toml/ser/
error.rs

1use crate::alloc_prelude::*;
2
3/// Errors that can occur when serializing a type.
4#[derive(Clone, PartialEq, Eq)]
5pub struct Error {
6    pub(crate) inner: ErrorInner,
7}
8
9impl Error {
10    pub(crate) fn new(inner: impl core::fmt::Display) -> Self {
11        Self {
12            inner: ErrorInner::Custom(inner.to_string()),
13        }
14    }
15
16    pub(crate) fn unsupported_type(t: Option<&'static str>) -> Self {
17        Self {
18            inner: ErrorInner::UnsupportedType(t),
19        }
20    }
21
22    pub(crate) fn unsupported_none() -> Self {
23        Self {
24            inner: ErrorInner::UnsupportedNone,
25        }
26    }
27
28    pub(crate) fn key_not_string() -> Self {
29        Self {
30            inner: ErrorInner::KeyNotString,
31        }
32    }
33
34    #[cfg(feature = "display")]
35    pub(crate) fn date_invalid() -> Self {
36        Self {
37            inner: ErrorInner::DateInvalid,
38        }
39    }
40}
41
42impl From<core::fmt::Error> for Error {
43    fn from(_: core::fmt::Error) -> Self {
44        Self::new("an error occurred when writing a value")
45    }
46}
47
48impl serde_core::ser::Error for Error {
49    fn custom<T>(msg: T) -> Self
50    where
51        T: core::fmt::Display,
52    {
53        Self::new(msg)
54    }
55}
56
57impl core::fmt::Display for Error {
58    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
59        self.inner.fmt(f)
60    }
61}
62
63impl core::fmt::Debug for Error {
64    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
65        self.inner.fmt(f)
66    }
67}
68
69#[cfg(feature = "std")]
70impl std::error::Error for Error {}
71#[cfg(not(feature = "std"))]
72impl serde_core::de::StdError for Error {}
73
74/// Errors that can occur when deserializing a type.
75#[derive(Debug, Clone, PartialEq, Eq, Hash)]
76#[non_exhaustive]
77pub(crate) enum ErrorInner {
78    /// Type could not be serialized to TOML
79    UnsupportedType(Option<&'static str>),
80    /// `None` could not be serialized to TOML
81    UnsupportedNone,
82    /// Key was not convertible to `String` for serializing to TOML
83    KeyNotString,
84    /// A serialized date was invalid
85    DateInvalid,
86    /// Other serialization error
87    Custom(String),
88}
89
90impl core::fmt::Display for ErrorInner {
91    fn fmt(&self, formatter: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
92        match self {
93            Self::UnsupportedType(Some(t)) => write!(formatter, "unsupported {t} type"),
94            Self::UnsupportedType(None) => write!(formatter, "unsupported rust type"),
95            Self::UnsupportedNone => "unsupported None value".fmt(formatter),
96            Self::KeyNotString => "map key was not a string".fmt(formatter),
97            Self::DateInvalid => "a serialized date was invalid".fmt(formatter),
98            Self::Custom(s) => s.fmt(formatter),
99        }
100    }
101}
toml/ser/error.rs

toml/ser/
error.rs
