Enum BackendError 

pub enum BackendError {
    Disconnected,
    Backend(String),
}

A failure raised by the HID backend beneath the HID++ channel layer.

Deliberately narrow. The only distinction anything above the transport branches on is “the device is gone” versus everything else, so a backend collapses its own error taxonomy into these two variants and every caller stays backend-agnostic.

Variants

Disconnected

The device is unreachable — it vanished after being opened, or was already gone when the open was attempted.

The two are one case here: nothing in the crate treats them differently, and a backend cannot always tell them apart.

Backend(String)

Any other backend failure, carried as its message.

Backend error types are neither Serialize nor uniform across backends, so the text is the whole payload — nothing matches on it.

Trait Implementations

impl Debug for BackendError

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

Formats the value using the given formatter.

impl Display for BackendError

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

Formats the value using the given formatter.

impl Error for BackendError

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<BackendError> for WriteError

Carries a backend failure across the IPC boundary as text.

WriteError is Serialize and BackendError is not, so the message is the payload; the typed error is never matched on downstream.

The impl lives here rather than beside WriteError because BackendError is the local half — the orphan rule allows exactly one of the two homes, and openlogi-core must never depend on a backend.

fn from(error: BackendError) -> Self

Converts to this type from the input type.

impl From<BackendError> for PairingError

Carries a backend failure across the IPC boundary as text, as From<BackendError> for WriteError does for writes.

fn from(error: BackendError) -> Self

Converts to this type from the input type.

impl From<BackendError> for InventoryError

fn from(source: BackendError) -> Self

Converts to this type from the input type.

impl From<BackendError> for GestureError

fn from(source: BackendError) -> Self

Converts to this type from the input type.

impl From<BackendError> for HostSwitchError

fn from(source: BackendError) -> Self

Converts to this type from the input type.