Struct AnyOf

pub struct AnyOf<T>(/* private fields */);

The AnyOf query parameter fetches entities with any of the component types included in T.

Query<AnyOf<(&A, &B, &mut C)>> is equivalent to Query<(Option<&A>, Option<&B>, Option<&mut C>), Or<(With<A>, With<B>, With<C>)>>. Each of the components in T is returned as an Option, as with Option<A> queries. Entities are guaranteed to have at least one of the components in T.

Trait Implementations

impl QueryData for AnyOf<()>

type ReadOnly = AnyOf<()>

The read-only variant of this QueryData, which satisfies the ReadOnlyQueryData trait.

impl<F: QueryData> QueryData for AnyOf<(F₁, F₂, …, Fₙ)>

This trait is implemented for tuples up to 16 items long.

type ReadOnly = AnyOf<(<F as QueryData>::ReadOnly,)>

The read-only variant of this QueryData, which satisfies the ReadOnlyQueryData trait.

impl WorldQuery for AnyOf<()>

SAFETY: fetch accesses are a subset of the subqueries’ accesses This is sound because update_component_access and update_archetype_component_access adds accesses according to the implementations of all the subqueries. update_component_access replaces the filters with a disjunction where every element is a conjunction of the previous filters and the filters of one of the subqueries. This is sound because matches_component_set returns a disjunction of the results of the subqueries’ implementations.

const IS_DENSE: bool = true

Returns true if (and only if) every table of every archetype matched by this fetch contains all of the matched components. This is used to select a more efficient “table iterator” for “dense” queries. If this returns true, WorldQuery::set_table must be used before WorldQuery::fetch can be called for iterators. If this returns false, WorldQuery::set_archetype must be used before WorldQuery::fetch can be called for iterators.

type Fetch<'w> = ()

Per archetype/table state used by this WorldQuery to fetch Self::Item

type Item<'w> = ()

The item returned by this WorldQuery For QueryData this will be the item returned by the query. For QueryFilter this will be either (), or a bool indicating whether the entity should be included or a tuple of such things.

type State = ()

State used to construct a Self::Fetch. This will be cached inside QueryState, so it is best to move as much data / computation here as possible to reduce the cost of constructing Self::Fetch.

fn shrink<'wlong: 'wshort, 'wshort>( item: Self::Item<'wlong>, ) -> Self::Item<'wshort>

This function manually implements subtyping for the query items.

fn shrink_fetch<'wlong: 'wshort, 'wshort>( fetch: Self::Fetch<'wlong>, ) -> Self::Fetch<'wshort>

This function manually implements subtyping for the query fetches.

unsafe fn init_fetch<'w>( _world: UnsafeWorldCell<'w>, state: &Self::State, _last_run: Tick, _this_run: Tick, ) -> Self::Fetch<'w>

Creates a new instance of this fetch.

unsafe fn set_archetype<'w>( _fetch: &mut Self::Fetch<'w>, _state: &Self::State, _archetype: &'w Archetype, _table: &'w Table, )

Adjusts internal state to account for the next Archetype. This will always be called on archetypes that match this WorldQuery.

unsafe fn set_table<'w>( _fetch: &mut Self::Fetch<'w>, _state: &Self::State, _table: &'w Table, )

Adjusts internal state to account for the next Table. This will always be called on tables that match this WorldQuery.

unsafe fn fetch<'w>( _fetch: &mut Self::Fetch<'w>, _entity: Entity, _table_row: TableRow, ) -> Self::Item<'w>

Fetch Self::Item for either the given entity in the current Table, or for the given entity in the current Archetype. This must always be called after WorldQuery::set_table with a table_row in the range of the current Table or after WorldQuery::set_archetype with a entity in the current archetype.

fn update_component_access( state: &Self::State, access: &mut FilteredAccess<ComponentId>, )

Adds any component accesses used by this WorldQuery to access.

fn init_state(world: &mut World) -> Self::State

Creates and initializes a State for this WorldQuery type.

fn get_state(components: &Components) -> Option<Self::State>

Attempts to initialize a State for this WorldQuery type using read-only access to Components.

fn matches_component_set( _state: &Self::State, _set_contains_id: &impl Fn(ComponentId) -> bool, ) -> bool

Returns true if this query matches a set of components. Otherwise, returns false.

fn set_access(_state: &mut Self::State, _access: &FilteredAccess<ComponentId>)

Sets available accesses for implementors with dynamic access such as FilteredEntityRef or FilteredEntityMut.

impl<F: WorldQuery> WorldQuery for AnyOf<(F₁, F₂, …, Fₙ)>

This trait is implemented for tuples up to 16 items long. SAFETY: fetch accesses are a subset of the subqueries’ accesses This is sound because update_component_access and update_archetype_component_access adds accesses according to the implementations of all the subqueries. update_component_access replaces the filters with a disjunction where every element is a conjunction of the previous filters and the filters of one of the subqueries. This is sound because matches_component_set returns a disjunction of the results of the subqueries’ implementations.

const IS_DENSE: bool = _

Returns true if (and only if) every table of every archetype matched by this fetch contains all of the matched components. This is used to select a more efficient “table iterator” for “dense” queries. If this returns true, WorldQuery::set_table must be used before WorldQuery::fetch can be called for iterators. If this returns false, WorldQuery::set_archetype must be used before WorldQuery::fetch can be called for iterators.

type Fetch<'w> = ((<F as WorldQuery>::Fetch<'w>, bool),)

Per archetype/table state used by this WorldQuery to fetch Self::Item

type Item<'w> = (Option<<F as WorldQuery>::Item<'w>>,)

The item returned by this WorldQuery For QueryData this will be the item returned by the query. For QueryFilter this will be either (), or a bool indicating whether the entity should be included or a tuple of such things.

type State = (<F as WorldQuery>::State,)

State used to construct a Self::Fetch. This will be cached inside QueryState, so it is best to move as much data / computation here as possible to reduce the cost of constructing Self::Fetch.

fn shrink<'wlong: 'wshort, 'wshort>( item: Self::Item<'wlong>, ) -> Self::Item<'wshort>

This function manually implements subtyping for the query items.

fn shrink_fetch<'wlong: 'wshort, 'wshort>( fetch: Self::Fetch<'wlong>, ) -> Self::Fetch<'wshort>

This function manually implements subtyping for the query fetches.

unsafe fn init_fetch<'w>( _world: UnsafeWorldCell<'w>, state: &Self::State, _last_run: Tick, _this_run: Tick, ) -> Self::Fetch<'w>

Creates a new instance of this fetch.

unsafe fn set_archetype<'w>( _fetch: &mut Self::Fetch<'w>, _state: &Self::State, _archetype: &'w Archetype, _table: &'w Table, )

Adjusts internal state to account for the next Archetype. This will always be called on archetypes that match this WorldQuery.

unsafe fn set_table<'w>( _fetch: &mut Self::Fetch<'w>, _state: &Self::State, _table: &'w Table, )

Adjusts internal state to account for the next Table. This will always be called on tables that match this WorldQuery.

unsafe fn fetch<'w>( _fetch: &mut Self::Fetch<'w>, _entity: Entity, _table_row: TableRow, ) -> Self::Item<'w>

Fetch Self::Item for either the given entity in the current Table, or for the given entity in the current Archetype. This must always be called after WorldQuery::set_table with a table_row in the range of the current Table or after WorldQuery::set_archetype with a entity in the current archetype.

fn update_component_access( state: &Self::State, access: &mut FilteredAccess<ComponentId>, )

Adds any component accesses used by this WorldQuery to access.

fn init_state(world: &mut World) -> Self::State

Creates and initializes a State for this WorldQuery type.

fn get_state(components: &Components) -> Option<Self::State>

Attempts to initialize a State for this WorldQuery type using read-only access to Components.

fn matches_component_set( _state: &Self::State, _set_contains_id: &impl Fn(ComponentId) -> bool, ) -> bool

Returns true if this query matches a set of components. Otherwise, returns false.

fn set_access(_state: &mut Self::State, _access: &FilteredAccess<ComponentId>)

Sets available accesses for implementors with dynamic access such as FilteredEntityRef or FilteredEntityMut.

impl ReadOnlyQueryData for AnyOf<()>

SAFETY: each item in the tuple is read only

impl<F: ReadOnlyQueryData> ReadOnlyQueryData for AnyOf<(F₁, F₂, …, Fₙ)>

This trait is implemented for tuples up to 16 items long. SAFETY: each item in the tuple is read only