Enum PreconditionError 

pub enum PreconditionError {
    Required,
    Conflict(ConcurrencyConflict),
}

Why a guarded write’s Precondition did not pass.

Variants

Required

The precondition pinned no prior state (empty If-Match/generation) on a path where pinning is mandatory — 428 Precondition Required.

Conflict(ConcurrencyConflict)

The pinned state is stale — 412 Precondition Failed.

Trait Implementations

impl Clone for PreconditionError

fn clone(&self) -> PreconditionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PreconditionError

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

Formats the value using the given formatter.

impl Display for PreconditionError

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

Formats the value using the given formatter.

impl Eq for PreconditionError

impl Error for PreconditionError

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<PreconditionError> for RemoteStoreError

fn from(err: PreconditionError) -> Self

Converts to this type from the input type.

impl PartialEq for PreconditionError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for PreconditionError