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use std::fmt::{self, Display};
/// An error that occurred while attempting to deal with the gateway.
///
/// Note that - from a user standpoint - there should be no situation in which
/// you manually handle these.
#[derive(Clone, Debug)]
pub enum Error {
/// The connection closed, potentially uncleanly.
Closed(Option<u16>, String),
/// Expected a Hello during a handshake
ExpectedHello,
/// Expected a Ready or an InvalidateSession
InvalidHandshake,
/// When a session Id was expected (for resuming), but was not present.
NoSessionId,
/// Failed to reconnect after a number of attempts.
ReconnectFailure,
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Closed(s, ref v) => {
f.write_str(&format!("Connection closed {:?}: {:?}", s, v))
},
Error::ExpectedHello => f.write_str("Expected Hello during handshake"),
Error::InvalidHandshake => f.write_str("Expected Ready or InvalidateSession"),
Error::NoSessionId => f.write_str("No Session Id present"),
Error::ReconnectFailure => f.write_str("Failed to Reconnect"),
}
}
}
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