Struct bones_ecs::system::ResInit

pub struct ResInit<'a, T: HasSchema + FromWorld>(/* private fields */);

SystemParam for getting read access to a resource and initialzing it if it doesn’t already exist.

Use Res if you don’t want to automatically initialize the resource.

Trait Implementations

impl<'a, T: HasSchema + FromWorld> Deref for ResInit<'a, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, T: HasSchema + FromWorld> SystemParam for ResInit<'a, T>

type State = AtomicResource<T>

The intermediate state for the parameter, that may be extracted from the world.

type Param<'p> = ResInit<'p, T>

The type of the parameter, ranging over the lifetime of the intermediate state.

fn get_state(world: &World) -> Self::State

This is called to produce the intermediate state of the system parameter.

fn borrow<'s>(_world: &'s World, state: &'s mut Self::State) -> Self::Param<'s>

This is used create an instance of the system parame, possibly borrowed from the intermediate parameter state.