Struct BundleScratch

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pub struct BundleScratch { /* private fields */ }

Expand description

Enables pushing components to internal scratch space (uses a bump allocator), which can then be written as a dynamic bundle. The contents are cleared after each write and the allocated scratch space is reused across writes.

Also see BundleWriter.

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impl BundleScratch

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pub fn writer<'a>(&'a mut self) -> BundleWriter<'a>

Creates a new BundleWriter using this scratch space. For safety / correctness, this will clear any existing components.

Note that for performance reasons this will not clear the internal allocator. To avoid leaking, make sure every component pushed to the BundleWriter is followed by either a BundleWriter::write or a BundleScratch::manual_drop.

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pub fn is_empty(&self) -> bool

Returns true if there are currently no components stored in the scratch space.

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pub unsafe fn manual_drop(&mut self, components: &Components)

This will drop all components currently stored in the scratch space. This is generally used to ensure drops occur in error scenarios.

§Safety

components must be from the same world as the components that were pushed to this writer.

Trait Implementations§

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impl Default for BundleScratch

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fn default() -> BundleScratch

Returns the “default value” for a type. Read more

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impl Send for BundleScratch
where Bump: Send,

Auto Trait Implementations§

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impl !UnwindSafe for BundleScratch

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> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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impl<T> DowncastSend for T
where T: Any + Send,

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fn into_any_send(self: Box<T>) -> Box<dyn Any + Send>

Converts Box<Trait> (where Trait: DowncastSend) to Box<dyn Any + Send>, which can then be downcast into Box<ConcreteType> where ConcreteType implements Trait.

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