Enum StrongEdgeMutationError 

pub enum StrongEdgeMutationError {
    Allocation(EdgeAllocationError),
    UnknownEdge(EdgeId),
    WrongKind {
        edge: EdgeId,
        actual: EdgeKind,
    },
    TargetChanged {
        expected: ManagedId,
        actual: ManagedId,
    },
}

A failed checked mutation of a strong edge.

Variants

Allocation(EdgeAllocationError)

Allocating a stable identity for a new edge failed.

UnknownEdge(EdgeId)

The requested identity is not a live strong edge 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.

TargetChanged

The edge exists, but no longer names the caller’s expected target.

Fields

expected: ManagedId

Target supplied by the caller as the mutation precondition.

actual: ManagedId

Current target, which was left unchanged.

Trait Implementations

impl Clone for StrongEdgeMutationError

fn clone(&self) -> StrongEdgeMutationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for StrongEdgeMutationError

impl Debug for StrongEdgeMutationError

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

Formats the value using the given formatter.

impl Display for StrongEdgeMutationError

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

Formats the value using the given formatter.

impl Eq for StrongEdgeMutationError

impl Error for StrongEdgeMutationError

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 StrongEdgeMutationError

fn from(error: EdgeAllocationError) -> Self

Converts to this type from the input type.

impl PartialEq for StrongEdgeMutationError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StrongEdgeMutationError