pub struct Write<'a, T, F = DefaultProvider> where
T: 'a, { /* private fields */ }
Expand description
Allows to fetch a resource in a system mutably.
If the resource isn’t strictly required, you should use Option<Write<T>>
.
Type parameters
T
: The type of the resourceF
: The setup handler (default:DefaultProvider
)
Trait Implementations
sourceimpl<'a, 'b, T> Join for &'a mut Write<'b, T> where
&'a mut T: Join,
T: Resource,
impl<'a, 'b, T> Join for &'a mut Write<'b, T> where
&'a mut T: Join,
T: Resource,
sourceunsafe fn open(self) -> (Self::Mask, Self::Value)
unsafe fn open(self) -> (Self::Mask, Self::Value)
Open this join by returning the mask and the storages. Read more
sourceunsafe fn get(v: &mut Self::Value, i: Index) -> Self::Type
unsafe fn get(v: &mut Self::Value, i: Index) -> Self::Type
Get a joined component value by a given index. Read more
sourcefn is_unconstrained() -> bool
fn is_unconstrained() -> bool
If this Join
typically returns all indices in the mask, then iterating
over only it or combined with other joins that are also dangerous
will cause the JoinIter
/ParJoin
to go through all indices which
is usually not what is wanted and will kill performance. Read more
sourceimpl<'a, 'b, T> ParJoin for &'a mut Write<'b, T> where
&'a mut T: ParJoin,
T: Resource,
impl<'a, 'b, T> ParJoin for &'a mut Write<'b, T> where
&'a mut T: ParJoin,
T: Resource,
sourcefn par_join(self) -> JoinParIter<Self> where
Self: Sized,
fn par_join(self) -> JoinParIter<Self> where
Self: Sized,
Create a joined parallel iterator over the contents.
sourceimpl<'a, T, F> SystemData<'a> for Write<'a, T, F> where
T: Resource,
F: SetupHandler<T>,
impl<'a, T, F> SystemData<'a> for Write<'a, T, F> where
T: Resource,
F: SetupHandler<T>,
sourcefn fetch(world: &'a World) -> Write<'a, T, F>
fn fetch(world: &'a World) -> Write<'a, T, F>
Fetches the system data from World
. Note that this is only specified
for one concrete lifetime 'a
, you need to implement the
SystemData
trait for every possible lifetime. Read more
Auto Trait Implementations
impl<'a, T, F = DefaultProvider> !RefUnwindSafe for Write<'a, T, F>
impl<'a, T, F> Send for Write<'a, T, F> where
F: Send,
T: Send,
impl<'a, T, F> Sync for Write<'a, T, F> where
F: Sync,
T: Sync,
impl<'a, T, F> Unpin for Write<'a, T, F> where
F: Unpin,
impl<'a, T, F = DefaultProvider> !UnwindSafe for Write<'a, T, F>
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<'a, T> DynamicSystemData<'a> for T where
T: SystemData<'a>,
impl<'a, T> DynamicSystemData<'a> for T where
T: SystemData<'a>,
type Accessor = StaticAccessor<T>
type Accessor = StaticAccessor<T>
The accessor of the SystemData
, which specifies the read and write
dependencies and does the fetching. Read more
sourcefn setup(&StaticAccessor<T>, world: &mut World)
fn setup(&StaticAccessor<T>, world: &mut World)
Sets up World
for fetching this system data.