Enum LoadWithError 

#[non_exhaustive]
pub enum LoadWithError<A, EncErr, DecErr, UpErr> {
    Store(StoreError<A, EncErr, DecErr>),
    Upcast(UpErr),
}

Errors from the with-upcaster load path.

Returned by EventStore::load_with. Wraps the four error sources StoreError already carries plus the user-supplied upcast function’s error type.

LoadWithError<A, EncErr, DecErr, UpErr> is structurally StoreError + Upcast(UpErr). The From<StoreError<A, EncErr, DecErr>> impl lets the ? operator promote a StoreError into the wider variant inside a load_with body without manual matching.

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.

Store(StoreError<A, EncErr, DecErr>)

All non-upcast errors — wrapped verbatim from the no-upcaster path.

Upcast(UpErr)

Upcast function failure — carries the user-supplied error verbatim. No wrapper is applied; encode diagnostic context (event type, schema version) in your own error type if needed.

Trait Implementations

impl<A: Debug, EncErr: Debug, DecErr: Debug, UpErr: Debug> Debug for LoadWithError<A, EncErr, DecErr, UpErr>

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

Formats the value using the given formatter.

impl<A, EncErr, DecErr, UpErr> Display for LoadWithError<A, EncErr, DecErr, UpErr>

where StoreError<A, EncErr, DecErr>: Display, UpErr: Display,

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

Formats the value using the given formatter.

impl<A, EncErr, DecErr, UpErr> Error for LoadWithError<A, EncErr, DecErr, UpErr>

where StoreError<A, EncErr, DecErr>: Error, UpErr: 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.

impl<A, EncErr, DecErr, UpErr> From<KernelError> for LoadWithError<A, EncErr, DecErr, UpErr>

fn from(err: KernelError) -> Self

Converts to this type from the input type.

impl<A, EncErr, DecErr, UpErr> From<StoreError<A, EncErr, DecErr>> for LoadWithError<A, EncErr, DecErr, UpErr>

fn from(source: StoreError<A, EncErr, DecErr>) -> Self

Converts to this type from the input type.