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use crate::alloc_prelude::*;
/// Errors that can occur when serializing a type.
#[derive(Clone, PartialEq, Eq)]
pub struct Error {
pub(crate) inner: ErrorInner,
}
impl Error {
pub(crate) fn new(inner: impl core::fmt::Display) -> Self {
Self {
inner: ErrorInner::Custom(inner.to_string()),
}
}
pub(crate) fn unsupported_type(t: Option<&'static str>) -> Self {
Self {
inner: ErrorInner::UnsupportedType(t),
}
}
pub(crate) fn out_of_range(t: Option<&'static str>) -> Self {
Self {
inner: ErrorInner::OutOfRange(t),
}
}
pub(crate) fn unsupported_none() -> Self {
Self {
inner: ErrorInner::UnsupportedNone,
}
}
pub(crate) fn key_not_string() -> Self {
Self {
inner: ErrorInner::KeyNotString,
}
}
#[cfg(feature = "display")]
pub(crate) fn date_invalid() -> Self {
Self {
inner: ErrorInner::DateInvalid,
}
}
}
impl From<core::fmt::Error> for Error {
fn from(_: core::fmt::Error) -> Self {
Self::new("an error occurred when writing a value")
}
}
impl serde_core::ser::Error for Error {
fn custom<T>(msg: T) -> Self
where
T: core::fmt::Display,
{
Self::new(msg)
}
}
impl core::fmt::Display for Error {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
self.inner.fmt(f)
}
}
impl core::fmt::Debug for Error {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
self.inner.fmt(f)
}
}
#[cfg(feature = "std")]
impl std::error::Error for Error {}
#[cfg(not(feature = "std"))]
impl serde_core::de::StdError for Error {}
/// Errors that can occur when deserializing a type.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub(crate) enum ErrorInner {
/// Type could not be serialized to TOML
UnsupportedType(Option<&'static str>),
/// Value was out of range for the given type
OutOfRange(Option<&'static str>),
/// `None` could not be serialized to TOML
UnsupportedNone,
/// Key was not convertible to `String` for serializing to TOML
KeyNotString,
/// A serialized date was invalid
DateInvalid,
/// Other serialization error
Custom(String),
}
impl core::fmt::Display for ErrorInner {
fn fmt(&self, formatter: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
match self {
Self::UnsupportedType(Some(t)) => write!(formatter, "unsupported {t} type"),
Self::UnsupportedType(None) => write!(formatter, "unsupported rust type"),
Self::OutOfRange(Some(t)) => write!(formatter, "out-of-range value for {t} type"),
Self::OutOfRange(None) => write!(formatter, "out-of-range value"),
Self::UnsupportedNone => "unsupported None value".fmt(formatter),
Self::KeyNotString => "map key was not a string".fmt(formatter),
Self::DateInvalid => "a serialized date was invalid".fmt(formatter),
Self::Custom(s) => s.fmt(formatter),
}
}
}