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use core::fmt;
pub(crate) type Result<T> = core::result::Result<T, Kind>;
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub struct Error<'a> {
kind: Kind,
input: &'a str,
}
impl<'a> Error<'a> {
pub const fn kind(&self) -> Kind {
self.kind
}
pub const fn input(&self) -> &str {
self.input
}
}
impl<'a> fmt::Display for Error<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.kind {
Kind::NameTooLong => write!(f, "'{}' is too long", self.input),
Kind::NetDisabled => write!(f, "'{}'; can't parse email addresses containing IP addresses when `net` feature is disabled", self.input),
Kind::EmptyLabel => write!(f, "'{}' contains an empty label", self.input),
Kind::EmailLocalTooLong => {
write!(f, "the user local part in '{}' is too long", self.input)
}
Kind::EmailTooLong => write!(f, "'{}' is too long for an email address", self.input),
Kind::EmptyName => write!(f, "name is empty"),
Kind::IllegalCharacter => write!(f, "'{}' contains an illegal character", self.input),
Kind::InvalidDomain => write!(f, "'{}' is not a valid domain name", self.input),
Kind::InvalidIpAddr => write!(f, "'{}' contains an invalid IP address", self.input),
Kind::LabelEndNotAlnum => {
write!(
f,
"'{}' has a label that does not end with an alphanumeric character",
self.input
)
}
Kind::LabelStartNotAlnum => {
write!(
f,
"'{}' has a label that does not start with an alphanumeric character",
self.input
)
}
Kind::LabelTooLong => write!(f, "'{}' has a label that is too long", self.input),
Kind::NoAtSign => write!(f, "'{}' does not have an @ sign", self.input),
Kind::NoHostPart => write!(f, "'{}' does not have a host part", self.input),
Kind::NoUserPart => write!(f, "'{}' does not have a user local part", self.input),
Kind::NumericTld => write!(f, "'{}' has a numeric TLD", self.input),
Kind::QuoteUnclosed => write!(f, "'{}' has an unclosed quotation mark", self.input),
Kind::TooManyLabels => write!(f, "'{}' contains too many labels", self.input),
}
}
}
#[cfg(feature = "std")]
impl<'a> std::error::Error for Error<'a> {}
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
#[non_exhaustive]
pub enum Kind {
NameTooLong,
NetDisabled,
EmptyLabel,
EmailLocalTooLong,
EmailTooLong,
EmptyName,
IllegalCharacter,
InvalidDomain,
InvalidIpAddr,
LabelEndNotAlnum,
LabelStartNotAlnum,
LabelTooLong,
NoAtSign,
NoHostPart,
NoUserPart,
NumericTld,
QuoteUnclosed,
TooManyLabels,
}
impl Kind {
pub(crate) const fn error_with(self, input: &str) -> Error<'_> {
Error { kind: self, input }
}
}