pub enum Either3<A, B, C> {
    First(A),
    Second(B),
    Third(C),
}
Expand description

select3的输出结果。
Result for select3.

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First(A)

第一个future先完成
First future finished first.

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Second(B)

第二个future先完成
Second future finished first.

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Third(C)

第三个future先完成
Third future finished first.

Trait Implementations§

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impl<A: Clone, B: Clone, C: Clone> Clone for Either3<A, B, C>

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fn clone(&self) -> Either3<A, B, C>

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<A: Debug, B: Debug, C: Debug> Debug for Either3<A, B, C>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<A, B, C> RefUnwindSafe for Either3<A, B, C>where A: RefUnwindSafe, B: RefUnwindSafe, C: RefUnwindSafe,

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impl<A, B, C> Send for Either3<A, B, C>where A: Send, B: Send, C: Send,

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impl<A, B, C> Sync for Either3<A, B, C>where A: Sync, B: Sync, C: Sync,

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impl<A, B, C> Unpin for Either3<A, B, C>where A: Unpin, B: Unpin, C: Unpin,

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impl<A, B, C> UnwindSafe for Either3<A, B, C>where A: UnwindSafe, B: UnwindSafe, C: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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, U> Into<U> for Twhere 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, U> TryFrom<U> for Twhere 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 Twhere 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.