1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
use std::error::Error;
#[derive(Debug, Clone)]
pub struct UserError<'a> {
message: &'a str,
}
impl<'a> UserError<'a> {
pub fn new(message: &'a str) -> UserError<'a> {
UserError { message }
}
pub fn boxed(message: &'a str) -> Box<UserError<'a>> {
Box::new(UserError::new(message))
}
}
impl<'a> std::fmt::Display for UserError<'a> {
fn fmt(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(formatter, "{}", self.message)
}
}
impl<'a> Error for UserError<'a> {
fn description(&self) -> &str {
&self.message
}
fn cause(&self) -> Option<&Error> {
None
}
}