Enum KvError 

#[non_exhaustive]
pub enum KvError {
    Io(Error),
    Decode(Error),
    InvalidKey(String),
    ValueTooLong {
        key: String,
        len: usize,
    },
    FutureVersion(u32),
}

Error type returned by this module.

#[non_exhaustive]: shep-core is a published library and this enum is reachable from it, so a further failure shape — a store whose size exceeded a future cap, say — must not break an out-of-tree consumer’s match (IR-20).

Wraps io::Error/serde_json::Error directly rather than stringifying them, matching BarkError, so callers keep the underlying diagnostic through core::error::Error::source — at the cost, documented there too, of not deriving Clone/PartialEq/Eq (IR-19’s exception for variants wrapping io::Error).

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.

Io(Error)

The store could not be read, written, or replaced.

Decode(Error)

The store’s JSON could not be parsed.

Refused rather than repaired: unlike barks.jsonl, which is read during an incident and so forgives a bad line, this file is a map an operator wrote and a partial read of it would silently drop keys that are still on disk.

InvalidKey(String)

A key outside the grammar; carries it verbatim so the message can quote what was typed.

ValueTooLong

A value over MAX_VALUE_BYTES.

Fields

key: String

The key it was being stored under.

len: usize

Its length in bytes.

FutureVersion(u32)

The store on disk is a version this build does not understand; carries that version. Nothing was written.

Trait Implementations

impl Debug for KvError

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

Formats the value using the given formatter.

impl Display for KvError

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

Formats the value using the given formatter.

impl Error for KvError

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<Error> for KvError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for KvError

fn from(source: Error) -> Self

Converts to this type from the input type.