[−][src]Struct components_arena::ComponentClassToken
Component class static shared data.
In the no-no_std
environment it can be stored inside static
ComponentClassMutex
:
macro_attr! { #[derive(Component!)] struct MyComponent { /* ... */ } } static MY_COMPONENT: ComponentClassMutex<MyComponent> = ComponentClassMutex::new(); // ... let mut arena = Arena::new(&mut MY_COMPONENT.lock().unwrap()); let id = arena.insert(|id| (MyComponent { /* ... */ }, id));
In the no_std
environment a custom solution should be used to store ComponentClassToken
.
Implementations
impl<C: ComponentClass> ComponentClassToken<C>
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pub fn new() -> Option<ComponentClassToken<C>>
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Creates components shared data storage on first call for every component type C
.
All subsequent calls will return None
.
Trait Implementations
impl<C: ComponentClass> RefUnwindSafe for ComponentClassToken<C>
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impl<C: ComponentClass> Send for ComponentClassToken<C>
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impl<C: ComponentClass> Sync for ComponentClassToken<C>
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impl<C: ComponentClass> Unpin for ComponentClassToken<C>
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impl<C: ComponentClass> UnwindSafe for ComponentClassToken<C>
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Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
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<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, 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>,