Struct ReadVcFuture 

pub struct ReadVcFuture<T, Cast = VcValueTypeCast<T>>
where
    T: ?Sized,
    Cast: VcCast,
{ /* private fields */ }

Implementations

impl<T, Cast> ReadVcFuture<T, Cast>

where T: ?Sized, Cast: VcCast,

pub fn strongly_consistent(self) -> Self

Do not use this: Use [OperationVc::read_strongly_consistent] instead.

pub fn untracked(self) -> Self

Returns a untracked read of the value. This will not invalidate the current function when the read value changed.

pub fn final_read_hint(self) -> Self

Read the value with the hint that this is the final read of the value. This might drop the cell content. Future reads might need to recompute the value.

impl<T> ReadVcFuture<T, VcValueTypeCast<T>>

where T: VcValueType, <<T as VcValueType>::Read as VcRead<T>>::Target: Clone,

pub fn owned(self) -> ReadOwnedVcFuture<T>

Read the value and returns a owned version of it. It might clone the value.

impl<T> ReadVcFuture<T, VcValueTypeCast<T>>

where T: VcValueType, <<T as VcValueType>::Read as VcRead<T>>::Target: Keyed, <<<T as VcValueType>::Read as VcRead<T>>::Target as Keyed>::Key: Hash,

pub fn get<'l>( self, key: &'l <<<T as VcValueType>::Read as VcRead<T>>::Target as Keyed>::Key, ) -> ReadKeyedVcFuture<'l, T>

Read the value and selects a keyed value from it. Only depends on the used key instead of the full value.

pub fn contains_key<'l>( self, key: &'l <<<T as VcValueType>::Read as VcRead<T>>::Target as Keyed>::Key, ) -> ReadContainsKeyedVcFuture<'l, T>

Read the value and checks if it contains the given key. Only depends on the used key instead of the full value.

Note: This is also invalidated when the value of the key changes, not only when the presence of the key changes.

Trait Implementations

impl<T> From<ReadRawVcFuture> for ReadVcFuture<T, VcValueTypeCast<T>>

where T: VcValueType,

fn from(raw: ReadRawVcFuture) -> Self

Converts to this type from the input type.

impl<T> From<ReadRawVcFuture> for ReadVcFuture<T, VcValueTraitCast<T>>

where T: VcValueTrait + ?Sized,

fn from(raw: ReadRawVcFuture) -> Self

Converts to this type from the input type.

impl<T, Cast> Future for ReadVcFuture<T, Cast>

where T: ?Sized, Cast: VcCast,

type Output = Result<<Cast as VcCast>::Output, Error>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.