Struct QueryLens

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pub struct QueryLens<'w, Q: QueryData, F: QueryFilter = ()> { /* private fields */ }

Expand description

Type returned from Query::transmute_lens containing the new QueryState.

Call query or into to construct the resulting Query

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impl<'w, Q: QueryData, F: QueryFilter> QueryLens<'w, Q, F>

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pub fn query(&mut self) -> Query<'_, '_, Q, F>

Create a Query from the underlying QueryState.

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impl<'w, Q: ReadOnlyQueryData, F: QueryFilter> QueryLens<'w, Q, F>

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pub fn query_inner(&self) -> Query<'w, '_, Q, F>

Create a Query from the underlying QueryState. This returns results with the actual “inner” world lifetime, so it may only be used with read-only queries to prevent mutable aliasing.

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impl<'w, 'q, Q: QueryData, F: QueryFilter> From<&'q mut Query<'w, '_, Q, F>> for QueryLens<'q, Q, F>

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fn from(value: &'q mut Query<'w, '_, Q, F>) -> QueryLens<'q, Q, F>

Converts to this type from the input type.

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impl<'w, 's, Q: QueryData, F: QueryFilter> From<&'s mut QueryLens<'w, Q, F>> for Query<'s, 's, Q, F>

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fn from(value: &'s mut QueryLens<'w, Q, F>) -> Query<'s, 's, Q, F>

Converts to this type from the input type.

Auto Trait Implementations§

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impl<'w, Q, F> Freeze for QueryLens<'w, Q, F>
where <Q as WorldQuery>::State: Freeze, <F as WorldQuery>::State: Freeze,

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impl<'w, Q, F> Unpin for QueryLens<'w, Q, F>
where <Q as WorldQuery>::State: Unpin, <F as WorldQuery>::State: Unpin,

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impl<'w, Q, F = ()> !UnwindSafe for QueryLens<'w, Q, F>

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> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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impl<T> DowncastSend for T
where T: Any + Send,

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fn into_any_send(self: Box<T>) -> Box<dyn Any + Send>

Converts Box<Trait> (where Trait: DowncastSend) to Box<dyn Any + Send>, which can then be downcast into Box<ConcreteType> where ConcreteType implements Trait.

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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_sync(self: Box<T>) -> Box<dyn Any + Sync + Send>

Converts Box<Trait> (where Trait: DowncastSync) to Box<dyn Any + Send + Sync>, which can then be downcast into Box<ConcreteType> where ConcreteType implements Trait.

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Converts Arc<Trait> (where Trait: DowncastSync) to Arc<Any>, which can then be downcast into Arc<ConcreteType> where ConcreteType implements Trait.

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