Struct justconfig::sources::env::Env

source · [−]

pub struct Env { /* private fields */ }

Expand description

Implements the environment source.

Implementations

impl Env

pub fn new(env_mapping: &[(ConfPath, &OsStr )]) -> Box<Self>

Creates a new environment source.

For creating the environment source a mapping between the configuration key and the name of the environment variable has to be created. This is done by passing a slice of tuples. The first element of the tuple defines the configuration path of the environment value and the second element defines the name of the environment variable.

See the env module for more information.

Trait Implementations

impl Source for Env

fn get(&self, key: ConfPath) -> Option<StringItem>

Get a configuration option. Read more

Auto Trait Implementations

impl !RefUnwindSafe for Env

impl !Send for Env

impl !Sync for Env

impl Unpin for Env

impl !UnwindSafe for Env

Blanket Implementations

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> 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.

impl<T, U> TryFrom<U> 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<U>>::Error>

Performs the conversion.

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.

const: unstable · source

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

Performs the conversion.