Enum RespondError 

pub enum RespondError {
    Failed(StreamError),
    Expired,
}

Why a bounded response never reached the peer.

The two are worth telling apart because they say different things about the peer and leave the stream in different states: a failed write is a stream that has already ended, while a lapsed deadline is a peer that is still there and simply will not read what it asked for.

Its Display and std::error::Error impls have no caller in this tree and are kept anyway: they are what makes a public error type usable at all – ? into a Box<dyn Error> or an anyhow::Error, and a source() chain that reaches the StreamError underneath – and a caller outside the crate has no other way to add them.

Variants

Failed(StreamError)

The write failed: the peer reset or stopped the stream, or the connection ended under it.

Expired

The deadline lapsed with the response unwritten.

The stream has already been reset with H3_REQUEST_CANCELLED, so there is nothing left to send or finish on it.

Trait Implementations

impl Debug for RespondError

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

Formats the value using the given formatter.

impl Display for RespondError

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

Formats the value using the given formatter.

impl Error for RespondError

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.