pub struct Components { /* private fields */ }
Implementations§
Source§impl Components
impl Components
Sourcepub fn len(&self) -> usize
pub fn len(&self) -> usize
Returns the number of components registered or queued with this instance.
Sourcepub fn is_empty(&self) -> bool
pub fn is_empty(&self) -> bool
Returns true
if there are no components registered or queued with this instance. Otherwise, this returns false
.
Sourcepub fn num_queued(&self) -> usize
pub fn num_queued(&self) -> usize
Returns the number of components registered with this instance.
Sourcepub fn any_queued(&self) -> bool
pub fn any_queued(&self) -> bool
Returns true
if there are any components registered with this instance. Otherwise, this returns false
.
Sourcepub fn num_queued_mut(&mut self) -> usize
pub fn num_queued_mut(&mut self) -> usize
A faster version of Self::num_queued
.
Sourcepub fn any_queued_mut(&mut self) -> bool
pub fn any_queued_mut(&mut self) -> bool
A faster version of Self::any_queued
.
Sourcepub fn num_registered(&self) -> usize
pub fn num_registered(&self) -> usize
Returns the number of components registered with this instance.
Sourcepub fn any_registered(&self) -> bool
pub fn any_registered(&self) -> bool
Returns true
if there are any components registered with this instance. Otherwise, this returns false
.
Sourcepub fn get_info(&self, id: ComponentId) -> Option<&ComponentInfo>
pub fn get_info(&self, id: ComponentId) -> Option<&ComponentInfo>
Gets the metadata associated with the given component, if it is registered.
This will return None
if the id is not regiserted or is queued.
This will return an incorrect result if id
did not come from the same world as self
. It may return None
or a garbage value.
Sourcepub fn get_descriptor<'a>(
&'a self,
id: ComponentId,
) -> Option<Cow<'a, ComponentDescriptor>>
pub fn get_descriptor<'a>( &'a self, id: ComponentId, ) -> Option<Cow<'a, ComponentDescriptor>>
Gets the ComponentDescriptor
of the component with this ComponentId
if it is present.
This will return None
only if the id is neither regisered nor queued to be registered.
Currently, the Cow
will be Cow::Owned
if and only if the component is queued. It will be Cow::Borrowed
otherwise.
This will return an incorrect result if id
did not come from the same world as self
. It may return None
or a garbage value.
Sourcepub fn get_name<'a>(&'a self, id: ComponentId) -> Option<Cow<'a, str>>
pub fn get_name<'a>(&'a self, id: ComponentId) -> Option<Cow<'a, str>>
Gets the name of the component with this ComponentId
if it is present.
This will return None
only if the id is neither regisered nor queued to be registered.
This will return an incorrect result if id
did not come from the same world as self
. It may return None
or a garbage value.
Sourcepub unsafe fn get_info_unchecked(&self, id: ComponentId) -> &ComponentInfo
pub unsafe fn get_info_unchecked(&self, id: ComponentId) -> &ComponentInfo
Gets the metadata associated with the given component.
§Safety
id
must be a valid and fully registered ComponentId
.
Sourcepub fn is_id_valid(&self, id: ComponentId) -> bool
pub fn is_id_valid(&self, id: ComponentId) -> bool
Returns true if the ComponentId
is fully registered and valid.
Ids may be invalid if they are still queued to be registered.
Those ids are still correct, but they are not usable in every context yet.
Sourcepub fn get_valid_id(&self, type_id: TypeId) -> Option<ComponentId>
pub fn get_valid_id(&self, type_id: TypeId) -> Option<ComponentId>
Type-erased equivalent of Components::valid_component_id()
.
Sourcepub fn valid_component_id<T: Component>(&self) -> Option<ComponentId>
pub fn valid_component_id<T: Component>(&self) -> Option<ComponentId>
Returns the ComponentId
of the given Component
type T
if it is fully registered.
If you want to include queued registration, see Components::component_id()
.
use bevy_ecs::prelude::*;
let mut world = World::new();
#[derive(Component)]
struct ComponentA;
let component_a_id = world.register_component::<ComponentA>();
assert_eq!(component_a_id, world.components().valid_component_id::<ComponentA>().unwrap())
§See also
Sourcepub fn get_valid_resource_id(&self, type_id: TypeId) -> Option<ComponentId>
pub fn get_valid_resource_id(&self, type_id: TypeId) -> Option<ComponentId>
Type-erased equivalent of Components::valid_resource_id()
.
Sourcepub fn valid_resource_id<T: Resource>(&self) -> Option<ComponentId>
pub fn valid_resource_id<T: Resource>(&self) -> Option<ComponentId>
Returns the ComponentId
of the given Resource
type T
if it is fully registered.
If you want to include queued registration, see Components::resource_id()
.
use bevy_ecs::prelude::*;
let mut world = World::new();
#[derive(Resource, Default)]
struct ResourceA;
let resource_a_id = world.init_resource::<ResourceA>();
assert_eq!(resource_a_id, world.components().valid_resource_id::<ResourceA>().unwrap())
§See also
Sourcepub fn get_id(&self, type_id: TypeId) -> Option<ComponentId>
pub fn get_id(&self, type_id: TypeId) -> Option<ComponentId>
Type-erased equivalent of Components::component_id()
.
Sourcepub fn component_id<T: Component>(&self) -> Option<ComponentId>
pub fn component_id<T: Component>(&self) -> Option<ComponentId>
Returns the ComponentId
of the given Component
type T
.
The returned ComponentId
is specific to the Components
instance
it was retrieved from and should not be used with another Components
instance.
Returns None
if the Component
type has not
yet been initialized using ComponentsRegistrator::register_component()
or ComponentsQueuedRegistrator::queue_register_component()
.
use bevy_ecs::prelude::*;
let mut world = World::new();
#[derive(Component)]
struct ComponentA;
let component_a_id = world.register_component::<ComponentA>();
assert_eq!(component_a_id, world.components().component_id::<ComponentA>().unwrap())
§See also
Sourcepub fn get_resource_id(&self, type_id: TypeId) -> Option<ComponentId>
pub fn get_resource_id(&self, type_id: TypeId) -> Option<ComponentId>
Type-erased equivalent of Components::resource_id()
.
Sourcepub fn resource_id<T: Resource>(&self) -> Option<ComponentId>
pub fn resource_id<T: Resource>(&self) -> Option<ComponentId>
Returns the ComponentId
of the given Resource
type T
.
The returned ComponentId
is specific to the Components
instance
it was retrieved from and should not be used with another Components
instance.
Returns None
if the Resource
type has not
yet been initialized using ComponentsRegistrator::register_resource()
or ComponentsQueuedRegistrator::queue_register_resource()
.
use bevy_ecs::prelude::*;
let mut world = World::new();
#[derive(Resource, Default)]
struct ResourceA;
let resource_a_id = world.init_resource::<ResourceA>();
assert_eq!(resource_a_id, world.components().resource_id::<ResourceA>().unwrap())
§See also
Sourcepub fn iter_registered(&self) -> impl Iterator<Item = &ComponentInfo> + '_
pub fn iter_registered(&self) -> impl Iterator<Item = &ComponentInfo> + '_
Gets an iterator over all components fully registered with this instance.
Trait Implementations§
Source§impl Debug for Components
impl Debug for Components
Source§impl Default for Components
impl Default for Components
Source§fn default() -> Components
fn default() -> Components
Source§impl<'a> SystemParam for &'a Components
impl<'a> SystemParam for &'a Components
Source§type Item<'w, 's> = &'w Components
type Item<'w, 's> = &'w Components
Self
, instantiated with new lifetimes. Read moreSource§fn init_state(_world: &mut World, _system_meta: &mut SystemMeta) -> Self::State
fn init_state(_world: &mut World, _system_meta: &mut SystemMeta) -> Self::State
World
access used by this SystemParam
and creates a new instance of this param’s State
.Source§unsafe fn get_param<'w, 's>(
_state: &'s mut Self::State,
_system_meta: &SystemMeta,
world: UnsafeWorldCell<'w>,
_change_tick: Tick,
) -> Self::Item<'w, 's>
unsafe fn get_param<'w, 's>( _state: &'s mut Self::State, _system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, _change_tick: Tick, ) -> Self::Item<'w, 's>
SystemParamFunction
. Read moreSource§unsafe fn new_archetype(
state: &mut Self::State,
archetype: &Archetype,
system_meta: &mut SystemMeta,
)
unsafe fn new_archetype( state: &mut Self::State, archetype: &Archetype, system_meta: &mut SystemMeta, )
Archetype
, registers the components accessed by this SystemParam
(if applicable).a Read moreSource§fn apply(state: &mut Self::State, system_meta: &SystemMeta, world: &mut World)
fn apply(state: &mut Self::State, system_meta: &SystemMeta, world: &mut World)
SystemParam
’s state.
This is used to apply Commands
during ApplyDeferred
.Source§fn queue(
state: &mut Self::State,
system_meta: &SystemMeta,
world: DeferredWorld<'_>,
)
fn queue( state: &mut Self::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )
ApplyDeferred
.Source§unsafe fn validate_param(
state: &Self::State,
system_meta: &SystemMeta,
world: UnsafeWorldCell<'_>,
) -> Result<(), SystemParamValidationError>
unsafe fn validate_param( state: &Self::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'_>, ) -> Result<(), SystemParamValidationError>
impl<'a> ReadOnlySystemParam for &'a Components
Auto Trait Implementations§
impl !Freeze for Components
impl !RefUnwindSafe for Components
impl !Send for Components
impl !Sync for Components
impl Unpin for Components
impl !UnwindSafe for Components
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
Source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
, which can then be
downcast
into Box<dyn ConcreteType>
where ConcreteType
implements Trait
.Source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
, which can then be further
downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.Source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.Source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.Source§impl<T> FromWorld for Twhere
T: Default,
impl<T> FromWorld for Twhere
T: Default,
Source§fn from_world(_world: &mut World) -> T
fn from_world(_world: &mut World) -> T
Creates Self
using default()
.