Enum Error 

#[non_exhaustive]
pub enum Error {
    Stale(CellId),
    StaleText(TextId),
    TooLong {
        len: usize,
        max: usize,
    },
    BufferTooSmall {
        required: usize,
        available: usize,
    },
    Corrupt(String),
    TypeMismatch {
        id: CellId,
        expected: &'static str,
        found: &'static str,
    },
    Overflow,
    WakeExhausted,
    Contended,
    RevisionExhausted,
    OwnerExhausted,
    Full {
        capacity: usize,
    },
    Malformed(String),
    Io(Error),
}

Additions are expected: a cause discovered later lands here rather than in a new major version, so a caller matches what it handles and leaves the rest to a catch-all.

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.

Stale(CellId)

The id names a slot nothing occupies, or a generation that has been released since the id was minted.

StaleText(TextId)

The same, for a text cell.

TooLong

The text would not fit the cell; nothing was written.

Fields

len: usize

max: usize

BufferTooSmall

The caller’s read buffer cannot hold the validated text snapshot.

Fields

required: usize

available: usize

Corrupt(String)

A text cell held bytes that are not UTF-8: something wrote past the contract.

TypeMismatch

The id names a live cell of another type.

Fields

id: CellId

expected: &'static str

found: &'static str

Overflow

The update would leave the integer range.

WakeExhausted

The native parking generation reached its limit. Value access still works; release and reallocate to obtain a new parking generation.

Contended

A bounded text read raced bank reuse, or another live writer holds the cell. The operation does not spin or wait for that writer.

RevisionExhausted

The full-width text publication sequence cannot advance without ABA.

OwnerExhausted

A text owner row cannot mint another distinct incarnation.

Full

No slot is reusable: slots may be live, pinned after release, or have exhausted their generation range.

Fields

capacity: usize

Malformed(String)

The text is not a cell id.

Io(Error)

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 Error

fn from(value: Error) -> Error

Converts to this type from the input type.