Trait legion::query::Fetch

pub trait Fetch: IntoIndexableIter + Send + Sync {
    type Data;
    fn into_components(self) -> Self::Data;
    fn find<T: 'static>(&self) -> Option<&[T]>;
    fn find_mut<T: 'static>(&mut self) -> Option<&mut [T]>;
    fn version<T: Component>(&self) -> Option<u64>;
    fn accepted(&mut self);
}

A type which holds onto a slice of entity data retrieved from a single archetype.

Associated Types

type Data

The inner data representation fetched from the archetype. Typically a slice reference.

Required methods

fn into_components(self) -> Self::Data

Converts the fetch into the retrieved component slices

fn find<T: 'static>(&self) -> Option<&[T]>

Tries to find a slice of components, if this fetch contains the requested component type.

fn find_mut<T: 'static>(&mut self) -> Option<&mut [T]>

Tries to find a mutable slice of components, if this fetch contains the requested component type.

fn version<T: Component>(&self) -> Option<u64>

Tries to find the component slice version of a component, if this fetch contains the requested component type.

fn accepted(&mut self)

Indicates that the archetype is going to be provided to the user. Component slice versions are incremented here.

Implementors