Struct env_logger::Env

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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

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impl<'a> Env<'a>

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pub fn new() -> Self

Get a default set of environment variables.

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

Specify an environment variable to read the filter from.

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pub fn filter_or<E, V>(self, filter_env: E, default: V) -> Self where
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.

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pub fn default_filter_or<V>(self, default: V) -> Self where
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.

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

Specify an environment variable to read the style from.

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pub fn write_style_or<E, V>(self, write_style_env: E, default: V) -> Self where
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.

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pub fn default_write_style_or<V>(self, default: V) -> Self where
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

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

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

Formats the value using the given formatter. Read more

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

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fn default() -> Self

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

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

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fn from(filter_env: T) -> Self

Performs the conversion.

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

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · 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.

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Struct env_logger::Env

Default environment variables

Implementations

impl<'a> Env<'a>

pub fn new() -> Self

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

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

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

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

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

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

Trait Implementations

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

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

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

fn default() -> Self

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

fn from(filter_env: T) -> Self

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

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Error = Infallible

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

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

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

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

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

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

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

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

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

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

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

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

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

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