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");

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>

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 + Sync + Send>

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 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 ParseAlphabetError

Available on crate features std only.

impl Error for rustmax::base64::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 BindgenError

impl Error for RoundingError

Available on crate feature std only.

impl Error for MatchesError

impl Error for Infallible

impl Error for FromBytesWithNulError

impl Error for rustmax::core::slice::GetDisjointMutError

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

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

impl Error for rustmax::ctrlc::Error

impl Error for FromHexError

Available on crate feature std only.

impl Error for rustmax::ignore::Error

impl Error for ImageError

impl Error for rustmax::image::flat::Error

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

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

Available on crate feature std only.

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

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for rustmax::regex::Error

Available on crate feature std only.

impl Error for ReadlineError

impl Error for VarError

impl Error for rustmax::std::fs::TryLockError

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

impl Error for rustmax::std::sync::mpmc::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

Available on crate feature std only.

impl Error for ZipError

impl Error for BinaryError

Available on crate feature std only.

impl Error for HuffmanTreeError

impl Error for bzip2::mem::Error

impl Error for codespan_reporting::files::Error

impl Error for exr::error::Error

impl Error for gif::encoder::EncodingError

impl Error for EncodingFormatError

impl Error for gif::reader::decoder::DecodingError

impl Error for AdditionError

impl Error for hdrhistogram::errors::CreationError

impl Error for RecordError

impl Error for SubtractionError

impl Error for httparse::Error

Available on crate feature std only.

impl Error for humantime::date::Error

impl Error for humantime::duration::Error

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 image_webp::decoder::DecodingError

impl Error for image_webp::encoder::EncodingError

impl Error for indexmap::GetDisjointMutError

Available on crate feature std only.

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

impl Error for PollTimeoutTryFromError

impl Error for png::decoder::stream::DecodingError

impl Error for png::encoder::EncodingError

impl Error for ppmd_rust::Error

impl Error for qoi::error::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 InvalidConfig

impl Error for rav1e::api::config::rate::Error

impl Error for EncoderStatus

impl Error for ravif::error::Error

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 rusty_fork::error::Error

impl Error for serde_urlencoded::ser::Error

impl Error for QuoteError

Available on crate feature std only.

impl Error for slab::GetDisjointMutError

Available on crate feature std only.

impl Error for StrSimError

impl Error for TiffError

impl Error for time::error::Error

impl Error for tinystr::error::ParseError

impl Error for AnyDelimiterCodecError

impl Error for LinesCodecError

impl Error for SerializerError

Available on crate feature std only.

impl Error for tungstenite::error::CapacityError

impl Error for tungstenite::error::Error

impl Error for ProtocolError

impl Error for SubProtocolError

impl Error for TlsError

impl Error for UrlError

impl Error for ucd_trie::owned::Error

impl Error for LzwError

Available on crate feature std only.

impl Error for ZeroTrieBuildError

impl Error for UleError

impl Error for DecodeErrors

Available on crate feature std only.

impl Error for !

impl Error for UnorderedKeyError

impl Error for rustmax::alloc::collections::TryReserveError

impl Error for FromVecWithNulError

impl Error for IntoStringError

impl Error for NulError

impl Error for rustmax::alloc::string::FromUtf8Error

impl Error for FromUtf16Error

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 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 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 rustmax::axum::Error

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

Available on crate feature std only.

impl Error for HexError

Available on crate feature std only.

impl Error for TryGetError

Available on crate feature std only.

impl Error for rustmax::cc::Error

impl Error for OutOfRange

Available on crate feature std only.

impl Error for OutOfRangeError

Available on crate feature std only.

impl Error for rustmax::chrono::ParseError

Available on crate feature std only.

impl Error for ParseMonthError

Available on crate feature std only.

impl Error for ParseWeekdayError

Available on crate feature std only.

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 FromBytesUntilNulError

impl Error for rustmax::core::fmt::Error

impl Error for rustmax::core::net::AddrParseError

impl Error for ParseFloatError

impl Error for rustmax::core::num::ParseIntError

impl Error for rustmax::core::num::TryFromIntError

impl Error for ParseBoolError

impl Error for rustmax::core::str::Utf8Error

impl Error for TryFromFloatSecsError

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

impl Error for SelectTimeoutError

impl Error for TrySelectError

impl Error for Exception

Available on error_in_core or crate feature std only.

impl Error for CompressError

impl Error for DecompressError

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

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

impl Error for Canceled

Available on crate feature std only.

impl Error for EnterError

impl Error for rustmax::futures::io::Error

impl Error for SpawnError

Available on crate feature std only.

impl Error for rustmax::glob::GlobError

impl Error for PatternError

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 rustmax::http::Error

impl Error for InvalidUri

impl Error for InvalidUriParts

impl Error for rustmax::hyper::Error

impl Error for rustmax::image::error::DecodingError

impl Error for rustmax::image::error::EncodingError

impl Error for LimitError

impl Error for ParameterError

impl Error for UnsupportedError

impl Error for TemplateError

impl Error for rustmax::jiff::Error

Available on crate feature std only.

impl Error for rustmax::json5::Error

impl Error for rustmax::log::ParseLevelError

Available on crate feature std only.

impl Error for SetLoggerError

Available on crate feature std only.

impl Error for rustmax::mime::FromStrError

impl Error for rustmax::notify::Error

impl Error for ParseBigIntError

Available on crate feature std only.

impl Error for Aborted

Available on crate feature std only.

impl Error for rustmax::proc_macro2::LexError

impl Error for ExpandError

impl Error for rustmax::proc_macro::LexError

impl Error for Empty

Available on crate feature std only.

impl Error for OsError

Available on crate feature std only.

impl Error for ThreadPoolBuildError

impl Error for rustmax::reqwest::Error

impl Error for rustmax::semver::Error

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for rustmax::serde_json::Error

impl Error for InvalidBufferSize

Available on crate feature std only.

impl Error for InvalidLength

Available on crate feature std only.

impl Error for InvalidOutputSize

Available on crate feature std only.

impl Error for MacError

Available on crate feature std only.

impl Error for JoinPathsError

impl Error for WriterPanicked

impl Error for NormalizeError

impl Error for StripPrefixError

impl Error for ExitStatusError

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

impl Error for AccessError

impl Error for SystemTimeError

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

Available on crate feature std only.

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

Available on crate feature std only.

impl Error for DatetimeParseError

Available on crate feature std only.

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 DateTimeRangeError

impl Error for rustmax::derive_more::FromStrError

Available on crate feature std only.

impl Error for UnitError

Available on crate feature std only.

impl Error for WrongVariantError

Available on crate feature std only.

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 KeyRejected

impl Error for Unspecified

impl Error for bstr::ext_vec::FromUtf8Error

Available on crate feature std only.

impl Error for bstr::utf8::Utf8Error

Available on crate feature std only.

impl Error for chrono_tz::timezones::ParseError

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 getrandom::error::Error

impl Error for getrandom::error::Error

impl Error for DecodingFormatError

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 DataError

impl Error for Errors

Available on crate feature std only.

impl Error for indexmap::TryReserveError

Available on crate feature std only.

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 ParseRatioError

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 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 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 rustix::backend::io::errno::Errno

Available on crate feature std or error_in_core only.

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

Available on crate feature std only.

impl Error for rustls_native_certs::Error

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 ComponentRange

impl Error for ConversionRange

impl Error for DifferentVariant

impl Error for InvalidVariant

impl Error for LengthDelimitedCodecError

impl Error for SetGlobalDefaultError

Available on crate feature std only.

impl Error for tracing_core::metadata::ParseLevelError

Available on crate feature std only.

impl Error for ParseLevelFilterError

Available on crate feature std only.

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

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

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

where K: Debug + Ord, V: Debug,

impl<'a, K, V, A> Error for rustmax::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 rustmax::nom::Err<E>

where E: Debug,

Available on crate feature std only.

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

where E: Debug,

Available on 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<Enum> Error for TryFromPrimitiveError<Enum>

where Enum: TryFromPrimitive,

Available on crate feature std only.

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

where F: ErrorFormatter,

impl<F> Error for PersistError<F>

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

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

Available on crate feature use_std only.

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

where I: Debug + Display,

Available on crate feature std only.

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

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

Available on crate feature use_std only.

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

where I: Debug + Display,

Available on crate feature std only.

impl<I> Error for VerboseError<I>

where I: Debug + Display,

Available on crate feature std only.

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,

Available on crate features use_std only.

Either implements Error if both L and R implement it.

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<Role> Error for 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 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,

Available on crate feature std only.

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::mpmc::TrySendError<T>

impl<T> Error for rustmax::std::sync::oneshot::RecvTimeoutError<T>

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

impl<T> Error for SetError<T>

where T: Debug,

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

Available on crate feature time only.

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

impl<T> Error for ThinBox<T>

where T: Error + ?Sized,

impl<T> Error for Arc<T>

where T: Error + ?Sized,

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

where T: Send,

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,

Available on crate feature std only.

impl<T> Error for TryFromBigIntError<T>

where T: Debug,

Available on crate feature std only.

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

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> Error for TryFromReprError<T>

where T: Debug,

Available on crate feature std only.

impl<T> Error for TryIntoError<T>

where T: Debug,

Available on crate feature std only.

impl<T> Error for TryUnwrapError<T>

where T: Debug,

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 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, 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 rustmax::prelude::stream::ReuniteError<T, Item>

where T: Any,

Available on crate feature std only.

impl<W> Error for IntoInnerError<W>

where W: Send + Debug,