1//! Watch error types.
 2
 3use std::fmt;
 4
 5#[derive(Debug, Eq, PartialEq)]
 6pub struct NoReceiverError;
 7
 8impl fmt::Display for NoReceiverError {
 9    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
10        write!(fmt, "all receivers were dropped")
11    }
12}
13
14impl std::error::Error for NoReceiverError {}
15
16#[derive(Debug, Eq, PartialEq)]
17pub struct NoSenderError;
18
19impl fmt::Display for NoSenderError {
20    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
21        write!(fmt, "sender was dropped")
22    }
23}
24
25impl std::error::Error for NoSenderError {}