Struct bones_framework::lib::prelude::OptionalQueryItem

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pub struct OptionalQueryItem<'a, T, S>(pub &'a S, pub PhantomData<&'a T>)
where
    T: HasSchema;
Expand description

Wrapper for the Comp SystemParam used as QueryItem to iterate over entities optionally retrieving components from ComponentStore. Entities iterated over will not be filtered by OptionalQueryItem.

See Optional helper func for constructing OptionalQueryItem and usage.

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§0: &'a S§1: PhantomData<&'a T>

Trait Implementations§

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impl<'a, T, S, C> QueryItem for &'a OptionalQueryItem<'a, T, S>
where T: HasSchema, C: ComponentIterBitset<'a, T> + 'a, S: Deref<Target = C> + 'a,

Immutably iterate over optional component with syntax: &Optional(&Comp<T>) / &Optional(&CompMut<T>). (For mutable optional iteration we require &mut OptionalMut(&mut CompMut<T>))

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type Iter = Map<UntypedComponentOptionalBitsetIterator<'a>, for<'b> fn(_: Option<SchemaRef<'b>>) -> Option<&'b T>>

The type of iterator this query item creates
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fn apply_bitset(&self, _bitset: &mut BitSetVec)

Modify the iteration bitset
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fn get_single_with_bitset( self, bitset: Rc<BitSetVec>, ) -> Result<<<&'a OptionalQueryItem<'a, T, S> as QueryItem>::Iter as Iterator>::Item, QuerySingleError>

Return the item that matches the query within the given bitset if there is exactly one entity that matches this query item.
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fn iter_with_bitset( self, bitset: Rc<BitSetVec>, ) -> <&'a OptionalQueryItem<'a, T, S> as QueryItem>::Iter

Return an iterator over the provided bitset.

Auto Trait Implementations§

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impl<'a, T, S> Freeze for OptionalQueryItem<'a, T, S>

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impl<'a, T, S> RefUnwindSafe for OptionalQueryItem<'a, T, S>
where S: RefUnwindSafe, T: RefUnwindSafe,

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impl<'a, T, S> Send for OptionalQueryItem<'a, T, S>
where S: Sync,

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impl<'a, T, S> Sync for OptionalQueryItem<'a, T, S>
where S: Sync,

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impl<'a, T, S> Unpin for OptionalQueryItem<'a, T, S>

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impl<'a, T, S> UnwindSafe for OptionalQueryItem<'a, T, S>
where S: RefUnwindSafe, T: RefUnwindSafe,

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

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fn raw_drop_cb() -> Unsafe<&'static (dyn Fn(*mut c_void) + Send + Sync)>

Get a callback suitable for [SchemaData].
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