Trait MaybePayload

pub trait MaybePayload<M, Variables>: UnstableSealed
where
    M: DynamicDataMarker,
{
    // Required methods
    fn new_empty() -> Self;
    fn load_put<P>(
        &mut self,
        provider: &P,
        req: DataRequest<'_>,
        variables: Variables,
    ) -> Result<Result<DataResponseMetadata, DataError>, MaybePayloadError>
       where P: BoundDataProvider<M> + ?Sized,
             Self: Sized;
    fn get(&self) -> DataPayloadWithVariablesBorrowed<'_, M, Variables>;
}

A type that may or may not be a DataPayload and may or may not contain a value depending on the type parameter Variables.

Helper trait for DateTimeNamesMarker.

🚧 This trait is considered unstable; it may change at any time, in breaking or non-breaking ways, including in SemVer minor releases. Do not implement this trait in userland unless you are prepared for things to occasionally break.

Required Methods

fn new_empty() -> Self

fn load_put<P>( &mut self, provider: &P, req: DataRequest<'_>, variables: Variables, ) -> Result<Result<DataResponseMetadata, DataError>, MaybePayloadError>

where P: BoundDataProvider<M> + ?Sized, Self: Sized,

fn get(&self) -> DataPayloadWithVariablesBorrowed<'_, M, Variables>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<M, Variables> MaybePayload<M, Variables> for ()

where M: DynamicDataMarker,

fn new_empty()

fn load_put<P>( &mut self, _: &P, _: DataRequest<'_>, _: Variables, ) -> Result<Result<DataResponseMetadata, DataError>, MaybePayloadError>

where P: BoundDataProvider<M> + ?Sized, (): Sized,

fn get(&self) -> DataPayloadWithVariablesBorrowed<'_, M, Variables>

Implementors

impl<M, Variables> MaybePayload<M, Variables> for DataPayloadWithVariables<M, Variables>

where M: DynamicDataMarker, Variables: PartialEq + Copy + MaybeAsErrorField,