Enum EphemeronMutationError 

pub enum EphemeronMutationError {
    Allocation(EdgeAllocationError),
    UnknownEdge(EdgeId),
    WrongKind {
        edge: EdgeId,
        actual: EdgeKind,
    },
    EntryChanged {
        expected_key: ManagedId,
        expected_value: ManagedId,
        actual_key: ManagedId,
        actual_value: ManagedId,
    },
}

A failed checked mutation of an ephemeron entry.

Variants

Allocation(EdgeAllocationError)

Allocating a stable identity for a new entry failed.

UnknownEdge(EdgeId)

The requested identity is not a live ephemeron entry of this node.

WrongKind

The identity is live, but has different collection semantics.

Fields

edge: EdgeId

Live edge identity supplied by the caller.

actual: EdgeKind

Actual immutable edge kind.

EntryChanged

The entry exists, but no longer contains the caller’s expected pair.

Fields

expected_key: ManagedId

Key supplied by the caller as the mutation precondition.

expected_value: ManagedId

Value supplied by the caller as the mutation precondition.

actual_key: ManagedId

Current key, which was left unchanged.

actual_value: ManagedId

Current value, which was left unchanged.

Trait Implementations

impl Clone for EphemeronMutationError

fn clone(&self) -> EphemeronMutationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EphemeronMutationError

impl Debug for EphemeronMutationError

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

Formats the value using the given formatter.

impl Display for EphemeronMutationError

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

Formats the value using the given formatter.

impl Eq for EphemeronMutationError

impl Error for EphemeronMutationError

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<EdgeAllocationError> for EphemeronMutationError

fn from(error: EdgeAllocationError) -> Self

Converts to this type from the input type.

impl PartialEq for EphemeronMutationError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EphemeronMutationError