pub struct DebugName {
    pub name: Option<&'static Name>,
    pub entity: Entity,
}
Expand description

Convenient query for giving a human friendly name to an entity.

fn increment_score(mut scores: Query<(DebugName, &mut Score)>) {
    for (name, mut score) in &mut scores {
        score.0 += 1.0;
        if score.0.is_nan() {
            bevy_utils::tracing::error!("Score for {:?} is invalid", name);
        }
    }
}

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§name: Option<&'static Name>

A Name that the entity might have that is displayed if available.

§entity: Entity

The unique identifier of the entity as a fallback.

Trait Implementations§

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impl QueryData for DebugName

SAFETY: we assert fields are readonly below

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type ReadOnly = DebugName

The read-only variant of this QueryData, which satisfies the ReadOnlyQueryData trait.
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impl WorldQuery for DebugName

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unsafe fn set_archetype<'__w>( _fetch: &mut <DebugName as WorldQuery>::Fetch<'__w>, _state: &<DebugName as WorldQuery>::State, _archetype: &'__w Archetype, _table: &'__w Table )

SAFETY: we call set_archetype for each member that implements Fetch

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unsafe fn set_table<'__w>( _fetch: &mut <DebugName as WorldQuery>::Fetch<'__w>, _state: &<DebugName as WorldQuery>::State, _table: &'__w Table )

SAFETY: we call set_table for each member that implements Fetch

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unsafe fn fetch<'__w>( _fetch: &mut <DebugName as WorldQuery>::Fetch<'__w>, _entity: Entity, _table_row: TableRow ) -> <DebugName as WorldQuery>::Item<'__w>

SAFETY: we call fetch for each member that implements Fetch.

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type Item<'__w> = DebugNameItem<'__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.
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type Fetch<'__w> = DebugNameFetch<'__w>

Per archetype/table state used by this WorldQuery to fetch Self::Item
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type State = DebugNameState

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.
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fn shrink<'__wlong, '__wshort>( item: <DebugName as WorldQuery>::Item<'__wlong> ) -> <DebugName as WorldQuery>::Item<'__wshort>
where '__wlong: '__wshort,

This function manually implements subtyping for the query items.
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unsafe fn init_fetch<'__w>( _world: UnsafeWorldCell<'__w>, state: &<DebugName as WorldQuery>::State, _last_run: Tick, _this_run: Tick ) -> <DebugName as WorldQuery>::Fetch<'__w>

Creates a new instance of this fetch. Read more
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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.
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fn update_component_access( state: &<DebugName as WorldQuery>::State, _access: &mut FilteredAccess<ComponentId> )

Adds any component accesses used by this WorldQuery to access.
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fn init_state(world: &mut World) -> DebugNameState

Creates and initializes a State for this WorldQuery type.
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fn get_state(world: &World) -> Option<DebugNameState>

Attempts to initializes a State for this WorldQuery type.
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fn matches_component_set( state: &<DebugName as WorldQuery>::State, _set_contains_id: &impl Fn(ComponentId) -> bool ) -> bool

Returns true if this query matches a set of components. Otherwise, returns false.
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fn set_access(_state: &mut Self::State, _access: &FilteredAccess<ComponentId>)

Sets available accesses for implementors with dynamic access such as FilteredEntityRef or FilteredEntityMut. Read more
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impl ReadOnlyQueryData for DebugName

SAFETY: we assert fields are readonly below

Auto Trait 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>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &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)

Convert &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> DowncastSync for T
where T: Any + Send + Sync,

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

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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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<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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