Enum EvalError 

pub enum EvalError {
    Timeout,
    Unavailable(String),
    Failed(String),
}

Why an evaluator could not produce an Outcome.

A PolicyTree’s evaluation treats any EvalError as a refusal of the subject it was judging — fail-closed, scoped to exactly the writes that evaluator was asked about. It never escalates an error into Outcome::Freeze on its own: freezing an account is a judgement about the account, not a side effect of infrastructure being unavailable.

Variants

Timeout

The evaluator did not answer within its caller-enforced deadline.

Unavailable(String)

The evaluator’s view is more than Staleness::BestEffort’s max_lag behind, or it could not be reached at all.

Failed(String)

The evaluator was reached and answered, but the answer was not a verdict — a crash, a malformed response, an internal invariant it caught itself violating.

Trait Implementations

impl Clone for EvalError

fn clone(&self) -> EvalError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvalError

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

Formats the value using the given formatter.

impl Display for EvalError

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

Formats the value using the given formatter.

impl Error for EvalError

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 PartialEq for EvalError

fn eq(&self, other: &EvalError) -> 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 Eq for EvalError

impl StructuralPartialEq for EvalError