bookkeeper_client/
error.rs

1use std::fmt::{self, Debug, Display, Formatter};
2use std::sync::Arc;
3
4#[derive(Clone, Debug)]
5enum Message {
6    None,
7    Static(&'static &'static str),
8    Dynamic(Box<str>),
9}
10
11/// Error wraps error kind with concrete message and cause.
12#[derive(Clone, Debug)]
13pub struct Error<T: Clone + Debug + Display> {
14    kind: T,
15    message: Message,
16    cause: Option<Arc<dyn std::error::Error + Send + Sync + 'static>>,
17}
18
19impl<K> Error<K>
20where
21    K: Clone + Debug + Display,
22{
23    pub(crate) fn new(kind: K) -> Error<K> {
24        Error { kind, message: Message::None, cause: None }
25    }
26
27    pub(crate) fn with_description(kind: K, description: &'static &'static str) -> Error<K> {
28        Error { kind, message: Message::Static(description), cause: None }
29    }
30
31    pub(crate) fn with_message<S: Into<Box<str>>>(kind: K, message: S) -> Error<K> {
32        Error { kind, message: Message::Dynamic(message.into()), cause: None }
33    }
34
35    pub(crate) fn cause_by<E: std::error::Error + Send + Sync + 'static>(self, e: E) -> Self {
36        let cause = Arc::new(e);
37        Error { cause: Some(cause), ..self }
38    }
39
40    /// Returns error kind.
41    pub fn kind(&self) -> K {
42        self.kind.clone()
43    }
44}
45
46impl<K> Display for Error<K>
47where
48    K: Clone + Debug + Display,
49{
50    fn fmt(&self, f: &mut Formatter<'_>) -> std::result::Result<(), fmt::Error> {
51        match &self.message {
52            Message::None => write!(f, "{}", self.kind),
53            Message::Static(message) => write!(f, "{}: {}", self.kind, message),
54            Message::Dynamic(message) => write!(f, "{}: {}", self.kind, &message),
55        }
56    }
57}
58
59impl<K> std::error::Error for Error<K>
60where
61    K: Clone + Debug + Display,
62{
63    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
64        match &self.cause {
65            None => None,
66            Some(arced) => Some(arced.as_ref()),
67        }
68    }
69}
bookkeeper_client/error.rs

bookkeeper_client/
error.rs
