Enum AppendError 

#[non_exhaustive]
pub enum AppendError<E> {
    Conflict {
        stream_id: ErrorId,
        expected: Option<Version>,
        actual: Option<Version>,
    },
    Store(E),
}

Structured error from RawEventStore::append.

Separates concurrency conflicts (a normal, expected condition in optimistic concurrency) from adapter-level failures (I/O, connection). This lets the EventStore facade map conflicts to StoreError::Conflict without opaque wrapping.

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.

Conflict

Optimistic concurrency conflict — expected version doesn’t match.

Fields

stream_id: ErrorId

expected: Option<Version>

actual: Option<Version>

Store(E)

Adapter-level failure (I/O, serialization, connection, etc.).

Trait Implementations

impl<E: Debug> Debug for AppendError<E>

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

Formats the value using the given formatter.

impl<E> Display for AppendError<E>

where E: Display,

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

Formats the value using the given formatter.

impl<E> Error for AppendError<E>

where E: Error + 'static, Self: Debug + Display,

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.