pub enum CoroutineState<Y, R> {
    Yielded(Y),
    Complete(R),
}
🔬This is a nightly-only experimental API. (coroutine_trait #43122)
Expand description

The result of a coroutine resumption.

This enum is returned from the Coroutine::resume method and indicates the possible return values of a coroutine. Currently this corresponds to either a suspension point (Yielded) or a termination point (Complete).

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Yielded(Y)

🔬This is a nightly-only experimental API. (coroutine_trait #43122)

The coroutine suspended with a value.

This state indicates that a coroutine has been suspended, and typically corresponds to a yield statement. The value provided in this variant corresponds to the expression passed to yield and allows coroutines to provide a value each time they yield.

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Complete(R)

🔬This is a nightly-only experimental API. (coroutine_trait #43122)

The coroutine completed with a return value.

This state indicates that a coroutine has finished execution with the provided value. Once a coroutine has returned Complete it is considered a programmer error to call resume again.

Trait Implementations§

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impl<Y, R> Clone for CoroutineState<Y, R>
where Y: Clone, R: Clone,

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fn clone(&self) -> CoroutineState<Y, R>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<Y, R> Debug for CoroutineState<Y, R>
where Y: Debug, R: Debug,

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl<Y, R> Hash for CoroutineState<Y, R>
where Y: Hash, R: Hash,

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fn hash<__H>(&self, state: &mut __H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<Y, R> Ord for CoroutineState<Y, R>
where Y: Ord, R: Ord,

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fn cmp(&self, other: &CoroutineState<Y, R>) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<Y, R> PartialEq for CoroutineState<Y, R>
where Y: PartialEq, R: PartialEq,

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fn eq(&self, other: &CoroutineState<Y, R>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<Y, R> PartialOrd for CoroutineState<Y, R>
where Y: PartialOrd, R: PartialOrd,

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fn partial_cmp(&self, other: &CoroutineState<Y, R>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<Y, R> Copy for CoroutineState<Y, R>
where Y: Copy, R: Copy,

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impl<Y, R> Eq for CoroutineState<Y, R>
where Y: Eq, R: Eq,

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impl<Y, R> StructuralPartialEq for CoroutineState<Y, R>

Auto Trait Implementations§

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impl<Y, R> Freeze for CoroutineState<Y, R>
where R: Freeze, Y: Freeze,

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impl<Y, R> RefUnwindSafe for CoroutineState<Y, R>

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impl<Y, R> Send for CoroutineState<Y, R>
where R: Send, Y: Send,

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impl<Y, R> Sync for CoroutineState<Y, R>
where R: Sync, Y: Sync,

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impl<Y, R> Unpin for CoroutineState<Y, R>
where R: Unpin, Y: Unpin,

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impl<Y, R> UnwindSafe for CoroutineState<Y, R>
where R: UnwindSafe, Y: UnwindSafe,

Blanket Implementations§

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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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impl<T, U> Into<U> for T
where U: From<T>,

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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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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

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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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more