Trait icu_provider::any::AnyProvider

pub trait AnyProvider {
    // Required method
    fn load_any(
        &self,
        marker: DataMarkerInfo,
        req: DataRequest<'_>,
    ) -> Result<AnyResponse, DataError>;
}

An object-safe data provider that returns data structs cast to dyn Any trait objects.

Examples

use icu_locale_core::langid;
use icu_provider::hello_world::*;
use icu_provider::prelude::*;
use std::borrow::Cow;

let any_provider = HelloWorldProvider.as_any_provider();

// Downcasting manually
assert_eq!(
    any_provider
        .load_any(
            HelloWorldV1Marker::INFO,
            DataRequest {
                id: DataIdentifierBorrowed::for_locale(
                    &langid!("de").into()
                ),
                ..Default::default()
            }
        )
        .expect("load should succeed")
        .downcast::<HelloWorldV1Marker>()
        .expect("types should match")
        .payload
        .get(),
    &HelloWorldV1 {
        message: Cow::Borrowed("Hallo Welt"),
    },
);

// Downcasting automatically
let downcasting_provider: &dyn DataProvider<HelloWorldV1Marker> =
    &any_provider.as_downcasting();

assert_eq!(
    downcasting_provider
        .load(DataRequest {
            id: DataIdentifierBorrowed::for_locale(&langid!("de").into()),
            ..Default::default()
        })
        .expect("load should succeed")
        .payload
        .get(),
    &HelloWorldV1 {
        message: Cow::Borrowed("Hallo Welt"),
    },
);

Required Methods

fn load_any( &self, marker: DataMarkerInfo, req: DataRequest<'_>, ) -> Result<AnyResponse, DataError>

Loads an AnyPayload according to the marker and request.

Implementations on Foreign Types

impl<T: AnyProvider + ?Sized> AnyProvider for &T

fn load_any( &self, marker: DataMarkerInfo, req: DataRequest<'_>, ) -> Result<AnyResponse, DataError>

impl<T: AnyProvider + ?Sized> AnyProvider for Box<T>

fn load_any( &self, marker: DataMarkerInfo, req: DataRequest<'_>, ) -> Result<AnyResponse, DataError>

impl<T: AnyProvider + ?Sized> AnyProvider for Rc<T>

fn load_any( &self, marker: DataMarkerInfo, req: DataRequest<'_>, ) -> Result<AnyResponse, DataError>

impl<T: AnyProvider + ?Sized> AnyProvider for Arc<T>

fn load_any( &self, marker: DataMarkerInfo, req: DataRequest<'_>, ) -> Result<AnyResponse, DataError>

Implementors

impl<P> AnyProvider for DynamicDataProviderAnyMarkerWrap<'_, P>

where P: DynamicDataProvider<AnyMarker> + ?Sized,