Enum TimerError 

#[non_exhaustive]
pub enum TimerError {
    NotInitialized,
    RuntimeBusy,
    Register(RegisterError),
    Schedule(ScheduleError),
    RegistrationExpired,
    ControlFailure(TimerControlFailure),
    OwnershipInvariant,
    ReconciliationConflict,
}

Failure from the canister-local timer runtime API.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

NotInitialized

The lifecycle owner has not initialized the volatile runtime.

RuntimeBusy

A nested internal borrow indicates unsupported re-entrancy.

Register(RegisterError)

Claiming one canonical timer identity failed.

Schedule(ScheduleError)

Cadence or deadline validation failed.

RegistrationExpired

The logical registration was removed or superseded.

ControlFailure(TimerControlFailure)

Pure checked control reached a terminal failure after effects were applied.

OwnershipInvariant

Canonical callback or provider-handle ownership was internally inconsistent.

ReconciliationConflict

A retained lifecycle claim no longer matches its canonical declaration.

Trait Implementations

impl Debug for TimerError

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

Formats the value using the given formatter.

impl Display for TimerError

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

Formats the value using the given formatter.

impl Error for TimerError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<RegisterError> for TimerError

fn from(source: RegisterError) -> Self

Converts to this type from the input type.

impl From<ScheduleError> for TimerError

fn from(source: ScheduleError) -> Self

Converts to this type from the input type.