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use self::Kind::*;
use std::error;
use std::fmt;
#[derive(Debug)]
pub struct Error(Kind);
#[derive(Debug)]
enum Kind {
Shutdown,
AtCapacity,
}
impl Error {
pub fn shutdown() -> Error {
Error(Shutdown)
}
pub fn is_shutdown(&self) -> bool {
match self.0 {
Kind::Shutdown => true,
_ => false,
}
}
pub fn at_capacity() -> Error {
Error(AtCapacity)
}
pub fn is_at_capacity(&self) -> bool {
match self.0 {
Kind::AtCapacity => true,
_ => false,
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
use self::Kind::*;
match self.0 {
Shutdown => "timer is shutdown",
AtCapacity => "timer is at capacity and cannot create a new entry",
}
}
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
use std::error::Error;
self.description().fmt(fmt)
}
}