Enum TrialState 

pub enum TrialState {
    Waiting,
    Running,
    Paused,
    Complete,
    Pruned,
    Failed,
}

Where a trial is in its life cycle.

Variants

Waiting

Created, not yet picked up by a worker.

Running

A worker is evaluating it.

Paused

Suspended by a scheduler, with a checkpoint reference; may resume.

Declared in M1 and legal in the state machine, but no built-in scheduler produces it before M4 (PBT/PASHA) — the state exists now so that storage backends and journal formats do not need a breaking change later.

Complete

Finished successfully; values hold the objective.

Pruned

Stopped early by a scheduler; the last intermediate value is the objective.

Failed

Stopped by an error; error holds the reason.

Implementations

impl TrialState

pub const fn is_finished(self) -> bool

true for the terminal states: Complete, Pruned, Failed.

Finished trials are immutable.

pub const fn is_active(self) -> bool

true if a worker is expected to be making progress on the trial.

Paused counts as active but not progressing: it is not finished and it still owns its checkpoint, so it is not is_active.

pub const fn can_transition_to(self, next: Self) -> bool

Whether self -> next is a legal transition.

From	To
Waiting	Running, Failed
Running	Complete, Pruned, Paused, Failed, Waiting
Paused	Running, Pruned, Failed
terminal	—

Running -> Waiting is legal but unused in-tree: stale-worker fail-over (fail_over_stale) moves the trial to Failed and, when the policy requeues, creates a replacement trial instead of returning the original to the pool. A transition to the same state is never legal — the caller has already lost the race (see Storage::try_transition).

Trait Implementations

impl Clone for TrialState

fn clone(&self) -> TrialState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TrialState

impl Debug for TrialState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TrialState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for TrialState

impl Hash for TrialState

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 TrialState

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

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for TrialState

fn partial_cmp(&self, other: &TrialState) -> 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 Serialize for TrialState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TrialState