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Query

Struct Query 

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pub struct Query<'a, Q: Query> { /* private fields */ }

Methods from Deref<Target = QueryBorrow<'a, Q>>§

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pub fn iter(&mut self) -> QueryIter<'_, Q>

Execute the query

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pub fn view(&mut self) -> View<'_, Q>

Provide random access to the query results

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pub fn iter_batched(&mut self, batch_size: u32) -> BatchedIter<'_, Q>

Like iter, but returns child iterators of at most batch_size elements

Useful for distributing work over a threadpool.

Trait Implementations§

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impl<'a, Q: Query> Deref for Query<'a, Q>

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type Target = QueryBorrow<'a, Q>

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<'a, Q: Query> DerefMut for Query<'a, Q>

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fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

Auto Trait Implementations§

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impl<'a, Q> Freeze for Query<'a, Q>

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impl<'a, Q> RefUnwindSafe for Query<'a, Q>
where <<Q as Query>::Fetch as Fetch>::State: RefUnwindSafe,

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impl<'a, Q> Send for Query<'a, Q>
where <Q as Query>::Item<'a>: for<'a> Send,

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impl<'a, Q> Sync for Query<'a, Q>
where <Q as Query>::Item<'a>: for<'a> Send,

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impl<'a, Q> Unpin for Query<'a, Q>

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impl<'a, Q> UnsafeUnpin for Query<'a, Q>

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impl<'a, Q> UnwindSafe for Query<'a, Q>
where <<Q as Query>::Fetch as Fetch>::State: RefUnwindSafe,

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> Component for T
where T: Send + Sync + 'static,

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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<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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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