Enum Error 

pub enum Error {
    Closed,
    Timeout,
    Transport(Arc<Error>),
    Remote(Error),
    UnexpectedResponse {
        expected: &'static str,
        received: &'static str,
    },
    WrongDirection(&'static str),
    TooLarge(usize),
    Malformed,
    InboundRequestLimitExceeded(usize),
    InboundByteLimitExceeded(usize),
}

Failure of a protocol operation. A remote application’s error is carried by Error::Remote; it does not by itself end the session.

Variants

Closed

The session or server was closed locally, including by dropping its owner.

Timeout

The operation’s absolute deadline expired. Remote work may still run.

Transport(Arc<Error>)

The underlying transport failed or the peer reset the session.

Remote(Error)

The peer returned an application error for this request.

UnexpectedResponse

The response’s Message variant does not match the type requested by Promise::wait(). This does not end the session.

Fields

expected: &'static str

Expected protobuf message type.

received: &'static str

Received protobuf message type.

WrongDirection(&'static str)

The submitted message cannot be sent from this session’s side. Reported through the request or reply promise; this error does not end the session.

TooLarge(usize)

The encoded message exceeds the transport’s sending limit.

Malformed

The peer sent an invalid envelope or payload. The session closes when this is detected. Nested payloads are checked only when recv() or wait() reads them.

InboundRequestLimitExceeded(usize)

A peer request would exceed the session’s request limit. Also returned if the limit is lowered below usage. Carries the configured request limit. This closes the session.

InboundByteLimitExceeded(usize)

Buffering an incoming envelope would exceed the session’s byte limit. Also returned if the limit is lowered below usage. Carries the configured byte limit. This closes the session.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<!> for Error

fn from(error: Infallible) -> Self

Allows Promise::wait() to return Message without extracting a variant.

impl From<Arc<Error>> for Error

fn from(source: Arc<Error>) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(error: Error) -> Self

Wraps a transport error in an Arc so pending promises can share it.

impl From<Error> for Error

fn from(error: Error) -> Self

Wraps the peer’s error code and message in Error::Remote.