Struct Error

pub struct Error { /* private fields */ }

Used as an Error type throughout this library.

Fields

kind – kind of error.

message – optional additional information about the error.

backtrace – stack backtrace of error, created via backtrace.

Implementations

impl Error

pub fn new(kind: ErrorKind, message: Option<String>) -> Self

Method used to construct a new Error.

Also creates a backtrace.

Arguments

kind – kind of error.

message – optional additional information about the error.

Examples

use std::fs::File;
match File::open("does_not_exist.rs") {
    Ok(file) => {
    // Do something with the file.
    }
    Err(e) => {
        return Err(
            Error::new(
               ErrorKind::OpeningFileFailed,
               // Additional information can be provided.
               Some("Failed to open a file.".to_string())
        ))
    }   
}

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.