the goal UUID in bytes (ROS 2 unique_identifier_msgs/UUID).

pub const SEQ_PREFIX_LEN: usize = 0

Length of any CDR length-prefix preceding the goal UUID bytes — zero.

ROS 2 carries the goal id as unique_identifier_msgs/UUID, a fixed uint8[16] array; CDR fixed arrays have no length prefix, so the goal UUID sits directly after the CDR header. Pre-233.6 the action framing wrote a u32(16) sequence prefix here (this const was 4), which self-matched nano-ros peers but added 4 bytes a real rcl_action peer rejects. Kept as a named 0 (rather than deleted) so the C/C++/Cyclone framing calcs that read CDR_HEADER_LEN + SEQ_PREFIX_LEN + UUID_LEN stay correct after the migration.

pub const fn new(uuid: [u8; 16]) -> GoalId

Create a new GoalId from UUID bytes

pub const fn zero() -> GoalId

Create a zero/null GoalId

pub fn is_zero(&self) -> bool

Check if this is a zero/null GoalId

pub fn from_counter(counter: u64) -> GoalId

Create a GoalId from a simple counter (for testing/embedded use)

This creates a deterministic UUID-like identifier from a counter value. Not a true UUID, but useful for embedded systems without random number generators.

Trait Implementations

impl Clone for GoalId

fn clone(&self) -> GoalId

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GoalId

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for GoalId

fn default() -> GoalId

Returns the “default value” for a type.

impl Deserialize for GoalId

fn deserialize(reader: &mut CdrReader<'_>) -> Result<GoalId, DeserError>

Deserialize a value from the CDR reader

impl Display for GoalId

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Hash for GoalId

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for GoalId

fn eq(&self, other: &GoalId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for GoalId

fn serialize(&self, writer: &mut CdrWriter<'_>) -> Result<(), SerError>

Serialize this value to the CDR writer

impl Copy for GoalId

impl Eq for GoalId

impl StructuralPartialEq for GoalId