Enum FeedError 

pub enum FeedError {
    Connection(String),
    Parsing(String),
    Fatal(String),
    InvalidInput(String),
}

Failures of the feed layer: fetching, decoding, and publishing a provider’s snapshots.

Match on the variant: it says whether another attempt could answer differently, which is what a feed’s retrying and the conversion to SimulationError both turn on. The message beside it is written for a log line, and its wording carries no promise across versions.

Variants

Connection(String)

The provider could not be reached, or answered with something a later attempt may not answer with: a transport failure, a timeout, a server-side error.

Parsing(String)

The provider’s answer could not be turned into a snapshot.

Fatal(String)

No attempt can answer differently, so the feed gives up whatever its failure budget says. A failure someone can fix while the feed keeps retrying is not one of these.

InvalidInput(String)

The feed was configured with a value it cannot run with.

Implementations

impl FeedError

pub fn is_fatal(&self) -> bool

Whether another attempt is pointless. A feed stops on these, whatever failure budget it was configured with.

Trait Implementations

impl Clone for FeedError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FeedError

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

Formats the value using the given formatter.

impl Display for FeedError

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

Formats the value using the given formatter.

impl Error for FeedError

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<FeedError> for SimulationError

fn from(err: FeedError) -> Self

A state that cannot answer from the book it holds reports why in the vocabulary its caller acts on: a newer book may serve what this one cannot, so only a genuinely fatal feed error marks the component as one to stop simulating. The message moves across unchanged — the variant it lands in classifies it, and SimulationError says so in its own Display.