Enum IncrementalError 

pub enum IncrementalError<K> {
    UnknownQuery {
        key: K,
    },
    Cycle {
        path: Vec<K>,
    },
    BudgetExceeded {
        kind: BudgetKind,
        limit: usize,
        consumed: usize,
        continuation: Option<ContinuationToken>,
    },
    Cancelled,
    UnknownContinuation {
        token: ContinuationToken,
    },
}

A typed query verification failure.

Variants

UnknownQuery

No query was registered for the requested key.

Fields

key: K

The missing query key.

Cycle

Query execution attempted to re-enter a key already on the stack.

Fields

path: Vec<K>

The cycle path, including the repeated key at the end.

BudgetExceeded

A configured budget was exhausted.

Fields

kind: BudgetKind

The exhausted budget class.

limit: usize

The configured limit.

consumed: usize

The consumed amount at the failure point.

continuation: Option<ContinuationToken>

A token that resumes the owning root query.

Cancelled

Query code requested cancellation.

UnknownContinuation

A continuation token was not known to this engine.

Fields

token: ContinuationToken

The rejected token.

Implementations

impl<K> IncrementalError<K>

pub fn continuation(&self) -> Option<ContinuationToken>

Returns the continuation token carried by a budget error, when present.

Trait Implementations

impl<K: Clone> Clone for IncrementalError<K>

fn clone(&self) -> IncrementalError<K>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: Debug> Debug for IncrementalError<K>

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

Formats the value using the given formatter.

impl<K: Debug> Display for IncrementalError<K>

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

Formats the value using the given formatter.

impl<K: Eq> Eq for IncrementalError<K>

impl<K: Debug> Error for IncrementalError<K>

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<K: PartialEq> PartialEq for IncrementalError<K>

fn eq(&self, other: &IncrementalError<K>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<K: PartialEq> StructuralPartialEq for IncrementalError<K>