Struct Res 

pub struct Res<'w, T: Resource> { /* private fields */ }

Shared reference to a resource in World.

Analogous to Bevy’s Res<T>.

Appears in handler function signatures to declare a read dependency. Derefs to the inner value transparently.

Cloning

Res<T> is Copy + Clone regardless of T — the wrapped reference is &T, which is always Copy. To clone the inner value, use (*res).clone() or res.to_owned(). Calling res.clone() returns Res<T>, not T — same shadowing pattern as Bevy’s Res<T>.

For exclusive write access, use ResMut<T>. For optional read access (no panic if unregistered), use Option<Res<T>>.

Construction is pub(crate) — only the dispatch layer creates these.

Trait Implementations

impl<T: Resource> Clone for Res<'_, T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug + Resource> Debug for Res<'_, T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Resource> Deref for Res<'_, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T: Resource> Param for Res<'_, T>

type State = ResourceId

Opaque state cached at build time (e.g. ResourceId).

type Item<'w> = Res<'w, T>

The item produced at dispatch time.

fn init(registry: &Registry) -> ResourceId

Resolve state from the registry. Called once at build time.

unsafe fn fetch<'w>(world: &'w World, state: &'w mut ResourceId) -> Res<'w, T>

Fetch the item using cached state.

fn resource_id(state: &ResourceId) -> Option<ResourceId>

The ResourceId this param accesses, if any.

impl<T: Resource> Copy for Res<'_, T>