pub struct Res<'w, T: Resource> { /* private fields */ }
Expand description
Shared borrow of a Resource
.
See the Resource
documentation for usage.
If you need a unique mutable borrow, use ResMut
instead.
Panics
Panics when used as a SystemParameter
if the resource does not exist.
Use Option<Res<T>>
instead if the resource might not always exist.
Implementations§
source§impl<'w, T: Resource> Res<'w, T>
impl<'w, T: Resource> Res<'w, T>
pub fn clone(this: &Self) -> Self
sourcepub fn is_added(&self) -> bool
pub fn is_added(&self) -> bool
Returns true
if the resource was added after the system last ran.
sourcepub fn is_changed(&self) -> bool
pub fn is_changed(&self) -> bool
Returns true
if the resource was added or mutably dereferenced after the system last ran.
pub fn into_inner(self) -> &'w T
Trait Implementations§
source§impl<'w, 'a, T: Resource> IntoIterator for &'a Res<'w, T>where
&'a T: IntoIterator,
impl<'w, 'a, T: Resource> IntoIterator for &'a Res<'w, T>where
&'a T: IntoIterator,
Auto Trait Implementations§
impl<'w, T> RefUnwindSafe for Res<'w, T>where
T: RefUnwindSafe,
impl<'w, T> Send for Res<'w, T>
impl<'w, T> Sync for Res<'w, T>
impl<'w, T> Unpin for Res<'w, T>
impl<'w, T> UnwindSafe for Res<'w, T>where
T: RefUnwindSafe,
Blanket Implementations§
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn 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 moresource§fn 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 moresource§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. Read moresource§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. Read moresource§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<S, T> ParallelSlice<T> for Swhere
T: Sync,
S: AsRef<[T]>,
impl<S, T> ParallelSlice<T> for Swhere
T: Sync,
S: AsRef<[T]>,
source§fn par_chunk_map<F, R>(
&self,
task_pool: &TaskPool,
chunk_size: usize,
f: F
) -> Vec<R, Global> ⓘwhere
F: Fn(&[T]) -> R + Send + Sync,
R: 'static + Send,
fn par_chunk_map<F, R>(
&self,
task_pool: &TaskPool,
chunk_size: usize,
f: F
) -> Vec<R, Global> ⓘwhere
F: Fn(&[T]) -> R + Send + Sync,
R: 'static + Send,
Splits the slice in chunks of size
chunks_size
or less and maps the chunks
in parallel across the provided task_pool
. One task is spawned in the task pool
for every chunk. Read moresource§fn par_splat_map<F, R>(
&self,
task_pool: &TaskPool,
max_tasks: Option<usize>,
f: F
) -> Vec<R, Global> ⓘwhere
F: Fn(&[T]) -> R + Send + Sync,
R: 'static + Send,
fn par_splat_map<F, R>(
&self,
task_pool: &TaskPool,
max_tasks: Option<usize>,
f: F
) -> Vec<R, Global> ⓘwhere
F: Fn(&[T]) -> R + Send + Sync,
R: 'static + Send,
Splits the slice into a maximum of
max_tasks
chunks, and maps the chunks in parallel
across the provided task_pool
. One task is spawned in the task pool for every chunk. Read more