Trait ErrorTrait 

pub trait ErrorTrait: 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");

Error source

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.

In error types that wrap an underlying error, the underlying error should be either returned by the outer error’s Error::source(), or rendered by the outer error’s Display implementation, but not both.

Example

Implementing the Error trait only requires that Debug and Display are implemented too.

use std::error::Error;
use std::fmt;
use std::path::PathBuf;

#[derive(Debug)]
struct ReadConfigError {
    path: PathBuf
}

impl fmt::Display for ReadConfigError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let path = self.path.display();
        write!(f, "unable to read configuration at {path}")
    }
}

impl Error for ReadConfigError {}

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

Available on non-no_global_oom_handling only.

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

Converts a str into a box of dyn Error.

Examples

use std::error::Error;

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

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

Available on non-no_global_oom_handling only.

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;

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

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

Available on non-no_global_oom_handling only.

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::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!(size_of::<Box<dyn Error>>() == size_of_val(&a_boxed_error))

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

Available on non-no_global_oom_handling only.

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::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!(
    size_of::<Box<dyn Error + Send + Sync>>() == size_of_val(&a_boxed_error))

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

where E: Error + 'a,

Available on non-no_global_oom_handling only.

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;

#[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 == size_of_val(&an_error));
let a_boxed_error = Box::<dyn Error>::from(an_error);
assert!(size_of::<Box<dyn Error>>() == size_of_val(&a_boxed_error))

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

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

Available on non-no_global_oom_handling only.

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;

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

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

Available on non-no_global_oom_handling only.

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

Converts a String into a box of dyn Error.

Examples

use std::error::Error;

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

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

Available on non-no_global_oom_handling only.

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;

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

impl Pointee for dyn Error

type Metadata = DynMetadata<dyn Error>

The metadata type for pointers and references to this type.

impl Pointee for dyn Error + Send

type Metadata = DynMetadata<dyn Error + Send>

The metadata type for pointers and references to this type.

impl Pointee for dyn Error + Sync + Send

type Metadata = DynMetadata<dyn Error + Sync + Send>

The metadata type for pointers and references to this type.

impl Pointee for dyn Error + Sync

type Metadata = DynMetadata<dyn Error + Sync>

The metadata type for pointers and references to this type.

impl Value for dyn Error

Available on crate feature std only.

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

Visits this value with the given Visitor.

impl Value for dyn Error + Send

Available on crate feature std only.

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

Visits this value with the given Visitor.

impl Value for dyn Error + Sync + Send

Available on crate feature std only.

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

Visits this value with the given Visitor.

impl Value for dyn Error + Sync

Available on crate feature std only.

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

Visits this value with the given Visitor.

Implementors

impl !Error for &str

impl Error for Infallible

impl Error for FromBytesWithNulError

impl Error for core::slice::GetDisjointMutError

impl Error for VarError

impl Error for std::fs::TryLockError

impl Error for RecvTimeoutError

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

impl Error for arbitrary::error::Error

impl Error for base64::alphabet::ParseAlphabetError

Available on crate features std only.

impl Error for base64::alphabet::ParseAlphabetError

Available on crate features std only.

impl Error for base64::decode::DecodeError

Available on crate features std only.

impl Error for base64::decode::DecodeError

Available on crate features std only.

impl Error for base64::decode::DecodeSliceError

Available on crate features std only.

impl Error for base64::decode::DecodeSliceError

Available on crate features std only.

impl Error for base64::encode::EncodeSliceError

Available on crate features std only.

impl Error for base64::encode::EncodeSliceError

Available on crate features std only.

impl Error for BuiltinPluginBuilderError

impl Error for CardinalConfigBuilderError

impl Error for DestinationBuilderError

impl Error for DestinationMatchBuilderError

impl Error for DestinationRetryBuilderError

impl Error for DestinationTimeoutsBuilderError

impl Error for HealthCheckBuilderError

impl Error for MiddlewareBuilderError

impl Error for RouteBuilderError

impl Error for ServerConfigBuilderError

impl Error for WasmPluginConfigBuilderError

impl Error for CardinalError

impl Error for CardinalInternalError

impl Error for CardinalProxyError

impl Error for RoundingError

Available on crate feature std only.

impl Error for MatchesError

impl Error for ConfigError

impl Error for DataValueCastFailure

impl Error for LookupError

impl Error for RegisterMappingError

impl Error for CodegenError

impl Error for cranelift_codegen::settings::SetError

impl Error for gimli::read::Error

Available on crate feature std only.

impl Error for gimli::write::convert::ConvertError

impl Error for gimli::write::Error

impl Error for FromHexError

Available on crate feature std only.

impl Error for httparse::Error

Available on crate feature std only.

impl Error for GetTimezoneError

impl Error for indexmap::GetDisjointMutError

Available on crate feature std only.

impl Error for json5::error::Error

impl Error for local_ip_address::error::Error

impl Error for InsertError

impl Error for matchit::error::MatchError

impl Error for DeError

impl Error for SerError

impl Error for WrappedError

impl Error for Errno

impl Error for prometheus::errors::Error

impl Error for ProtobufError

impl Error for Panic

impl Error for rand::distr::bernoulli::BernoulliError

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for rand::distr::weighted::Error

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for WeightedError

Available on crate feature std only.

impl Error for RegAllocError

Available on crate feature std only.

impl Error for StartError

Available on crate feature std only.

impl Error for regex_syntax::error::Error

Available on crate feature std only.

impl Error for regex::error::Error

Available on crate feature std only.

impl Error for region::error::Error

impl Error for rmp_serde::decode::Error

impl Error for rmp_serde::encode::Error

impl Error for BytesReadError

Available on crate feature std only.

impl Error for NumValueReadError

Available on crate feature std only.

impl Error for ValueReadError

Available on crate feature std only.

impl Error for ron::error::Error

impl Error for ini::Error

impl Error for LiteralsSectionParseError

impl Error for SequencesHeaderParseError

impl Error for GetBitsError

impl Error for BlockHeaderReadError

impl Error for BlockSizeError

impl Error for BlockTypeError

impl Error for DecodeBlockContentError

impl Error for DecompressBlockError

impl Error for DecodebufferError

impl Error for DictionaryDecodeError

impl Error for DecompressLiteralsError

impl Error for ExecuteSequencesError

impl Error for DecodeSequenceError

impl Error for FrameDescriptorError

impl Error for FrameHeaderError

impl Error for ReadFrameHeaderError

impl Error for FrameDecoderError

impl Error for FSEDecoderError

impl Error for FSETableError

impl Error for HuffmanDecoderError

impl Error for HuffmanTableError

impl Error for MmapError

impl Error for slab::GetDisjointMutError

Available on crate feature std only.

impl Error for StrSimError

impl Error for strum::ParseError

Available on crate feature std only.

impl Error for time::error::Error

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 SerializerError

Available on crate feature std only.

impl Error for ts_rs::export::error::ExportError

impl Error for ucd_trie::owned::Error

impl Error for wasmer_compiler::engine::error::InstantiationError

impl Error for wasmer_compiler::engine::error::LinkError

impl Error for ObjectError

impl Error for CompileError

impl Error for wasmer_types::error::DeserializeError

impl Error for ImportError

impl Error for MemoryError

impl Error for ParseCpuFeatureError

impl Error for PreInstantiationError

impl Error for wasmer_types::error::SerializeError

impl Error for WasmError

impl Error for TrapCode

impl Error for WaiterError

impl Error for Trap

impl Error for wasmer::entities::exports::ExportError

impl Error for IoCompileError

impl Error for BackendTrap

impl Error for AtomicsError

impl Error for wasmer::error::InstantiationError

impl Error for wasmer::error::LinkError

impl Error for MemoryAccessError

impl Error for yaml_rust2::emitter::EmitError

impl Error for yaml_rust::emitter::EmitError

impl Error for !

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::fmt::Error

impl Error for 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 core::str::error::Utf8Error

impl Error for TryFromFloatSecsError

impl Error for JoinPathsError

impl Error for WriterPanicked

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

impl Error for NormalizeError

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

Available on crate feature std only.

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

Available on crate feature std only.

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

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for MaxRecursionReached

impl Error for TryGetError

Available on crate feature std only.

impl Error for cf_rustracing::error::Error

impl Error for chrono::format::ParseError

Available on crate features core-error or std only.

impl Error for ParseMonthError

Available on crate feature std only.

impl Error for OutOfRange

Available on crate feature std only.

impl Error for OutOfRangeError

Available on crate features std or core-error only.

impl Error for ParseWeekdayError

Available on crate feature std only.

impl Error for clap::error::Error

impl Error for VerifierError

impl Error for VerifierErrors

impl Error for InvalidLength

Available on crate feature std only.

impl Error for daemonize::error::Error

impl Error for deranged::ParseIntError

impl Error for deranged::TryFromIntError

impl Error for UninitializedFieldError

Available on crate feature std only.

impl Error for MacError

Available on crate feature std only.

impl Error for InvalidBufferSize

Available on crate feature std only.

impl Error for InvalidOutputSize

Available on crate feature std only.

impl Error for erased_serde::error::Error

impl Error for CompressError

impl Error for DecompressError

impl Error for futures_channel::mpsc::SendError

impl Error for futures_channel::mpsc::TryRecvError

impl Error for Canceled

Available on crate feature std only.

impl Error for EnterError

impl Error for SpawnError

Available on crate feature std only.

impl Error for Aborted

Available on crate feature std only.

impl Error for getrandom::error::Error

impl Error for getrandom::error::Error

impl Error for h2::error::Error

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 httpdate::Error

impl Error for indexmap::TryReserveError

Available on crate feature std only.

impl Error for MergeError

impl Error for ClearEnvError

impl Error for object::read::Error

Available on non-crate feature std and core_error only.

impl Error for object::read::Error

Available on crate feature std only.

impl Error for object::write::Error

Available on crate feature std only.

impl Error for EncodingError

impl Error for BoxedError

impl Error for rancor::Error

impl Error for rancor::Failure

impl Error for Empty

Available on crate feature std only.

impl Error for ReadError

impl Error for rand_core::error::Error

Available on crate feature std only.

impl Error for OsError

Available on crate feature std only.

impl Error for ThreadPoolBuildError

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

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for CacheError

Available on crate feature std only.

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

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for GroupInfoError

Available on crate feature std only.

impl Error for UnicodeWordBoundaryError

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for SmallIndexError

Available on crate feature std only.

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

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for PatternSetInsertError

Available on crate feature std only.

impl Error for regex_automata::util::wire::DeserializeError

Available on crate feature std only.

impl Error for regex_automata::util::wire::SerializeError

Available on crate feature std only.

impl Error for regex_syntax::ast::Error

Available on crate feature std only.

impl Error for regex_syntax::hir::Error

Available on crate feature std only.

impl Error for CaseFoldError

Available on crate feature std only.

impl Error for UnicodeWordError

Available on crate feature std only.

impl Error for IteratorLengthMismatch

impl Error for SpannedError

impl Error for ini::ParseError

impl Error for serde_untagged::error::Error

impl Error for serde_core::de::value::Error

Available on crate feature std only.

impl Error for serde_json::error::Error

impl Error for serde_yaml::error::Error

impl Error for simdutf8::basic::Utf8Error

Available on crate feature std only.

impl Error for simdutf8::compat::Utf8Error

Available on crate feature std only.

impl Error for ColorChoiceParseError

impl Error for ParseColorError

impl Error for thrift_codec::error::Error

impl Error for ComponentRange

impl Error for ConversionRange

impl Error for DifferentVariant

impl Error for InvalidVariant

impl Error for tokio_stream::stream_ext::timeout::Elapsed

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 toml::de::error::Error

Available on crate feature std only.

impl Error for toml::ser::error::Error

Available on crate feature std only.

impl Error for DatetimeParseError

Available on crate feature std only.

impl Error for SetGlobalDefaultError

Available on crate feature std only.

impl Error for ParseLevelError

Available on crate feature std only.

impl Error for ParseLevelFilterError

Available on crate feature std only.

impl Error for trackable::error::Failure

impl Error for IoError

impl Error for TopLevelError

impl Error for walkdir::error::Error

impl Error for MiddlewareError

impl Error for PageCountOutOfRange

impl Error for RuntimeError

impl Error for BinaryReaderError

Available on non-crate feature std and core_error only.

impl Error for wast::error::Error

impl Error for wat::Error

impl Error for yaml_rust2::scanner::ScanError

impl Error for yaml_rust::scanner::ScanError

impl Error for cardinal_proxy::pingora::prelude::Elapsed

impl Error for ConnectProxyError

impl Error for cardinal_proxy::pingora::Error

impl Error for cardinal_proxy::pingora::tls::error::Error

impl Error for ErrorStack

impl Error for cardinal_proxy::pingora::tls::ssl::Error

impl Error for X509VerifyResult

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

where E: RmpReadErr,

Available on crate feature std only.

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<A, S, V> Error for zerocopy::error::ConvertError<A, S, V>

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

Available on zerocopy_core_error_1_81_0 or crate feature std only.

impl<E> Error for ValueWriteError<E>

where E: RmpWriteErr,

Available on crate feature std only.

impl<E> Error for Box<E>

where E: Error,

impl<I> Error for ExactlyOneError<I>

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

Available on crate feature use_std only.

impl<I> Error for InputError<I>

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

Available on crate feature std only.

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

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

Available on crate feature std only.

impl<K> Error for TrackableError<K>

where K: ErrorKind,

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

where L: Error, R: Error,

Available on crate features std only.

Either implements Error if both L and R implement it.

Requires crate feature "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 HandshakeError<S>

where S: Debug,

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

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

Available on zerocopy_core_error_1_81_0 or crate feature std only.

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

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

Available on zerocopy_core_error_1_81_0 or crate feature std only.

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

where Dst: KnownLayout + TryFromBytes + ?Sized,

Available on zerocopy_core_error_1_81_0 or crate feature std only.

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 tokio::sync::mpsc::error::SendTimeoutError<T>

Available on crate feature time only.

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

impl<T> Error for tokio::sync::once_cell::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 arraydeque::error::CapacityError<T>

Available on crate feature std only.

impl<T> Error for arrayvec::errors::CapacityError<T>

where T: Any,

Available on crate feature std only.

Requires features="std".

impl<T> Error for InvalidEnumDiscriminantError<T>

where T: Debug + Display,

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,

Available on crate feature std only.

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 SetOnceError<T>

where T: Debug,

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

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

where E: Debug + Display,

Available on crate feature std only.

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

where E: Debug + Display,

Available on crate feature std only.

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

where T: Any,

Available on crate feature std only.

impl<T, P> Error for NlError<T, P>

where T: Debug, P: Debug,

impl<T, P> Error for Nlmsgerr<T, P>

where T: Debug, P: Debug,

impl<W> Error for IntoInnerError<W>

where W: Send + Debug,