summaryrefslogtreecommitdiff
path: root/serde_dhall/src/error.rs
blob: 3309fe49c4908a269294c95a0e76a91549a981ad (plain)
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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
use dhall::error::Error as DhallError;

/// Alias for a `Result` with the error type `serde_dhall::Error`.
pub type Result<T> = std::result::Result<T, Error>;

/// Errors that can occur when deserializing Dhall data.
#[derive(Debug)]
pub struct Error(pub(crate) ErrorKind);

#[derive(Debug)]
pub(crate) enum ErrorKind {
    Dhall(DhallError),
    Deserialize(String),
    Serialize(String),
}

impl From<ErrorKind> for Error {
    fn from(kind: ErrorKind) -> Error {
        Error(kind)
    }
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match &self.0 {
            ErrorKind::Dhall(err) => write!(f, "{}", err),
            ErrorKind::Deserialize(err) => write!(f, "{}", err),
            ErrorKind::Serialize(err) => write!(f, "{}", err),
        }
    }
}

impl std::error::Error for Error {}

impl serde::de::Error for Error {
    fn custom<T>(msg: T) -> Self
    where
        T: std::fmt::Display,
    {
        ErrorKind::Deserialize(msg.to_string()).into()
    }
}

impl serde::ser::Error for Error {
    fn custom<T>(msg: T) -> Self
    where
        T: std::fmt::Display,
    {
        ErrorKind::Serialize(msg.to_string()).into()
    }
}