pub struct Conditional<S, C> { /* private fields */ }Expand description
Wraps a System, skipping it for a tick whenever C::should_run
returns false.
Trait Implementations§
Source§impl<S: System, C: RunCondition> System for Conditional<S, C>
impl<S: System, C: RunCondition> System for Conditional<S, C>
fn run(&mut self, world: &World, resources: &Resources)
Source§fn name(&self) -> &'static str
fn name(&self) -> &'static str
Human-readable identifier for this system, used in error/trace output
so a missing-resource failure can be pinned to the system that needs
it instead of just the resource name. Defaults to the type name of
the
System impl; FunctionSystem overrides this with the name
of the wrapped function/closure, which is far more legible.Source§fn requires(&self) -> Vec<RequiredResource>
fn requires(&self) -> Vec<RequiredResource>
Resource types this system needs present, derived automatically from
its bare
Res/ResMut parameters. App
checks these before running a non-convergent stage’s systems and
panics with a clear message naming the missing resource(s) rather
than letting a param fetch panic deep inside whichever system happens
to run first.Auto Trait Implementations§
impl<S, C> Freeze for Conditional<S, C>where
S: Freeze,
impl<S, C> RefUnwindSafe for Conditional<S, C>where
S: RefUnwindSafe,
C: RefUnwindSafe,
impl<S, C> Send for Conditional<S, C>
impl<S, C> Sync for Conditional<S, C>
impl<S, C> Unpin for Conditional<S, C>
impl<S, C> UnsafeUnpin for Conditional<S, C>where
S: UnsafeUnpin,
impl<S, C> UnwindSafe for Conditional<S, C>where
S: UnwindSafe,
C: UnwindSafe,
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
Mutably borrows from an owned value. Read more
impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
impl<T> Component for 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>
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.Source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
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.Source§fn 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.Source§fn 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.Source§impl<T> DowncastSync for T
impl<T> DowncastSync for T
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more