Enum ScaleError 

#[non_exhaustive]
pub enum ScaleError {
    HopLimitExceeded {
        hops: usize,
        max: usize,
    },
    WorkerToWorker,
    CycleDetected {
        parent: String,
        child: String,
    },
}

Errors raised by the scale-guard components.

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.

HopLimitExceeded

A delegation chain exceeded the configured hop limit.

Fields

hops: usize

The delegation depth at which the limit was hit.

max: usize

The configured maximum delegation depth.

WorkerToWorker

A worker tried to delegate (Worker↔Worker fan-out is forbidden).

CycleDetected

Linking a task edge would create a cycle in the global task graph.

Fields

parent: String

The parent task attempting the delegation.

child: String

The child task that would create the cycle.

Trait Implementations

impl Debug for ScaleError

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

Formats the value using the given formatter.

impl Display for ScaleError

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

Formats the value using the given formatter.

impl Error for ScaleError

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.