Struct gcore::MessageId

pub struct MessageId(pub [u8; 32]);

Message identifier.

Gear allows users and programs to interact with other users and programs via messages. Each message has its unique 256-bit identifier. The MessageId struct represents this identifier. One can get the message identifier for the currently processing message using the msg::id function. Also, each send and reply functions return a message identifier.

Examples

use gcore::msg;

#[no_mangle]
extern "C" fn handle() {
    let current_message_id = msg::id();
}

Tuple Fields

0: [u8; 32]

Implementations

impl MessageId

pub const fn zero() -> Self

Create an empty MessageId.

pub fn from_slice(slice: &[u8]) -> Self

Create a new MessageId from the 32-byte slice.

Panics

Panics if the supplied slice length is other than 32.

pub const fn as_slice(&self) -> &[u8]

Get MessageId represented as a slice of u8.

Trait Implementations

impl Clone for MessageId

fn clone(&self) -> MessageId

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MessageId

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

Formats the value using the given formatter.

impl Default for MessageId

fn default() -> MessageId

Returns the “default value” for a type.

impl Hash for MessageId

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

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 Ord for MessageId

fn cmp(&self, other: &MessageId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for MessageId

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for MessageId

fn partial_cmp(&self, other: &MessageId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for MessageId

impl Eq for MessageId

impl StructuralEq for MessageId

impl StructuralPartialEq for MessageId