Struct RowLookup 

pub struct RowLookup<'w, 's> { /* private fields */ }

The queries a kept row’s walk reads to line its entities up with its template.

Trait Implementations

impl SystemParam for RowLookup<'_, '_>

type State = FetchState

Used to store data which persists across invocations of a system.

type Item<'w, 's> = RowLookup<'w, 's>

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes.

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

Creates a new instance of this param’s State.

fn init_access( state: &Self::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any [World] access used by this [SystemParam].

fn apply(state: &mut Self::State, system_meta: &SystemMeta, world: &mut World)

Applies any deferred mutations stored in this [SystemParam]’s state. This is used to apply Commands during ApplyDeferred.

fn queue( state: &mut Self::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

Queues any deferred mutations to be applied at the next ApplyDeferred.

unsafe fn get_param<'w, 's>( state: &'s mut Self::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<Self::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'w, 's> ReadOnlySystemParam for RowLookup<'w, 's>

where Query<'w, 's, &'static Children>: ReadOnlySystemParam, Query<'w, 's, &'static LumenTag>: ReadOnlySystemParam,