Struct env_logger::Logger[][src]

pub struct Logger { /* fields omitted */ }

The env logger.

This struct implements the Log trait from the log crate, which allows it to act as a logger.

The init(), try_init(), Builder::init() and Builder::try_init() methods will each construct a Logger and immediately initialize it as the default global logger.

If you'd instead need access to the constructed Logger, you can use the associated Builder and install it with the log crate directly.


impl Logger[src]

pub fn from_env<'a, E>(env: E) -> Self where
    E: Into<Env<'a>>, 

Creates the logger from the environment.

The variables used to read configuration from can be tweaked before passing in.


Create a logger reading the log filter from an environment variable called MY_LOG:

use env_logger::Logger;

let logger = Logger::from_env("MY_LOG");

Create a logger using the MY_LOG variable for filtering and MY_LOG_STYLE for whether or not to write styles:

use env_logger::{Logger, Env};

let env = Env::new().filter_or("MY_LOG", "info").write_style_or("MY_LOG_STYLE", "always");

let logger = Logger::from_env(env);

pub fn from_default_env() -> Self[src]

Creates the logger from the environment using default variable names.

This method is a convenient way to call from_env(Env::default()) without having to use the Env type explicitly. The logger will use the default environment variables.


Creates a logger using the default environment variables:

use env_logger::Logger;

let logger = Logger::from_default_env();

pub fn filter(&self) -> LevelFilter[src]

Returns the maximum LevelFilter that this env logger instance is configured to output.

pub fn matches(&self, record: &Record<'_>) -> bool[src]

Checks if this record matches the configured filter.

Trait Implementations

impl Debug for Logger[src]

impl Log for Logger[src]

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.