Struct NeverMarker 

pub struct NeverMarker<Y>(/* private fields */);

A DynamicDataMarker that never returns data.

All types that have non-blanket impls of DataProvider<M> are expected to explicitly implement DataProvider<NeverMarker<Y>>, returning DataErrorKind::MarkerNotFound. See impl_data_provider_never_marker!.

Examples

use icu_locale_core::langid;
use icu_provider::hello_world::*;
use icu_provider::marker::NeverMarker;
use icu_provider::prelude::*;

let buffer_provider = HelloWorldProvider.into_json_provider();

let result = DataProvider::<NeverMarker<HelloWorld<'static>>>::load(
    &buffer_provider.as_deserializing(),
    DataRequest {
        id: DataIdentifierBorrowed::for_locale(&langid!("en").into()),
        ..Default::default()
    },
);

assert!(matches!(
    result,
    Err(DataError {
        kind: DataErrorKind::MarkerNotFound,
        ..
    })
));

Trait Implementations

impl<Y: Clone> Clone for NeverMarker<Y>

fn clone(&self) -> NeverMarker<Y>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Y> DataMarker for NeverMarker<Y>

where for<'a> Y: Yokeable<'a>,

const INFO: DataMarkerInfo

The single DataMarkerInfo associated with this marker.

impl<Y: Debug> Debug for NeverMarker<Y>

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

Formats the value using the given formatter.

impl<Y> DynamicDataMarker for NeverMarker<Y>

where for<'a> Y: Yokeable<'a>,

type DataStruct = Y

A type that implements Yokeable. This should typically be the 'static version of a data struct.

impl<Y: Copy> Copy for NeverMarker<Y>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 0 bytes