Enum InitError 

#[non_exhaustive]
pub enum InitError {
    AlreadyInstalled,
    Filter(BuildError),
}

Available on crate feature std only.

Error returned by init_json, init_logfmt and init_human.

Examples

match log_io::init_json() {
    Ok(_guard) => { /* keep the guard alive in `main` */ }
    Err(log_io::InitError::AlreadyInstalled) => { /* someone else set it */ }
    Err(e) => eprintln!("logging not started: {e}"),
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

AlreadyInstalled

A global logger is already installed.

Filter(BuildError)

The LOG_IO environment variable is set but did not parse.

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

Formats the value using the given formatter.

impl Error for InitError

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.