Struct Resources 

pub struct Resources { /* private fields */ }

Type-keyed singleton storage: one value per resource type.

Implementations

impl Resources

pub fn new() -> Resources

An empty store.

pub fn insert<T>(&mut self, value: T) -> Option<T>

where T: Any + Send,

Insert a resource, returning the previous instance of the same type if one was present. Replaces in place when the type is already present, so a per-frame republish reuses the existing allocation.

pub fn get<T>(&self) -> Option<&T>

where T: Any,

Borrow the resource of type T, if one is present.

pub fn get_mut<T>(&mut self) -> Option<&mut T>

where T: Any,

Mutably borrow the resource of type T, if one is present.

pub fn remove<T>(&mut self) -> Option<T>

where T: Any,

Remove and return the resource of type T, if one is present.

pub fn take<T>(&mut self) -> Option<T>

where T: Any + Send + Default,

Take the resource value, leaving T::default() parked in its slot so a later insert republish reuses the allocation. None when the type was never inserted; a per-frame take/put cycle never re-boxes.

pub fn contains<T>(&self) -> bool

where T: Any,

Whether a resource of type T is present.

Trait Implementations

impl Default for Resources

fn default() -> Resources

Returns the “default value” for a type.