Struct icu_provider_adapters::empty::EmptyDataProvider

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pub struct EmptyDataProvider {
    error_kind: DataErrorKind,
}
Expand description

A data provider that always returns an error.

The returned error kind is configurable.

§Examples

use icu_provider::hello_world::HelloWorldV1Marker;
use icu_provider::prelude::*;
use icu_provider_adapters::empty::EmptyDataProvider;

let provider = EmptyDataProvider::new();

assert!(matches!(
    provider.load_any(HelloWorldV1Marker::KEY, Default::default()),
    Err(DataError {
        kind: DataErrorKind::MissingDataKey,
        ..
    })
));

Fields§

§error_kind: DataErrorKind

Implementations§

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impl EmptyDataProvider

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pub fn new() -> Self

Creates a data provider that always returns DataErrorKind::MissingDataKey.

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pub fn new_with_error_kind(error_kind: DataErrorKind) -> Self

Creates a data provider that always returns the specified error kind.

Trait Implementations§

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impl AnyProvider for EmptyDataProvider

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fn load_any( &self, key: DataKey, base_req: DataRequest<'_>, ) -> Result<AnyResponse, DataError>

Loads an AnyPayload according to the key and request.
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impl BufferProvider for EmptyDataProvider

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fn load_buffer( &self, key: DataKey, base_req: DataRequest<'_>, ) -> Result<DataResponse<BufferMarker>, DataError>

Loads a DataPayload<BufferMarker> according to the key and request.
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impl<M> DataProvider<M> for EmptyDataProvider
where M: KeyedDataMarker,

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fn load(&self, base_req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>

Query the provider for data, returning the result. Read more
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impl Debug for EmptyDataProvider

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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 Default for EmptyDataProvider

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<M> DynamicDataProvider<M> for EmptyDataProvider
where M: DataMarker,

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fn load_data( &self, key: DataKey, base_req: DataRequest<'_>, ) -> Result<DataResponse<M>, DataError>

Query the provider for data, returning the result. 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<P> AsDowncastingAnyProvider for P
where P: AnyProvider + ?Sized,

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fn as_downcasting(&self) -> DowncastingAnyProvider<'_, P>

Returns an object implementing DynamicDataProvider<M> when called on AnyProvider
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impl<P> AsDynamicDataProviderAnyMarkerWrap for P

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fn as_any_provider(&self) -> DynamicDataProviderAnyMarkerWrap<'_, P>

Returns an object implementing AnyProvider when called on DynamicDataProvider<AnyMarker>
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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> Filterable for T

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. 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.
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T