Enum Tier 

#[repr(u8)]
pub enum Tier {
    Start = 0,
    Control = 1,
    Notification = 2,
    Value = 3,
    Settle = 4,
    Terminal = 5,
    Teardown = 6,
}

The 7-tier const table (D34, amends R-tier numbering).

Ordering encodes priority + batch timing: immediate (< Value) flows during the current wave; batch-deferred (>= Value) is held to the batch commit / wave boundary. PAUSE/RESUME sit below DIRTY (control before notification); PULL joins that existing control/demand tier (D269). START is the handshake type.

Variants

Start = 0

0 — subscribe handshake (START).

Control = 1

1 — control/demand (PAUSE / RESUME / PULL).

Notification = 2

2 — notification (DIRTY).

Value = 3

3 — value (DATA / RESOLVED).

Settle = 4

4 — settle (INVALIDATE).

Terminal = 5

5 — terminal (COMPLETE / ERROR).

Teardown = 6

6 — teardown (TEARDOWN).

Implementations

impl Tier

pub fn as_u8(self) -> u8

Updates or reads as_u8.

pub fn is_immediate(self) -> bool

Immediate tiers (< Value) propagate during the current wave (D34).

pub fn is_batch_deferred(self) -> bool

Batch-deferred tiers (>= Value) are held to the wave/batch boundary (D34).

pub fn is_pause_buffered(self) -> bool

Pause buffering holds the settle slice: value-tier DATA/RESOLVED plus INVALIDATE.

Trait Implementations

impl Clone for Tier

fn clone(&self) -> Tier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tier

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

Formats the value using the given formatter.

impl Hash for Tier

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 Tier

fn cmp(&self, other: &Tier) -> 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,

Restrict a value to a certain interval.

impl PartialEq for Tier

fn eq(&self, other: &Tier) -> 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 PartialOrd for Tier

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Copy for Tier

impl Eq for Tier

impl StructuralPartialEq for Tier