db_rs/
errors.rs

1use std::error::Error;
2use std::fmt::Display;
3use std::io;
4use std::sync::PoisonError;
5
6pub type DbResult<T> = Result<T, DbError>;
7
8#[derive(Debug)]
9pub enum DbError {
10    Unexpected(&'static str),
11    Io(io::Error),
12    Bincode(bincode::Error),
13    MutexPoisoned,
14}
15
16impl From<bincode::Error> for DbError {
17    fn from(err: bincode::Error) -> Self {
18        Self::Bincode(err)
19    }
20}
21
22impl From<io::Error> for DbError {
23    fn from(err: io::Error) -> Self {
24        Self::Io(err)
25    }
26}
27
28impl<G> From<PoisonError<G>> for DbError {
29    fn from(_: PoisonError<G>) -> Self {
30        Self::MutexPoisoned
31    }
32}
33
34impl Display for DbError {
35    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
36        match self {
37            DbError::Unexpected(u) => write!(f, "unexpected error: {u}"),
38            DbError::Io(i) => write!(f, "io error: {i}"),
39            DbError::Bincode(b) => write!(f, "bincode error: {b}"),
40            DbError::MutexPoisoned => write!(f, "mutex poisoned"),
41        }
42    }
43}
44
45impl Error for DbError {
46    fn source(&self) -> Option<&(dyn Error + 'static)> {
47        match self {
48            DbError::Io(e) => Some(e),
49            DbError::Bincode(e) => Some(e),
50            DbError::MutexPoisoned => None,
51            DbError::Unexpected(_) => None,
52        }
53    }
54}
db_rs/errors.rs

db_rs/
errors.rs
