Struct Error

pub struct Error(pub ErrorKind, pub State);

The Error type.

This struct is made of three things:

• ErrorKind which is used to determine the type of the error.
• a backtrace, generated when the error is created.
• an error chain, used for the implementation of Error::cause().

Tuple Fields

0: ErrorKind

The kind of the error.

1: State

Contains the error chain and the backtrace.

Implementations

impl Error

pub fn from_kind(kind: ErrorKind) -> Self

Constructs an error from a kind, and generates a backtrace.

pub fn with_chain<__E, __K>(error: __E, kind: __K) -> Self

where __E: Error + Send + 'static, __K: Into<ErrorKind>,

Constructs a chained error from another error and a kind, and generates a backtrace.

pub fn with_boxed_chain<__K>(error: Box<dyn Error + Send>, kind: __K) -> Error

where __K: Into<ErrorKind>,

Constructs a chained error from another boxed error and a kind, and generates a backtrace

pub fn kind(&self) -> &ErrorKind

Returns the kind of the error.

pub fn iter(&self) -> Iter<'_>

Iterates over the error chain.

pub fn backtrace(&self) -> Option<&Backtrace>

Returns the backtrace associated with this error.

pub fn chain_err<__F, __EK>(self, error: __F) -> Self

where __F: FnOnce() -> __EK, __EK: Into<ErrorKind>,

Extends the error chain with a new entry.

Methods from Deref<Target = ErrorKind>

pub fn description(&self) -> &str

A string describing the error kind.

Trait Implementations

impl ChainedError for Error

type ErrorKind = ErrorKind

Associated kind type.

fn from_kind(kind: Self::ErrorKind) -> Self

Constructs an error from a kind, and generates a backtrace.

fn with_chain<__E, __K>(error: __E, kind: __K) -> Self

where __E: Error + Send + 'static, __K: Into<Self::ErrorKind>,

Constructs a chained error from another error and a kind, and generates a backtrace.

fn kind(&self) -> &Self::ErrorKind

Returns the kind of the error.

fn iter(&self) -> Iter<'_>

Iterates over the error chain.

fn backtrace(&self) -> Option<&Backtrace>

Returns the backtrace associated with this error.

fn chain_err<__F, __EK>(self, error: __F) -> Self

where __F: FnOnce() -> __EK, __EK: Into<Self::ErrorKind>,

Extends the error chain with a new entry.

fn display_chain<'a>(&'a self) -> DisplayChain<'a, Self>

Returns an object which implements Display for printing the full context of this error.

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for Error

type Target = ErrorKind

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Display for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn description(&self) -> &str

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

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

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

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

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

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.

impl From<Error> for Error

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for ErrorKind

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<ErrorKind> for Error

fn from(kind: ErrorKind) -> Self

Converts to this type from the input type.

impl<'a> From<PoisonError<MutexGuard<'a, Process>>> for Error

fn from(err: PoisonError<MutexGuard<'a, Process>>) -> Error

Converts to this type from the input type.

impl<'a> From<PoisonError<MutexGuard<'a, Thread>>> for Error

fn from(err: PoisonError<MutexGuard<'a, Thread>>) -> Error

Converts to this type from the input type.