Enum Error 

pub enum Error {
    Merge(Error),
    Other(Box<dyn Error + Send + Sync + 'static>),
}

Error returned by Dfs.

Example

use std::io;

let err = Error::Merge(module::merge::Error::collision());
assert_eq!(format!("{err}"), "value collision");
assert_eq!(format!("{err:#}"), "value collision");

let err = Error::other(io::Error::other("invalid data"));
assert_eq!(format!("{err}"), "invalid data");
assert_eq!(format!("{err:#}"), "other error");

Variants

Merge(Error)

An error during the Merge operation.

Other(Box<dyn Error + Send + Sync + 'static>)

An error during some other operation during evaluation.

Implementations

impl Error

pub fn other<E>(error: E) -> Self

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

Create new error from error.

pub fn is_merge(&self) -> bool

Check whether the error is a merge error.

Equivalent to: matches!(self, Self::Merge(_)).

pub fn as_merge(&self) -> Option<&Error>

Get a reference to the inner merge error.

pub fn as_merge_mut(&mut self) -> Option<&mut Error>

Get a mutable reference to the inner merge error.

pub fn is_other(&self) -> bool

Check whether the error is of another kind.

Equivalent to: matches!(self, Self::Other(_)).

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

Get a reference to the inner error.

pub fn as_other_mut(&mut self) -> Option<&mut (dyn Error + 'static)>

Get a mutable reference to the inner error.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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

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

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 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.