deser/
error.rs

1//! Error interface.
2use std::borrow::Cow;
3use std::fmt;
4
5/// Describes the kind of error.
6#[derive(Debug, Eq, PartialEq, Copy, Clone)]
7pub enum ErrorKind {
8    UnsupportedType,
9    Unexpected,
10    MissingField,
11    OutOfRange,
12    WrongLength,
13    EndOfFile,
14}
15
16/// An error for deser.
17#[derive(Debug)]
18pub struct Error {
19    kind: ErrorKind,
20    msg: Cow<'static, str>,
21    source: Option<Box<dyn std::error::Error + Send + Sync>>,
22}
23
24impl Error {
25    /// Creates a new error.
26    pub fn new<M: Into<Cow<'static, str>>>(kind: ErrorKind, msg: M) -> Error {
27        Error {
28            kind,
29            msg: msg.into(),
30            source: None,
31        }
32    }
33
34    /// Attaches another error as source to this error.
35    pub fn with_source<E: std::error::Error + Send + Sync + 'static>(mut self, source: E) -> Self {
36        self.source = Some(Box::new(source));
37        self
38    }
39
40    /// Returns the kind of the error.
41    pub fn kind(&self) -> ErrorKind {
42        self.kind
43    }
44}
45
46impl fmt::Display for Error {
47    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
48        write!(f, "{:?}: {}", self.kind, self.msg)
49    }
50}
51
52impl std::error::Error for Error {
53    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
54        self.source.as_ref().map(|err| err.as_ref() as _)
55    }
56}
deser/error.rs

deser/
error.rs
