Enum BackendConstructError 

#[non_exhaustive]
pub enum BackendConstructError {
    UnknownFamily {
        family: String,
    },
    Provider {
        family: &'static str,
        source: BoxError,
    },
}

Constructing a backend failed: a precondition or setup failure.

Produced only by LlmBackend::new and BackendFactory::create. Distinct from BackendError (operating a backend) and CapabilityError (static capability gating): construction never performs a chat call, so its failure model is isolated.

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.

UnknownFamily

No constructor is registered for the requested family (factory dispatch).

Fields

family: String

The family string that had no registered constructor.

Provider

The provider client could not be built.

Carries the backend family for attribution and the provider build failure as a boxed source, so callers can downcast to inspect TransportError::InvalidConfig / TransportError::BuildClient for the built-in backends, while custom backends may box any SDK-specific error.

Fields

family: &'static str

Backend family that failed to build.

source: BoxError

Provider-specific source error.

Implementations

impl BackendConstructError

pub fn unknown_family(family: impl Into<String>) -> Self

Creates an unknown-family error (factory dispatch miss).

pub fn provider<E>(family: &'static str, source: E) -> Self

where E: StdError + Send + Sync + 'static,

Wraps a provider build failure for the given backend family.

Trait Implementations

impl Debug for BackendConstructError

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

Formats the value using the given formatter.

impl Display for BackendConstructError

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

Formats the value using the given formatter.

impl Error for BackendConstructError

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.