Trait StdError 

pub trait StdError: 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>) { ... }
}

Available on crate feature fullstack only.

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());
}

Delegating Impls

Warning: We recommend implementors avoid delegating implementations of provide to source error implementations.

This method should expose context from the current piece of the source chain only, not from sources that are exposed in the chain of sources. Delegating provide implementations cause the same context to be provided by multiple errors in the chain of sources which can cause unintended duplication of information in error reports or require heuristics to deduplicate.

In other words, the following implementation pattern for provide is discouraged and should not be used for Error types exposed in public APIs to third parties.

struct MyError {
    source: Error,
}

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

    fn provide<'a>(&'a self, request: &mut Request<'a>) {
        self.source.provide(request) // <--- Discouraged
    }
}

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 AsRef<dyn Error> for Error

Available on crate feature std or non-anyhow_no_core_error only.

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

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

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

Available on crate feature std or non-anyhow_no_core_error only.

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

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

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 From<Error> for Box<dyn Error>

Available on crate feature std or non-anyhow_no_core_error only.

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

Converts to this type from the input type.

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

Available on crate feature std or non-anyhow_no_core_error only.

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

Converts to this type from the input type.

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

Available on crate feature std or non-anyhow_no_core_error only.

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

Converts to this type from the input type.

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 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 AssetPathError

impl Error for AssetResolveError

impl Error for NativeAssetResolveError

impl Error for AssetServeError

impl Error for MountedError

impl Error for ResizeError

impl Error for VisibleError

impl Error for IncrementalRendererError

impl Error for EvalError

impl Error for dioxus::prelude::BorrowError

impl Error for dioxus::prelude::BorrowMutError

impl Error for ServerFnError

impl Error for CborRejection

impl Error for RequestError

impl Error for StreamingError

impl Error for TakeDataError

impl Error for WebsocketError

impl Error for MultipartRejection

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 WebSocketUpgradeRejection

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 std::sync::mpsc::RecvTimeoutError

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

impl Error for HostRejection

impl Error for ParseAlphabetError

Available on crate features std only.

impl Error for base64::decode::DecodeError

Available on crate features std only.

impl Error for DecodeSliceError

Available on crate features std only.

impl Error for EncodeSliceError

Available on crate features std only.

impl Error for RoundingError

Available on crate feature std only.

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

impl Error for cookie::parse::ParseError

impl Error for cookie_store::cookie::Error

impl Error for LiveViewError

impl Error for futures_channel::mpsc::TryRecvError

impl Error for gloo_net::error::Error

impl Error for WebSocketError

impl Error for hashbrown::TryReserveError

impl Error for RangeUnsatisfiableError

impl Error for httparse::Error

Available on crate feature std only.

impl Error for GetTimezoneError

impl Error for icu_collections::codepointtrie::error::Error

impl Error for icu_locale_core::parser::errors::ParseError

impl Error for PreferencesParseError

impl Error for indexmap::GetDisjointMutError

impl Error for libloading::error::Error

impl Error for InsertError

impl Error for matchit::error::MatchError

impl Error for multer::error::Error

impl Error for 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 StartError

Available on crate feature std only.

impl Error for regex_syntax::error::Error

Available on crate feature std only.

impl Error for rustls_pki_types::pem::Error

Available on crate feature std only.

impl Error for webpki::error::Error

Available on crate feature std only.

impl Error for EarlyDataError

Available on crate feature std only.

impl Error for EncodeError

Available on crate feature std only.

impl Error for EncryptError

Available on crate feature std only.

impl Error for rustls::error::Error

Available on crate feature std only.

impl Error for VerifierBuilderError

Available on crate feature std only.

impl Error for serde_qs::error::Error

impl Error for serde_urlencoded::ser::Error

impl Error for slab::GetDisjointMutError

Available on crate feature std only.

impl Error for PatchError

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 tinystr::error::ParseError

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 tungstenite::error::CapacityError

impl Error for tungstenite::error::CapacityError

impl Error for tungstenite::error::CapacityError

impl Error for tungstenite::error::Error

impl Error for tungstenite::error::Error

impl Error for tungstenite::error::Error

impl Error for tungstenite::error::ProtocolError

impl Error for tungstenite::error::ProtocolError

impl Error for tungstenite::error::ProtocolError

impl Error for tungstenite::error::SubProtocolError

impl Error for tungstenite::error::SubProtocolError

impl Error for tungstenite::error::SubProtocolError

impl Error for tungstenite::error::TlsError

impl Error for tungstenite::error::TlsError

impl Error for tungstenite::error::TlsError

impl Error for tungstenite::error::UrlError

impl Error for tungstenite::error::UrlError

impl Error for tungstenite::error::UrlError

impl Error for url::parser::ParseError

Available on crate feature std only.

impl Error for ZeroTrieBuildError

impl Error for UleError

impl Error for !

impl Error for WebAssetResolveError

impl Error for HttpError

impl Error for dioxus::prelude::dioxus_fullstack::axum_core::Error

impl Error for InvalidBoundary

impl Error for MultipartError

impl Error for FailedToDeserializePathParams

impl Error for InvalidUtf8InPathParam

impl Error for FailedToDeserializeForm

impl Error for FailedToDeserializeFormBody

impl Error for FailedToDeserializeQueryString

impl Error for InvalidFormContentType

impl Error for InvalidUtf8

impl Error for JsonDataError

impl Error for JsonSyntaxError

impl Error for dioxus::prelude::dioxus_fullstack::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 ConnectionNotUpgradable

impl Error for InvalidConnectionHeader

impl Error for InvalidProtocolPseudoheader

impl Error for InvalidUpgradeHeader

impl Error for InvalidWebSocketVersionHeader

impl Error for MethodNotConnect

impl Error for MethodNotGet

impl Error for WebSocketKeyHeaderMissing

impl Error for dioxus::prelude::dioxus_fullstack::headers::Error

impl Error for InvalidHeaderName

impl Error for InvalidHeaderValue

impl Error for MaxSizeReached

impl Error for ToStrError

impl Error for InvalidMethod

impl Error for InvalidStatusCode

impl Error for dioxus::prelude::dioxus_fullstack::http::Error

impl Error for InvalidUri

impl Error for InvalidUriParts

impl Error for dioxus::prelude::dioxus_fullstack::reqwest::Error

impl Error for dioxus::prelude::dioxus_fullstack::serde::de::value::Error

Available on crate feature std only.

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 core::cell::BorrowError

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

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

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

impl Error for ParseFloatError

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 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 FailedToResolveHost

impl Error for TypedHeaderRejection

impl Error for TryGetError

Available on crate feature std only.

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 IdnaErrors

impl Error for InvalidLength

Available on crate feature std only.

impl Error for data_encoding::DecodeError

Available on crate feature std only.

impl Error for SpecificationError

Available on crate feature std only.

impl Error for deranged::ParseIntError

impl Error for deranged::TryFromIntError

impl Error for InvalidBufferSize

Available on crate feature std only.

impl Error for InvalidOutputSize

Available on crate feature std only.

impl Error for ParseRouteError

impl Error for futures_channel::mpsc::RecvError

impl Error for futures_channel::mpsc::SendError

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 AlreadyBorrowedError

impl Error for AlreadyBorrowedMutError

impl Error for ValueDroppedError

impl Error for getrandom::error::Error

impl Error for JsError

impl Error for NotJsError

impl Error for h2::error::Error

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 hyper::error::Error

impl Error for DataError

impl Error for Errors

Available on crate feature std only.

impl Error for indexmap::TryReserveError

impl Error for PrefixLenError

impl Error for ipnet::parser::AddrParseError

impl Error for CapacityOverflowError

Available on crate feature std only.

impl Error for iri_string::normalize::error::Error

Available on crate feature std only.

impl Error for iri_string::template::error::Error

Available on crate feature std only.

impl Error for iri_string::validate::Error

Available on crate feature std only.

impl Error for js_sys::TryFromIntError

Available on crate feature std only.

impl Error for UnrecognizedCodeError

impl Error for UnrecognizedKeyError

impl Error for FromStrError

impl Error for Empty

Available on crate feature std only.

impl Error for OsError

Available on crate feature std only.

impl Error for regex_automata::dfa::dense::BuildError

Available on crate features std and dfa-build 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 PatternIDError

Available on crate feature std only.

impl Error for SmallIndexError

Available on crate feature std only.

impl Error for 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 DeserializeError

Available on crate feature std only.

impl Error for 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 rustls_pki_types::server_name::AddrParseError

Available on crate feature std only.

impl Error for InvalidDnsNameError

Available on crate feature std only.

impl Error for UnsupportedOperationError

Available on crate feature std only.

impl Error for OtherError

Available on crate feature std only.

impl Error for serde_wasm_bindgen::error::Error

impl Error for serde_json::error::Error

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 InvalidBackoff

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

impl Error for None

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 tracing_subscriber::filter::directive::ParseError

Available on crate feature std only.

impl Error for BadName

impl Error for FromEnvError

impl Error for tracing_subscriber::reload::Error

impl Error for TryInitError

Available on crate feature std only.

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

where K: Debug + Ord, V: Debug,

impl<'a, K, V, A> Error for std::collections::hash::map::OccupiedError<'a, K, V, A>

where K: Debug, V: Debug, A: Allocator,

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,

Available on non-no_zerocopy_core_error_1_81_0 or crate feature std only.

impl<E> Error for Box<E>

where E: Error,

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

where E: Error,

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, V> Error for TryIntoHeaderError<K, V>

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

impl<Role> Error for tungstenite::handshake::HandshakeError<Role>

where Role: HandshakeRole,

impl<Role> Error for tungstenite::handshake::HandshakeError<Role>

where Role: HandshakeRole,

impl<Role> Error for tungstenite::handshake::HandshakeError<Role>

where Role: HandshakeRole,

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

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

Available on non-no_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 non-no_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 non-no_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::oneshot::RecvTimeoutError<T>

impl<T> Error for std::sync::oneshot::TryRecvError<T>

impl<T> Error for std::sync::poison::TryLockError<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 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 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 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 iri_string::template::error::CreationError<T>

where T: Debug,

Available on crate feature std only.

impl<T> Error for iri_string::types::generic::error::CreationError<T>

where T: Debug,

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<W> Error for IntoInnerError<W>

where W: Send + Debug,