[−][src]Struct oxygengine_core::ecs::prelude::Read
Allows to fetch a resource in a system immutably.
If the resource isn't strictly required, you should use Option<Read<T>>
.
Type parameters
T
: The type of the resourceF
: The setup handler (default:DefaultProvider
)
Trait Implementations
impl<'a, T, F> Deref for Read<'a, T, F> where
T: Resource,
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T: Resource,
impl<'a, T, F> From<Fetch<'a, T>> for Read<'a, T, F>
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impl<'a, 'b, T> Join for &'a Read<'b, T, DefaultProvider> where
T: Resource,
&'a T: Join,
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T: Resource,
&'a T: Join,
type Type = <&'a T as Join>::Type
Type of joined components.
type Value = <&'a T as Join>::Value
Type of joined storages.
type Mask = <&'a T as Join>::Mask
Type of joined bit mask.
unsafe fn open(
self
) -> (<&'a Read<'b, T, DefaultProvider> as Join>::Mask, <&'a Read<'b, T, DefaultProvider> as Join>::Value)
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self
) -> (<&'a Read<'b, T, DefaultProvider> as Join>::Mask, <&'a Read<'b, T, DefaultProvider> as Join>::Value)
unsafe fn get(
v: &mut <&'a Read<'b, T, DefaultProvider> as Join>::Value,
i: u32
) -> <&'a Read<'b, T, DefaultProvider> as Join>::Type
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v: &mut <&'a Read<'b, T, DefaultProvider> as Join>::Value,
i: u32
) -> <&'a Read<'b, T, DefaultProvider> as Join>::Type
fn is_unconstrained() -> bool
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fn join(self) -> JoinIter<Self>ⓘ
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fn maybe(self) -> MaybeJoin<Self>
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impl<'a, 'b, T> Join for &'a Read<'b, T, PanicHandler> where
T: Resource,
&'a T: Join,
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T: Resource,
&'a T: Join,
type Type = <&'a T as Join>::Type
Type of joined components.
type Value = <&'a T as Join>::Value
Type of joined storages.
type Mask = <&'a T as Join>::Mask
Type of joined bit mask.
unsafe fn open(
self
) -> (<&'a Read<'b, T, PanicHandler> as Join>::Mask, <&'a Read<'b, T, PanicHandler> as Join>::Value)
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self
) -> (<&'a Read<'b, T, PanicHandler> as Join>::Mask, <&'a Read<'b, T, PanicHandler> as Join>::Value)
unsafe fn get(
v: &mut <&'a Read<'b, T, PanicHandler> as Join>::Value,
i: u32
) -> <&'a Read<'b, T, PanicHandler> as Join>::Type
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v: &mut <&'a Read<'b, T, PanicHandler> as Join>::Value,
i: u32
) -> <&'a Read<'b, T, PanicHandler> as Join>::Type
fn is_unconstrained() -> bool
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fn join(self) -> JoinIter<Self>ⓘ
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fn maybe(self) -> MaybeJoin<Self>
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impl<'a, T, F> SystemData<'a> for Read<'a, T, F> where
F: SetupHandler<T>,
T: Resource,
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F: SetupHandler<T>,
T: Resource,
Auto Trait Implementations
impl<'a, T, F = DefaultProvider> !RefUnwindSafe for Read<'a, T, F>
impl<'a, T, F = DefaultProvider> !Send for Read<'a, T, F>
impl<'a, T, F = DefaultProvider> !Sync for Read<'a, T, F>
impl<'a, T, F> Unpin for Read<'a, T, F> where
F: Unpin,
F: Unpin,
impl<'a, T, F = DefaultProvider> !UnwindSafe for Read<'a, T, F>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Any for T where
T: Any,
T: Any,
fn get_type_id(&self) -> TypeId
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<'a, T> DynamicSystemData<'a> for T where
T: SystemData<'a>,
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T: SystemData<'a>,
type Accessor = StaticAccessor<T>
The accessor of the SystemData
, which specifies the read and write
dependencies and does the fetching. Read more
fn setup(&StaticAccessor<T>, world: &mut World)
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fn fetch(&StaticAccessor<T>, world: &'a World) -> T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> Resource for T where
T: Any,
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T: Any,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,