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InitNone

hydro_lang::live_collections::optional

Enum InitNone 

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pub enum InitNone {}
Expand description

Marks that the Optional is null only initially: once it becomes non-null it will remain non-null forever, although the non-null value may still change arbitrarily over time.

This erases to Unbounded, since the value (when present) is still asynchronously changing.

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impl IsInitNone for InitNone

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impl OptionalBound for InitNone

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type UnderlyingBound = Unbounded

The Boundedness that this Optional would be erased to.
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fn bound_kind() -> OptionalBoundKind

Returns the OptionalBoundKind corresponding to this type.

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<Unshared, Shared> IntoShared<Shared> for Unshared
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fn into_shared(self) -> Shared

Creates a shared type from an unshared type.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToSinkBuild for T

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fn iter_to_sink_build(self) -> SendIterBuild<Self>
where Self: Sized + Iterator,

Starts a SinkBuild adaptor chain to send all items from self as an Iterator.
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fn stream_to_sink_build(self) -> SendStreamBuild<Self>
where Self: Sized + Stream,

Starts a SinkBuild adaptor chain to send all items from self as a [Stream].
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impl<T, U> TryFrom<U> for T
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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
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Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more