Enum ExtensionError 

#[non_exhaustive]
pub enum ExtensionError {
    AlreadyRegistered {
        name: String,
    },
    NotFound {
        name: String,
    },
    InUse {
        name: String,
        strong_count: usize,
    },
    LockPoisoned,
}

Errors raised by ExtensionPoint operations.

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.

AlreadyRegistered

Tried to register a name that is already in use.

Fields

name: String

The conflicting name.

NotFound

Tried to unregister or replace a name that is not present.

Fields

name: String

The missing name.

InUse

Tried to unregister a name whose strong count is greater than one (i.e. external callers are still holding the Arc<T>).

Fields

name: String

The contended name.

strong_count: usize

Number of strong references observed at the time of the call.

LockPoisoned

Internal lock acquisition failed.

Trait Implementations

impl Debug for ExtensionError

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

Formats the value using the given formatter.

impl Display for ExtensionError

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

Formats the value using the given formatter.

impl Error for ExtensionError

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.