Enum RerankError 

#[non_exhaustive]
pub enum RerankError {
    Network(String),
    Auth(String),
    RateLimited(String),
    BadRequest {
        status: u16,
        body: String,
    },
    Server {
        status: u16,
        body: String,
    },
    Decode(String),
    Config(String),
    Inference(String),
    ScoreCountMismatch {
        expected: usize,
        got: usize,
    },
}

Error surface for cross-encoder reranker adapters.

Marked #[non_exhaustive] so provider crates can grow their own failure modes without a breaking change here.

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.

Network(String)

TLS / TCP / DNS / timeout failure reaching the provider.

Auth(String)

Provider rejected credentials.

RateLimited(String)

Provider rate-limited the request.

BadRequest

4xx from the provider.

Fields

status: u16

HTTP status code.

body: String

Response body or best-effort error string.

Server

5xx from the provider.

Fields

status: u16

HTTP status code.

body: String

Response body or best-effort error string.

Decode(String)

Response decoder failed (malformed JSON, missing score field, …).

Config(String)

Adapter config invalid (bad URL, missing env var, etc.).

Inference(String)

Model / tokenizer / ONNX session runtime failure, distinct from config-time validation. Mirrors crate::sparse::SparseError::Inference so sibling provider traits surface runtime failures with a consistent shape.

ScoreCountMismatch

Provider returned a different number of scores than candidates. Implementations MUST reject this up front; the retriever would otherwise zip mismatched pairs.

Fields

expected: usize

Number of candidates sent.

got: usize

Number of scores returned.

Trait Implementations

impl Debug for RerankError

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

Formats the value using the given formatter.

impl Display for RerankError

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

Formats the value using the given formatter.

impl Error for RerankError

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.