Enum fern::InitError

pub enum InitError {
    Io(Error),
    SetLoggerError(SetLoggerError),
}

Convenience error combining possible errors which could occur while initializing logging.

Fern does not use this error natively, but functions which set up fern and open log files will often need to return both io::Error and SetLoggerError. This error is for that purpose.

Variants

Io(Error)

IO error.

SetLoggerError(SetLoggerError)

The log crate's global logger was already initialized when trying to initialize a logger.

Trait Implementations

impl Debug for InitError

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

Formats the value using the given formatter.

impl Display for InitError

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

Formats the value using the given formatter.

impl Error for InitError

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

The lower-level source of this error, if any.

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

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

impl From<Error> for InitError

fn from(error: Error) -> InitError

Performs the conversion.

impl From<SetLoggerError> for InitError

fn from(error: SetLoggerError) -> InitError

Performs the conversion.