Struct specs::Write

pub struct Write<'a, T, F = DefaultProvider> where
    T: 'a,  { /* fields omitted */ }

Allows to fetch a resource in a system mutably.

If the resource isn't strictly required, you should use Option<Write<T>>.

Type parameters

• T: The type of the resource
• F: The setup handler (default: DefaultProvider)

Trait Implementations

impl<'a, T, F> Deref for Write<'a, T, F> where
    T: Resource, 

type Target = T

The resulting type after dereferencing.

Important traits for &'a mut W

impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn deref(&self) -> &T

Dereferences the value.

impl<'a, T, F> SystemData<'a> for Write<'a, T, F> where
    F: SetupHandler<T>,
    T: Resource, 

fn setup(res: &mut Resources)

Sets up the system data for fetching it from the Resources.

fn fetch(res: &'a Resources) -> Write<'a, T, F>

Fetches the system data from Resources. Note that this is only specified for one concrete lifetime 'a, you need to implement the SystemData trait for every possible lifetime.

Important traits for Vec<u8>

impl Write for Vec<u8>

fn reads() -> Vec<ResourceId>

Returns all read dependencies as fetched from Self::fetch.

Important traits for Vec<u8>

impl Write for Vec<u8>

fn writes() -> Vec<ResourceId>

Returns all write dependencies as fetched from Self::fetch.

impl<'a, T, F> DerefMut for Write<'a, T, F> where
    T: Resource, 

Important traits for &'a mut W

impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

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

Mutably dereferences the value.

impl<'a, T, F> From<FetchMut<'a, T>> for Write<'a, T, F>

fn from(inner: FetchMut<'a, T>) -> Write<'a, T, F>

Performs the conversion.