Struct Backends 

pub struct Backends<B: BackendEntry> { /* private fields */ }

Main-world registry of the backends of one kind this binary carries.

Implementations

impl<B: BackendEntry> Backends<B>

pub fn register(&mut self, backend: B)

Add backend, replacing one registered under the same name.

pub fn get(&self, name: &str) -> Option<&B>

The backend registered as name.

pub fn by_priority(&self) -> Vec<B>

Every backend, highest priority first; equal priorities in name order, so the order is the same in every process.

pub fn preferred(&self) -> Option<B>

The highest-priority backend, for a kind a launch uses exactly one of and no configuration names.

pub fn names(&self) -> Vec<&'static str>

The registered names, sorted, for a message naming what is available.

pub fn select(&self, choice: Option<&str>) -> Result<Vec<B>, String>

The backends a launch should try, in order: the one choice names, or every backend by priority when choice is None. An error names what was asked for and what this binary carries.

Trait Implementations

impl<B: Clone + BackendEntry> Clone for Backends<B>

fn clone(&self) -> Backends<B>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<B: BackendEntry> Component for Backends<B>

where Self: Send + Sync + 'static,

const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::SparseSet

A constant indicating the storage type used for this component.

type Mutability = Mutable

A marker type to assist Bevy with determining if this component is mutable, or immutable. Mutable components will have Component<Mutability = Mutable>, while immutable components will instead have Component<Mutability = Immutable>.

fn register_required_components( _requiree: ComponentId, required_components: &mut RequiredComponentsRegistrator<'_, '_>, )

Registers required components.

fn clone_behavior() -> ComponentCloneBehavior

Called when registering this component, allowing to override clone function (or disable cloning altogether) for this component.

fn relationship_accessor() -> Option<ComponentRelationshipAccessor<Self>>

Returns [ComponentRelationshipAccessor] required for working with relationships in dynamic contexts.

fn on_add() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_add [ComponentHook] for this Component if one is defined.

fn on_insert() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_insert [ComponentHook] for this Component if one is defined.

fn on_discard() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_discard [ComponentHook] for this Component if one is defined.

fn on_remove() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_remove [ComponentHook] for this Component if one is defined.

fn on_despawn() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_despawn [ComponentHook] for this Component if one is defined.

fn map_entities<E>(_this: &mut Self, _mapper: &mut E)

where E: EntityMapper,

Maps the entities on this component using the given EntityMapper. This is used to remap entities in contexts like scenes and entity cloning. When deriving Component, this is populated by annotating fields containing entities with #[entities]

impl<B: Debug + BackendEntry> Debug for Backends<B>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<B: BackendEntry> Default for Backends<B>

fn default() -> Self

Returns the “default value” for a type.

impl<B: BackendEntry> Resource for Backends<B>

where Self: Send + Sync + 'static,