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 + Sync + 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

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 + Sync + Send

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

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

Trait Implementations

impl AsErrorSource for dyn Error

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

For maximum effectiveness, this needs to be called as a method to benefit from Rust’s automatic dereferencing of method receivers.

impl AsErrorSource for dyn Error + Send

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

For maximum effectiveness, this needs to be called as a method to benefit from Rust’s automatic dereferencing of method receivers.

impl AsErrorSource for dyn Error + Sync + Send

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

For maximum effectiveness, this needs to be called as a method to benefit from Rust’s automatic dereferencing of method receivers.

impl AsErrorSource for dyn Error + Sync

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

For maximum effectiveness, this needs to be called as a method to benefit from Rust’s automatic dereferencing of method receivers.

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 + Sync + Send + 'a>

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

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

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

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

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

Converts to this type from the input type.

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

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

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 + Sync + Send + 'a>

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

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 ParseExperimentalTargetError

impl Error for ParseFuncTargetError

impl Error for surrealdb_core::err::Error

impl Error for surrealdb_core::iam::Error

impl Error for RpcError

impl Error for CharError

impl Error for Infallible

impl Error for FromBytesWithNulError

impl Error for GetManyMutError

impl Error for VarError

impl Error for RecvTimeoutError

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

impl Error for arbitrary::error::Error

impl Error for async_channel::TryRecvError

impl Error for base64::alphabet::ParseAlphabetError

impl Error for base64::alphabet::ParseAlphabetError

impl Error for base64::decode::DecodeError

impl Error for base64::decode::DecodeError

impl Error for base64::decode::DecodeSliceError

impl Error for base64::decode::DecodeSliceError

impl Error for base64::encode::EncodeSliceError

impl Error for base64::encode::EncodeSliceError

impl Error for base64ct::errors::Error

impl Error for BcryptError

impl Error for ErrorKind

impl Error for SubstitutionError

impl Error for LinkingError

impl Error for ReificationError

impl Error for UnexpectedSlotError

impl Error for cedar_policy_core::ast::policy_set::PolicySetError

impl Error for RestrictedExpressionError

impl Error for NotValue

impl Error for AuthorizationError

impl Error for EntitiesError

impl Error for JsonDeserializationError

impl Error for JsonSerializationError

impl Error for EstToAstError

impl Error for InstantiationError

impl Error for cedar_policy_core::evaluator::err::EvaluationError

impl Error for ExtensionsError

impl Error for cedar_policy_core::parser::err::ParseError

impl Error for cedar_policy_validator::err::SchemaError

impl Error for ValidationWarningKind

impl Error for TypeErrorKind

impl Error for ValidationErrorKind

impl Error for ContextJsonError

impl Error for cedar_policy::api::EvaluationError

impl Error for cedar_policy::api::PolicySetError

impl Error for PolicyToJsonError

impl Error for cedar_policy::api::SchemaError

impl Error for RoundingError

impl Error for ciborium::value::error::Error

impl Error for PopError

impl Error for earcutr::Error

impl Error for fst::error::Error

impl Error for fst::raw::error::Error

impl Error for geo_types::error::Error

impl Error for TriangulationError

impl Error for httparse::Error

impl Error for GetTimezoneError

impl Error for LinalgError

impl Error for MietteError

impl Error for MinMaxError

impl Error for MultiInputError

impl Error for QuantileError

impl Error for BinsBuildError

impl Error for object_store::Error

where Error: Debug + Display,

impl Error for object_store::path::Error

where Error: Debug + Display,

impl Error for password_hash::errors::Error

impl Error for InvalidValue

impl Error for PemError

impl Error for BernoulliError

impl Error for WeightedError

impl Error for StartError

impl Error for regex_syntax::error::Error

impl Error for regex::error::Error

impl Error for revision::error::Error

impl Error for rmp_serde::decode::Error

impl Error for rmp_serde::encode::Error

impl Error for BytesReadError

impl Error for NumValueReadError

impl Error for ValueReadError

impl Error for rmpv::decode::Error

impl Error for rquickjs_core::result::Error

impl Error for rust_decimal::error::Error

impl Error for serde_urlencoded::ser::Error

impl Error for ASN1DecodeErr

impl Error for ASN1EncodeErr

impl Error for snap::error::Error

impl Error for InsertionError

impl Error for storekey::decode::Error

impl Error for storekey::encode::Error

impl Error for StrSimError

impl Error for surrealkv::error::Error

impl Error for surrealkv::log::Error

impl Error for time::error::Error

impl Error for Format

impl Error for InvalidFormatDescription

impl Error for Parse

impl Error for ParseFromDescription

impl Error for TryFromParsed

impl Error for AnyDelimiterCodecError

impl Error for LinesCodecError

impl Error for TryAcquireError

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

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

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

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

impl Error for ulid::base32::DecodeError

impl Error for EncodeError

impl Error for MonotonicError

impl Error for url::parser::ParseError

impl Error for vart::TrieError

impl Error for vart::TrieError

impl Error for !

impl Error for ParseMethodTargetError

impl Error for ParseNetTargetError

impl Error for ParseRouteTargetError

impl Error for surrealdb_core::vs::fmt::Error

impl Error for VersionStampError

impl Error for Box<dyn Diagnostic + Send>

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

impl Error for Box<dyn Diagnostic>

impl Error for UnorderedKeyError

impl Error for alloc::collections::TryReserveError

impl Error for FromVecWithNulError

impl Error for IntoStringError

impl Error for NulError

impl Error for FromUtf8Error

impl Error for FromUtf16Error

impl Error for LayoutError

impl Error for AllocError

impl Error for TryFromSliceError

impl Error for BorrowError

impl Error for BorrowMutError

impl Error for CharTryFromError

impl Error for ParseCharError

impl Error for DecodeUtf16Error

impl Error for TryFromCharError

impl Error for FromBytesUntilNulError

impl Error for core::net::parser::AddrParseError

impl Error for ParseFloatError

impl Error for core::num::error::ParseIntError

impl Error for core::num::error::TryFromIntError

impl Error for ParseBoolError

impl Error for Utf8Error

impl Error for TryFromFloatSecsError

impl Error for JoinPathsError

impl Error for WriterPanicked

impl Error for std::io::error::Error

impl Error for StripPrefixError

impl Error for ExitStatusError

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

impl Error for AccessError

impl Error for SystemTimeError

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 MaxRecursionReached

impl Error for async_channel::RecvError

impl Error for InvalidEncodingError

impl Error for InvalidLengthError

impl Error for bitflags::parser::ParseError

impl Error for HexError

impl Error for ParseErrors

impl Error for ToCSTError

impl Error for TypeError

impl Error for chrono::format::ParseError

impl Error for ParseMonthError

impl Error for OutOfRange

impl Error for OutOfRangeError

impl Error for ParseWeekdayError

impl Error for InvalidLength

impl Error for deranged::ParseIntError

impl Error for deranged::TryFromIntError

impl Error for MacError

impl Error for InvalidBufferSize

impl Error for InvalidOutputSize

impl Error for futures_channel::mpsc::SendError

impl Error for futures_channel::mpsc::TryRecvError

impl Error for Canceled

impl Error for EnterError

impl Error for SpawnError

impl Error for Aborted

impl Error for InvalidRectCoordinatesError

impl Error for FailedToConvergeError

impl Error for getrandom::error::Error

impl Error for LengthLimitError

impl Error for http::error::Error

impl Error for MaxSizeReached

impl Error for InvalidHeaderName

impl Error for InvalidHeaderValue

impl Error for ToStrError

impl Error for InvalidMethod

impl Error for InvalidStatusCode

impl Error for InvalidUri

impl Error for InvalidUriParts

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

impl Error for InvalidNameError

impl Error for hyper::error::Error

impl Error for Errors

impl Error for indexmap::TryReserveError

impl Error for PrefixLenError

impl Error for ipnet::parser::AddrParseError

impl Error for jsonwebtoken::errors::Error

impl Error for InstallError

impl Error for MietteDiagnostic

impl Error for FromStrError

impl Error for EmptyInput

impl Error for ShapeMismatch

impl Error for BinNotFound

impl Error for ShapeError

impl Error for InvalidPart

where InvalidPart: Debug + Display,

impl Error for ReadError

impl Error for rand_core::error::Error

impl Error for ThreadPoolBuildError

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 RelativeToError

impl Error for FromPathError

impl Error for reqwest::error::Error

impl Error for KeyRejected

impl Error for Unspecified

impl Error for NonSortedIntegers

impl Error for NameParseError

impl Error for rocksdb::Error

impl Error for Errno

impl Error for InvalidOutputLen

impl Error for InvalidParams

impl Error for semver::parse::Error

impl Error for serde_content::error::Error

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

impl Error for serde_json::error::Error

impl Error for Whatever

where Whatever: Debug + Display,

impl Error for CorruptionError

impl Error for PathPersistError

impl Error for ComponentRange

impl Error for ConversionRange

impl Error for DifferentVariant

impl Error for InvalidVariant

impl Error for LengthDelimitedCodecError

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

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

impl Error for TryCurrentError

impl Error for JoinError

impl Error for AcquireError

impl Error for tokio::sync::mutex::TryLockError

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

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

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

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

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

impl Error for None

impl Error for SetGlobalDefaultError

impl Error for ParseLevelError

impl Error for ParseLevelFilterError

impl Error for uuid::error::Error

impl Error for walkdir::error::Error

impl<'a> Error for utf8::DecodeError<'a>

impl<'a> Error for BufReadDecoderError<'a>

impl<'a> Error for addr::error::Error<'a>

impl<'a> Error for ValidationError<'a>

impl<'a> Error for ValidationWarning<'a>

impl<'a, E> Error for DecodeStringError<'a, E>

where E: RmpReadErr,

impl<'a, K, V> Error for alloc::collections::btree::map::entry::OccupiedError<'a, K, V>

where K: Debug + Ord, V: Debug,

impl<'a, K, V> Error for 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<'js> Error for CaughtError<'js>

impl<'js> Error for Exception<'js>

impl<E> Error for ValueWriteError<E>

where E: RmpWriteErr,

impl<E> Error for Box<E>

where E: Error,

impl<F> Error for PersistError<F>

impl<I> Error for itertools::exactly_one_err::ExactlyOneError<I>

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

impl<I> Error for itertools::exactly_one_err::ExactlyOneError<I>

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

impl<I> Error for itertools::exactly_one_err::ExactlyOneError<I>

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

impl<K> Error for TcError<K>

where K: Debug + Display, TcError<K>: Debug + Display,

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<L, T, E> Error for lalrpop_util::ParseError<L, T, E>

where L: Debug + Display, T: Debug + Display, E: Debug + Display,

impl<N> Error for ASTNode<N>

where N: Error,

impl<S> Error for ExternalChunkError<S>

where S: Error,

impl<S, D, I> Error for SortError<S, D, I>

where S: Error + 'static, D: Error + 'static, I: Error + 'static,

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

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

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

impl<T> Error for async_channel::TrySendError<T>

impl<T> Error for ciborium::de::error::Error<T>

where T: Debug,

impl<T> Error for ciborium::ser::error::Error<T>

where T: Debug,

impl<T> Error for PushError<T>

where T: Debug,

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

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

impl<T> Error for SetError<T>

where T: Debug,

impl<T> Error for ThinBox<T>

where T: Error + ?Sized,

impl<T> Error for Arc<T>

where T: Error + ?Sized,

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

impl<T> Error for PoisonError<T>

impl<T> Error for CapacityError<T>

where T: Any,

Requires features="std".

impl<T> Error for async_channel::SendError<T>

impl<T> Error for ForcePushError<T>

where T: Debug,

impl<T> Error for futures_channel::mpsc::TrySendError<T>

where T: Any,

impl<T> Error for futures_util::io::split::ReuniteError<T>

where T: Any,

impl<T> Error for PollSendError<T>

where T: Debug,

impl<T> Error for AsyncFdTryNewError<T>

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

where T: Debug,

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

impl<T> Error for 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 futures_util::stream::stream::split::ReuniteError<T, Item>

where T: Any,

impl<W> Error for std::io::buffered::IntoInnerError<W>

where W: Send + Debug,

impl<W> Error for snap::error::IntoInnerError<W>

where W: Any,