pub trait DynamicDataMarker: 'static {
type DataStruct: for<'a> Yokeable<'a>;
}Expand description
Trait marker for data structs. All types delivered by the data provider must be associated with something implementing this trait.
Data markers normally generated with the data_marker macro.
Also see DataMarker.
Note: DynamicDataMarkers are quasi-const-generic compile-time objects, and as such are expected
to be unit structs. As this is not something that can be enforced by the type system, we
currently only have a 'static bound on them (which is needed by a lot of our code).
§Examples
Manually implementing DynamicDataMarker for a custom type:
use icu_provider::prelude::*;
use std::borrow::Cow;
#[derive(yoke::Yokeable, zerofrom::ZeroFrom)]
struct MyDataStruct<'data> {
message: Cow<'data, str>,
}
struct MyDataStructMarker;
impl DynamicDataMarker for MyDataStructMarker {
type DataStruct = MyDataStruct<'static>;
}
// We can now use MyDataStruct with DataProvider:
let s = MyDataStruct {
message: Cow::Owned("Hello World".into()),
};
let payload = DataPayload::<MyDataStructMarker>::from_owned(s);
assert_eq!(payload.get().message, "Hello World");Required Associated Types§
Sourcetype DataStruct: for<'a> Yokeable<'a>
type DataStruct: for<'a> Yokeable<'a>
A type that implements Yokeable. This should typically be the 'static version of a
data struct.