Struct env_logger::Env

source ·
pub struct Env<'a> { /* private fields */ }
Expand description

Set of environment variables to configure from.

Default environment variables

By default, the Env will read the following environment variables:

  • RUST_LOG: the level filter
  • RUST_LOG_STYLE: whether or not to print styles with records.

These sources can be configured using the builder methods on Env.

Implementations§

source§

impl<'a> Env<'a>

source

pub fn new() -> Self

Get a default set of environment variables.

source

pub fn filter<E>(self, filter_env: E) -> Selfwhere E: Into<Cow<'a, str>>,

Specify an environment variable to read the filter from.

source

pub fn filter_or<E, V>(self, filter_env: E, default: V) -> Selfwhere E: Into<Cow<'a, str>>, V: Into<Cow<'a, str>>,

Specify an environment variable to read the filter from.

If the variable is not set, the default value will be used.

source

pub fn default_filter_or<V>(self, default: V) -> Selfwhere V: Into<Cow<'a, str>>,

Use the default environment variable to read the filter from.

If the variable is not set, the default value will be used.

source

pub fn write_style<E>(self, write_style_env: E) -> Selfwhere E: Into<Cow<'a, str>>,

Specify an environment variable to read the style from.

source

pub fn write_style_or<E, V>(self, write_style_env: E, default: V) -> Selfwhere E: Into<Cow<'a, str>>, V: Into<Cow<'a, str>>,

Specify an environment variable to read the style from.

If the variable is not set, the default value will be used.

source

pub fn default_write_style_or<V>(self, default: V) -> Selfwhere V: Into<Cow<'a, str>>,

Use the default environment variable to read the style from.

If the variable is not set, the default value will be used.

Trait Implementations§

source§

impl<'a> Debug for Env<'a>

source§

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

Formats the value using the given formatter. Read more
source§

impl<'a> Default for Env<'a>

source§

fn default() -> Self

Returns the “default value” for a type. Read more
source§

impl<'a, T> From<T> for Env<'a>where T: Into<Cow<'a, str>>,

source§

fn from(filter_env: T) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

§

impl<'a> RefUnwindSafe for Env<'a>

§

impl<'a> Send for Env<'a>

§

impl<'a> Sync for Env<'a>

§

impl<'a> Unpin for Env<'a>

§

impl<'a> UnwindSafe for Env<'a>

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

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

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.