Struct config::EnvironmentVariablesConfigurationProvider

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pub struct EnvironmentVariablesConfigurationProvider { /* private fields */ }
Available on crate feature env only.
Expand description

Represents a ConfigurationProvider for environment variables.

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impl EnvironmentVariablesConfigurationProvider

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pub fn new(prefix: String) -> Self

Initializes a new environment variables configuration provider.

Arguments
  • prefix - A prefix used to filter the environment variables

Trait Implementations§

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impl ConfigurationProvider for EnvironmentVariablesConfigurationProvider

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fn get(&self, key: &str) -> Option<Value>

Attempts to get a configuration value with the specified key. Read more
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fn load(&mut self) -> LoadResult

Loads the configuration values from the implemented source.
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fn child_keys(&self, earlier_keys: &mut Vec<String>, parent_path: Option<&str>)

Gets the immediate descendent configuration keys for a given parent path based on this ConfigurationProvider and the set of keys returned by all of the preceding ConfigurationProvider. Read more
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fn name(&self) -> &str

Gets the name of the provider.
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fn reload_token(&self) -> Box<dyn ChangeToken>

Returns a ChangeToken if this provider supports change tracking.
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impl Default for EnvironmentVariablesConfigurationProvider

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fn default() -> EnvironmentVariablesConfigurationProvider

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

Auto Trait Implementations§

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,

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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,

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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

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fn from(t: T) -> T

Returns the argument unchanged.

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.