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Ext

elevator_core::query

Struct Ext 

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pub struct Ext<T>(/* private fields */);
Expand description

Marker type for querying extension components.

Extension values are read by reference from type-erased storage.

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impl<T: 'static + Send + Sync> WorldQuery for &Ext<T>

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type Item<'w> = &'w T

The item yielded per entity.
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fn fetch(world: &World, id: EntityId) -> Option<Self::Item<'_>>

Try to fetch data for a single entity. Returns None if missing.
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fn contains(world: &World, id: EntityId) -> bool

Check component presence without extracting data.

Auto Trait Implementations§

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impl<T> Freeze for Ext<T>

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impl<T> RefUnwindSafe for Ext<T>
where T: RefUnwindSafe,

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impl<T> Send for Ext<T>
where T: Send,

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impl<T> Sync for Ext<T>
where T: Sync,

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impl<T> Unpin for Ext<T>
where T: Unpin,

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impl<T> UnsafeUnpin for Ext<T>

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impl<T> UnwindSafe for Ext<T>
where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.