Trait Error

pub trait Error: Debug + Display {
    // Provided methods
    fn source(&self) -> Option<&(dyn Error + 'static)> { ... }
    fn description(&self) -> &str { ... }
    fn cause(&self) -> Option<&dyn Error> { ... }
    fn provide<'a>(&'a self, request: &mut Request<'a>) { ... }
}

Error is a trait representing the basic expectations for error values, i.e., values of type E in Result<T, E>.

Errors must describe themselves through the Display and Debug traits. Error messages are typically concise lowercase sentences without trailing punctuation:

let err = "NaN".parse::<u32>().unwrap_err();
assert_eq!(err.to_string(), "invalid digit found in string");

Errors may provide cause information. Error::source() is generally used when errors cross “abstraction boundaries”. If one module must report an error that is caused by an error from a lower-level module, it can allow accessing that error via Error::source(). This makes it possible for the high-level module to provide its own errors while also revealing some of the implementation for debugging.

Provided Methods

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

Examples

use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct SuperError {
    source: SuperErrorSideKick,
}

impl fmt::Display for SuperError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "SuperError is here!")
    }
}

impl Error for SuperError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        Some(&self.source)
    }
}

#[derive(Debug)]
struct SuperErrorSideKick;

impl fmt::Display for SuperErrorSideKick {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "SuperErrorSideKick is here!")
    }
}

impl Error for SuperErrorSideKick {}

fn get_super_error() -> Result<(), SuperError> {
    Err(SuperError { source: SuperErrorSideKick })
}

fn main() {
    match get_super_error() {
        Err(e) => {
            println!("Error: {e}");
            println!("Caused by: {}", e.source().unwrap());
        }
        _ => println!("No error"),
    }
}

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() {
    // Print `e` itself, no need for description().
    eprintln!("Error: {e}");
}

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

Used in conjunction with Request::provide_value and Request::provide_ref to extract references to member variables from dyn Error trait objects.

Example

#![feature(error_generic_member_access)]
use core::fmt;
use core::error::{request_ref, Request};

#[derive(Debug)]
enum MyLittleTeaPot {
    Empty,
}

#[derive(Debug)]
struct MyBacktrace {
    // ...
}

impl MyBacktrace {
    fn new() -> MyBacktrace {
        // ...
    }
}

#[derive(Debug)]
struct Error {
    backtrace: MyBacktrace,
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Example Error")
    }
}

impl std::error::Error for Error {
    fn provide<'a>(&'a self, request: &mut Request<'a>) {
        request
            .provide_ref::<MyBacktrace>(&self.backtrace);
    }
}

fn main() {
    let backtrace = MyBacktrace::new();
    let error = Error { backtrace };
    let dyn_error = &error as &dyn std::error::Error;
    let backtrace_ref = request_ref::<MyBacktrace>(dyn_error).unwrap();

    assert!(core::ptr::eq(&error.backtrace, backtrace_ref));
    assert!(request_ref::<MyLittleTeaPot>(dyn_error).is_none());
}

Implementations

impl dyn Error

pub fn is<T>(&self) -> bool

where T: Error + 'static,

Returns true if the inner type is the same as T.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Error + 'static,

Returns some reference to the inner value if it is of type T, or None if it isn’t.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: Error + 'static,

Returns some mutable reference to the inner value if it is of type T, or None if it isn’t.

impl dyn Error + Send

pub fn is<T>(&self) -> bool

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

impl dyn Error + Send + Sync

pub fn is<T>(&self) -> bool

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

impl dyn Error

pub fn sources(&self) -> Source<'_>

🔬This is a nightly-only experimental API. (error_iter)

Returns an iterator starting with the current error and continuing with recursively calling Error::source.

If you want to omit the current error and only use its sources, use skip(1).

Examples

#![feature(error_iter)]
use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct A;

#[derive(Debug)]
struct B(Option<Box<dyn Error + 'static>>);

impl fmt::Display for A {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "A")
    }
}

impl fmt::Display for B {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "B")
    }
}

impl Error for A {}

impl Error for B {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        self.0.as_ref().map(|e| e.as_ref())
    }
}

let b = B(Some(Box::new(A)));

// let err : Box<Error> = b.into(); // or
let err = &b as &(dyn Error);

let mut iter = err.sources();

assert_eq!("B".to_string(), iter.next().unwrap().to_string());
assert_eq!("A".to_string(), iter.next().unwrap().to_string());
assert!(iter.next().is_none());
assert!(iter.next().is_none());

impl dyn Error

pub fn downcast<T>(self: Box<dyn Error>) -> Result<Box<T>, Box<dyn Error>>

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

impl dyn Error + Send

pub fn downcast<T>( self: Box<dyn Error + Send>, ) -> Result<Box<T>, Box<dyn Error + Send>>

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

impl dyn Error + Send + Sync

pub fn downcast<T>( self: Box<dyn Error + Send + Sync>, ) -> Result<Box<T>, Box<dyn Error + Send + Sync>>

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

Trait Implementations

impl AsRef<dyn Error> for Error

fn as_ref(&self) -> &(dyn Error + 'static)

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<dyn Error + Send + Sync> for Error

fn as_ref(&self) -> &(dyn Error + Send + Sync + 'static)

Converts this type into a shared reference of the (usually inferred) input type.

impl<'a> From<&str> for Box<dyn Error + 'a>

fn from(err: &str) -> Box<dyn Error + 'a>

Converts a str into a box of dyn Error.

Examples

use std::error::Error;
use std::mem;

let a_str_error = "a str error";
let a_boxed_error = Box::<dyn Error>::from(a_str_error);
assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))

impl<'a> From<&str> for Box<dyn Error + Send + Sync + 'a>

fn from(err: &str) -> Box<dyn Error + Send + Sync + 'a>

Converts a str into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;
use std::mem;

let a_str_error = "a str error";
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_str_error);
assert!(
    mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))

impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + 'a>

fn from(err: Cow<'b, str>) -> Box<dyn Error + 'a>

Converts a Cow into a box of dyn Error.

Examples

use std::error::Error;
use std::mem;
use std::borrow::Cow;

let a_cow_str_error = Cow::from("a str error");
let a_boxed_error = Box::<dyn Error>::from(a_cow_str_error);
assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))

impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Send + Sync + 'a>

fn from(err: Cow<'b, str>) -> Box<dyn Error + Send + Sync + 'a>

Converts a Cow into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;
use std::mem;
use std::borrow::Cow;

let a_cow_str_error = Cow::from("a str error");
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_cow_str_error);
assert!(
    mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))

impl<'a, E> From<E> for Box<dyn Error + 'a>

where E: Error + 'a,

fn from(err: E) -> Box<dyn Error + 'a>

Converts a type of Error into a box of dyn Error.

Examples

use std::error::Error;
use std::fmt;
use std::mem;

#[derive(Debug)]
struct AnError;

impl fmt::Display for AnError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "An error")
    }
}

impl Error for AnError {}

let an_error = AnError;
assert!(0 == mem::size_of_val(&an_error));
let a_boxed_error = Box::<dyn Error>::from(an_error);
assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))

impl<'a, E> From<E> for Box<dyn Error + Send + Sync + 'a>

where E: Error + Send + Sync + 'a,

fn from(err: E) -> Box<dyn Error + Send + Sync + 'a>

Converts a type of Error + Send + Sync into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;
use std::fmt;
use std::mem;

#[derive(Debug)]
struct AnError;

impl fmt::Display for AnError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "An error")
    }
}

impl Error for AnError {}

unsafe impl Send for AnError {}

unsafe impl Sync for AnError {}

let an_error = AnError;
assert!(0 == mem::size_of_val(&an_error));
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(an_error);
assert!(
    mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))

impl From<Error> for Box<dyn Error>

fn from(error: Error) -> Box<dyn Error>

Converts to this type from the input type.

impl From<Error> for Box<dyn Error + Send>

fn from(error: Error) -> Box<dyn Error + Send>

Converts to this type from the input type.

impl From<Error> for Box<dyn Error + Send + Sync>

fn from(error: Error) -> Box<dyn Error + Send + Sync>

Converts to this type from the input type.

impl<'a> From<String> for Box<dyn Error + 'a>

fn from(str_err: String) -> Box<dyn Error + 'a>

Converts a String into a box of dyn Error.

Examples

use std::error::Error;
use std::mem;

let a_string_error = "a string error".to_string();
let a_boxed_error = Box::<dyn Error>::from(a_string_error);
assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))

impl<'a> From<String> for Box<dyn Error + Send + Sync + 'a>

fn from(err: String) -> Box<dyn Error + Send + Sync + 'a>

Converts a String into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;
use std::mem;

let a_string_error = "a string error".to_string();
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_string_error);
assert!(
    mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))

impl Value for dyn Error

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Value for dyn Error + Send

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Value for dyn Error + Send + Sync

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Value for dyn Error + Sync

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

Implementors

impl !Error for &str

impl Error for codespan_reporting::files::Error

impl Error for AdditionError

impl Error for CreationError

impl Error for RecordError

impl Error for SubtractionError

impl Error for httparse::Error

impl Error for humantime::date::Error

impl Error for humantime::duration::Error

impl Error for GetTimezoneError

impl Error for ignore::Error

impl Error for libloading::error::Error

impl Error for InsertError

impl Error for matchit::error::MatchError

impl Error for nix::errno::consts::Errno

impl Error for rand::distributions::bernoulli::BernoulliError

impl Error for WeightedError

impl Error for StartError

impl Error for regex_syntax::error::Error

impl Error for rustls_pki_types::pem::Error

impl Error for rusty_fork::error::Error

impl Error for serde_urlencoded::ser::Error

impl Error for QuoteError

impl Error for StrSimError

impl Error for AnyDelimiterCodecError

impl Error for LinesCodecError

impl Error for toml_edit::ser::Error

impl Error for ucd_trie::owned::Error

impl Error for ErrorKind

impl Error for BytesRejection

impl Error for ExtensionRejection

impl Error for FailedToBufferBody

impl Error for FormRejection

impl Error for JsonRejection

impl Error for MatchedPathRejection

impl Error for PathRejection

impl Error for QueryRejection

impl Error for RawFormRejection

impl Error for RawPathParamsRejection

impl Error for StringRejection

impl Error for ParseAlphabetError

impl Error for DecodeError

impl Error for DecodeSliceError

impl Error for EncodeSliceError

impl Error for BindgenError

impl Error for RoundingError

impl Error for MatchesError

impl Error for rustmax::crossbeam::channel::RecvTimeoutError

impl Error for rustmax::crossbeam::channel::TryRecvError

impl Error for rustmax::ctrlc::Error

impl Error for BinaryError

impl Error for FromHexError

impl Error for rustmax::json5::Error

impl Error for rustmax::proptest::string::Error

impl Error for rustmax::rand::distr::BernoulliError

impl Error for rustmax::rand::distr::uniform::Error

impl Error for rustmax::rand::seq::WeightError

impl Error for rustmax::regex::Error

impl Error for ReadlineError

impl Error for Infallible

impl Error for VarError

impl Error for rustmax::std::sync::mpsc::RecvTimeoutError

impl Error for rustmax::std::sync::mpsc::TryRecvError

impl Error for rustmax::tokio::sync::broadcast::error::RecvError

impl Error for rustmax::tokio::sync::broadcast::error::TryRecvError

impl Error for TryAcquireError

impl Error for rustmax::tokio::sync::mpsc::error::TryRecvError

impl Error for rustmax::tokio::sync::oneshot::error::TryRecvError

impl Error for rustmax::url::ParseError

impl Error for !

impl Error for aho_corasick::util::error::BuildError

impl Error for aho_corasick::util::error::MatchError

impl Error for aho_corasick::util::primitives::PatternIDError

impl Error for aho_corasick::util::primitives::StateIDError

impl Error for bstr::ext_vec::FromUtf8Error

impl Error for bstr::utf8::Utf8Error

impl Error for chrono_tz::timezones::ParseError

impl Error for env_filter::parser::ParseError

impl Error for getrandom::error::Error

impl Error for getrandom::error::Error

impl Error for glob::GlobError

impl Error for PatternError

impl Error for globset::Error

impl Error for globwalk::GlobError

impl Error for h2::error::Error

impl Error for UsizeTypeTooSmall

impl Error for http_body_util::limited::LengthLimitError

impl Error for httpdate::Error

impl Error for hyper_util::client::legacy::client::Error

impl Error for InvalidNameError

impl Error for Errors

impl Error for indexmap::TryReserveError

impl Error for PrefixLenError

impl Error for ipnet::parser::AddrParseError

impl Error for native_tls::Error

impl Error for object::read::Error

impl Error for openssl::error::Error

impl Error for ErrorStack

impl Error for openssl::ssl::error::Error

impl Error for X509VerifyResult

impl Error for ReadError

impl Error for rand_core::error::Error

impl Error for regex_automata::dfa::onepass::BuildError

impl Error for regex_automata::hybrid::error::BuildError

impl Error for CacheError

impl Error for regex_automata::meta::error::BuildError

impl Error for regex_automata::nfa::thompson::error::BuildError

impl Error for GroupInfoError

impl Error for UnicodeWordBoundaryError

impl Error for regex_automata::util::primitives::PatternIDError

impl Error for SmallIndexError

impl Error for regex_automata::util::primitives::StateIDError

impl Error for regex_automata::util::search::MatchError

impl Error for PatternSetInsertError

impl Error for DeserializeError

impl Error for SerializeError

impl Error for regex_syntax::ast::Error

impl Error for regex_syntax::hir::Error

impl Error for CaseFoldError

impl Error for UnicodeWordError

impl Error for rustix::backend::io::errno::Errno

impl Error for rustls_pki_types::server_name::AddrParseError

impl Error for InvalidDnsNameError

impl Error for LengthDelimitedCodecError

impl Error for toml_edit::de::Error

impl Error for TomlError

impl Error for SetGlobalDefaultError

impl Error for tracing_core::metadata::ParseLevelError

impl Error for ParseLevelFilterError

impl Error for FailedToDeserializeForm

impl Error for FailedToDeserializeFormBody

impl Error for FailedToDeserializePathParams

impl Error for FailedToDeserializeQueryString

impl Error for InvalidFormContentType

impl Error for InvalidUtf8

impl Error for InvalidUtf8InPathParam

impl Error for JsonDataError

impl Error for JsonSyntaxError

impl Error for rustmax::axum::extract::rejection::LengthLimitError

impl Error for MatchedPathMissing

impl Error for MissingExtension

impl Error for MissingJsonContentType

impl Error for MissingPathParams

impl Error for NestedPathRejection

impl Error for UnknownBodyError

impl Error for rustmax::axum::Error

impl Error for rustmax::bitflags::parser::ParseError

impl Error for HexError

impl Error for rustmax::cc::Error

impl Error for OutOfRange

impl Error for OutOfRangeError

impl Error for rustmax::chrono::ParseError

impl Error for ParseMonthError

impl Error for ParseWeekdayError

impl Error for rustmax::crossbeam::channel::RecvError

impl Error for SelectTimeoutError

impl Error for TrySelectError

impl Error for rustmax::derive_more::FromStrError

impl Error for UnitError

impl Error for WrongVariantError

impl Error for rustmax::futures::channel::mpsc::SendError

impl Error for rustmax::futures::channel::mpsc::TryRecvError

impl Error for Canceled

impl Error for EnterError

impl Error for Aborted

impl Error for SpawnError

impl Error for InvalidMethod

impl Error for InvalidStatusCode

impl Error for rustmax::hyper::http::Error

impl Error for InvalidUri

impl Error for InvalidUriParts

impl Error for rustmax::hyper::Error

impl Error for rustmax::jiff::Error

impl Error for rustmax::log::ParseLevelError

impl Error for SetLoggerError

impl Error for rustmax::mime::FromStrError

impl Error for ParseBigIntError

impl Error for rustmax::proc_macro2::LexError

impl Error for ExpandError

impl Error for rustmax::proc_macro::LexError

impl Error for Empty

impl Error for OsError

impl Error for ThreadPoolBuildError

impl Error for InvalidHeaderName

impl Error for InvalidHeaderValue

impl Error for MaxSizeReached

impl Error for ToStrError

impl Error for rustmax::reqwest::Error

impl Error for rustmax::semver::Error

impl Error for rustmax::serde::de::value::Error

impl Error for rustmax::serde_json::Error

impl Error for InvalidLength

impl Error for InvalidBufferSize

impl Error for InvalidOutputSize

impl Error for AllocError

impl Error for LayoutError

impl Error for TryFromSliceError

impl Error for BorrowError

impl Error for BorrowMutError

impl Error for CharTryFromError

impl Error for DecodeUtf16Error

impl Error for ParseCharError

impl Error for TryFromCharError

impl Error for UnorderedKeyError

impl Error for rustmax::std::collections::TryReserveError

impl Error for JoinPathsError

impl Error for FromBytesUntilNulError

impl Error for FromBytesWithNulError

impl Error for FromVecWithNulError

impl Error for IntoStringError

impl Error for NulError

impl Error for rustmax::std::fmt::Error

impl Error for rustmax::std::io::Error

impl Error for WriterPanicked

impl Error for rustmax::std::net::AddrParseError

impl Error for ParseFloatError

impl Error for ParseIntError

impl Error for TryFromIntError

impl Error for StripPrefixError

impl Error for ExitStatusError

impl Error for ParseBoolError

impl Error for rustmax::std::str::Utf8Error

impl Error for rustmax::std::string::FromUtf8Error

impl Error for FromUtf16Error

impl Error for rustmax::std::sync::mpsc::RecvError

impl Error for AccessError

impl Error for SystemTimeError

impl Error for TryFromFloatSecsError

impl Error for rustmax::syn::Error

impl Error for PathPersistError

impl Error for rustmax::tera::Error

impl Error for ColorChoiceParseError

impl Error for ParseColorError

impl Error for rustmax::tokio::net::tcp::ReuniteError

impl Error for rustmax::tokio::net::unix::ReuniteError

impl Error for TryCurrentError

impl Error for rustmax::tokio::sync::oneshot::error::RecvError

impl Error for AcquireError

impl Error for rustmax::tokio::sync::TryLockError

impl Error for rustmax::tokio::sync::watch::error::RecvError

impl Error for JoinError

impl Error for rustmax::tokio::time::error::Elapsed

impl Error for rustmax::tokio::time::error::Error

impl Error for rustmax::toml::de::Error

impl Error for rustmax::toml::ser::Error

impl Error for DatetimeParseError

impl Error for Discover

impl Error for Closed

impl Error for ServiceError

impl Error for Overloaded

impl Error for InvalidBackoff

impl Error for rustmax::tower::timeout::error::Elapsed

impl Error for None

impl Error for rustmax::walkdir::Error

impl Error for rustmax::xshell::Error

impl Error for Exception

impl<'a, K, V> Error for rustmax::std::collections::btree_map::OccupiedError<'a, K, V>

where K: Debug + Ord, V: Debug,

impl<'a, K, V> Error for rustmax::std::collections::hash_map::OccupiedError<'a, K, V>

where K: Debug, V: Debug,

impl<'a, T> Error for &'a T

where T: Error + ?Sized,

impl<A, S, V> Error for ConvertError<A, S, V>

where A: Display + Debug, S: Display + Debug, V: Display + Debug,

impl<E> Error for nom::internal::Err<E>

where E: Debug,

impl<E> Error for rustmax::nom::Err<E>

where E: Debug,

impl<E> Error for serde_path_to_error::Error<E>

where E: Error,

impl<E> Error for Box<E>

where E: Error,

impl<Enum> Error for TryFromPrimitiveError<Enum>

where Enum: TryFromPrimitive,

impl<F> Error for rustmax::clap::error::Error<F>

where F: ErrorFormatter,

impl<F> Error for PersistError<F>

impl<I> Error for nom::error::Error<I>

where I: Debug + Display,

impl<I> Error for VerboseError<I>

where I: Debug + Display,

impl<I> Error for InputError<I>

where I: Clone + Debug + Display + Sync + Send + 'static,

impl<I> Error for ExactlyOneError<I>

where I: Iterator + Debug, <I as Iterator>::Item: Debug,

impl<I> Error for rustmax::nom::error::Error<I>

where I: Debug + Display,

impl<I, C> Error for TreeError<I, C>

where I: Stream + Clone + Debug + Display + Sync + Send + 'static, C: Display + Debug,

impl<K> Error for Failed<K>

where K: Debug,

impl<K, V> Error for TryIntoHeaderError<K, V>

where K: Error + 'static, V: Error + 'static,

impl<L, R> Error for Either<L, R>

where L: Error, R: Error,

Either implements Error if both L and R implement it.

Requires crate feature "use_std"

impl<R> Error for ErrorVariant<R>

where ErrorVariant<R>: Debug + Display,

impl<R> Error for pest::error::Error<R>

where Error<R>: Debug + Display,

impl<S> Error for native_tls::HandshakeError<S>

where S: Any + Debug,

impl<S> Error for openssl::ssl::error::HandshakeError<S>

where S: Debug,

impl<Src, Dst> Error for AlignmentError<Src, Dst>

where Src: Deref, Dst: KnownLayout + ?Sized,

impl<Src, Dst> Error for SizeError<Src, Dst>

where Src: Deref, Dst: KnownLayout + ?Sized,

impl<Src, Dst> Error for ValidityError<Src, Dst>

where Src: Deref, Dst: KnownLayout + TryFromBytes + ?Sized,

impl<T> Error for rustmax::crossbeam::channel::SendTimeoutError<T>

where T: Send,

impl<T> Error for rustmax::crossbeam::channel::TrySendError<T>

where T: Send,

impl<T> Error for TestError<T>

where T: Debug,

impl<T> Error for rustmax::std::sync::TryLockError<T>

impl<T> Error for rustmax::std::sync::mpmc::SendTimeoutError<T>

impl<T> Error for rustmax::std::sync::mpsc::TrySendError<T>

impl<T> Error for SetError<T>

where T: Debug,

impl<T> Error for rustmax::tokio::sync::mpsc::error::SendTimeoutError<T>

impl<T> Error for rustmax::tokio::sync::mpsc::error::TrySendError<T>

impl<T> Error for PollSendError<T>

where T: Debug,

impl<T> Error for rustmax::crossbeam::channel::SendError<T>

where T: Send,

impl<T> Error for TryFromReprError<T>

where T: Debug,

impl<T> Error for TryIntoError<T>

where T: Debug,

impl<T> Error for TryUnwrapError<T>

where T: Debug,

impl<T> Error for rustmax::futures::channel::mpsc::TrySendError<T>

where T: Any,

impl<T> Error for rustmax::futures::io::ReuniteError<T>

where T: Any,

impl<T> Error for TryFromBigIntError<T>

where T: Debug,

impl<T> Error for ThinBox<T>

where T: Error + ?Sized,

impl<T> Error for rustmax::std::sync::mpsc::SendError<T>

impl<T> Error for Arc<T>

where T: Error + ?Sized,

impl<T> Error for PoisonError<T>

impl<T> Error for AsyncFdTryNewError<T>

impl<T> Error for rustmax::tokio::sync::broadcast::error::SendError<T>

where T: Debug,

impl<T> Error for rustmax::tokio::sync::mpsc::error::SendError<T>

impl<T> Error for rustmax::tokio::sync::watch::error::SendError<T>

impl<T, E> Error for TryChunksError<T, E>

where E: Debug + Display,

impl<T, E> Error for TryReadyChunksError<T, E>

where E: Debug + Display,

impl<T, Item> Error for rustmax::futures::prelude::stream::ReuniteError<T, Item>

where T: Any,

impl<W> Error for IntoInnerError<W>

where W: Send + Debug,

impl<const N: usize> Error for GetManyMutError<N>