Struct bevy_ecs::event::EventReader
source · [−]pub struct EventReader<'w, 's, T: Resource> { /* private fields */ }
Expand description
Reads events of type T
in order and tracks which events have already been read.
Implementations
sourceimpl<'w, 's, T: Resource> EventReader<'w, 's, T>
impl<'w, 's, T: Resource> EventReader<'w, 's, T>
sourcepub fn iter(&mut self) -> impl DoubleEndedIterator<Item = &T>
pub fn iter(&mut self) -> impl DoubleEndedIterator<Item = &T>
Iterates over the events this EventReader
has not seen yet. This updates the
EventReader
’s event counter, which means subsequent event reads will not include events
that happened before now.
sourcepub fn iter_with_id(
&mut self
) -> impl DoubleEndedIterator<Item = (&T, EventId<T>)>
pub fn iter_with_id(
&mut self
) -> impl DoubleEndedIterator<Item = (&T, EventId<T>)>
sourcepub fn len(&self) -> usize
pub fn len(&self) -> usize
Determines the number of events available to be read from this EventReader
without consuming any.
Trait Implementations
sourceimpl<'w, 's, T: Resource> SystemParam for EventReader<'w, 's, T>
impl<'w, 's, T: Resource> SystemParam for EventReader<'w, 's, T>
type Fetch = EventReaderState<(<Local<'s, (usize, PhantomData<T>)> as SystemParam>::Fetch, <Res<'w, Events<T>> as SystemParam>::Fetch), T>
Auto Trait Implementations
impl<'w, 's, T> RefUnwindSafe for EventReader<'w, 's, T> where
T: RefUnwindSafe,
impl<'w, 's, T> Send for EventReader<'w, 's, T>
impl<'w, 's, T> Sync for EventReader<'w, 's, T>
impl<'w, 's, T> Unpin for EventReader<'w, 's, T>
impl<'w, 's, T> !UnwindSafe for EventReader<'w, 's, T>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
sourcefn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
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
. Read more
sourcefn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
sourcefn as_any(&self) -> &(dyn Any + 'static)
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. Read more
sourcefn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
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. Read more
sourceimpl<T> DowncastSync for T where
T: Any + Send + Sync,
impl<T> DowncastSync for T where
T: Any + Send + Sync,
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
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
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more