Struct EmptyDataProvider

pub struct EmptyDataProvider { /* private fields */ }

A data provider that always returns an error.

The returned error kind is configurable.

Examples

use icu_provider::hello_world::HelloWorldV1;
use icu_provider::prelude::*;
use icu_provider_adapters::empty::EmptyDataProvider;

let provider = EmptyDataProvider::new();

assert!(matches!(
    DataProvider::<HelloWorldV1>::load(&provider, Default::default()),
    Err(DataError {
        kind: DataErrorKind::MarkerNotFound,
        ..
    })
));

Implementations

impl EmptyDataProvider

pub fn new() -> Self

Creates a data provider that always returns [DataErrorKind::MarkerNotFound].

pub fn new_with_error_kind(error_kind: DataErrorKind) -> Self

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

Trait Implementations

impl<M> DataProvider<M> for EmptyDataProvider

where M: DataMarker,

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

Query the provider for data, returning the result.

impl Debug for EmptyDataProvider

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

Formats the value using the given formatter.

impl Default for EmptyDataProvider

fn default() -> Self

Returns the “default value” for a type.

impl<M> DynamicDataProvider<M> for EmptyDataProvider

where M: DynamicDataMarker,

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

Query the provider for data, returning the result.

impl ExportableProvider for EmptyDataProvider

fn supported_markers(&self) -> BTreeSet<DataMarkerInfo>

Returns the set of supported markers

impl<M> IterableDataProvider<M> for EmptyDataProvider

where M: DataMarker,

fn iter_ids(&self) -> Result<BTreeSet<DataIdentifierCow<'_>>, DataError>

Returns a set of [DataIdentifierCow].

impl<M> IterableDynamicDataProvider<M> for EmptyDataProvider

where M: DynamicDataMarker,

fn iter_ids_for_marker( &self, _: DataMarkerInfo, ) -> Result<BTreeSet<DataIdentifierCow<'_>>, DataError>

Given a [DataMarkerInfo], returns a set of [DataIdentifierCow].