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use std::error::Error;
use std::fmt;
#[derive(Debug)]
pub struct SendError<T>(pub T);
impl<T> fmt::Display for SendError<T> {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(fmt, "channel closed")
}
}
impl<T: fmt::Debug> std::error::Error for SendError<T> {}
#[derive(Debug, Eq, PartialEq)]
pub enum TrySendError<T> {
Full(T),
Closed(T),
}
impl<T: fmt::Debug> Error for TrySendError<T> {}
impl<T> fmt::Display for TrySendError<T> {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
fmt,
"{}",
match self {
TrySendError::Full(..) => "no available capacity",
TrySendError::Closed(..) => "channel closed",
}
)
}
}
impl<T> From<SendError<T>> for TrySendError<T> {
fn from(src: SendError<T>) -> TrySendError<T> {
TrySendError::Closed(src.0)
}
}
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
pub enum TryRecvError {
Empty,
Disconnected,
}
impl fmt::Display for TryRecvError {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
TryRecvError::Empty => "receiving on an empty channel".fmt(fmt),
TryRecvError::Disconnected => "receiving on a closed channel".fmt(fmt),
}
}
}
impl Error for TryRecvError {}
#[derive(Debug, Clone)]
#[doc(hidden)]
#[deprecated(note = "This type is unused because recv returns an Option.")]
pub struct RecvError(());
#[allow(deprecated)]
impl fmt::Display for RecvError {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(fmt, "channel closed")
}
}
#[allow(deprecated)]
impl Error for RecvError {}
cfg_time! {
#[derive(Debug, Eq, PartialEq)]
pub enum SendTimeoutError<T> {
Timeout(T),
Closed(T),
}
impl<T: fmt::Debug> Error for SendTimeoutError<T> {}
impl<T> fmt::Display for SendTimeoutError<T> {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
fmt,
"{}",
match self {
SendTimeoutError::Timeout(..) => "timed out waiting on send operation",
SendTimeoutError::Closed(..) => "channel closed",
}
)
}
}
}