Struct Registry 

pub struct Registry { /* private fields */ }

Type-to-pointer mapping shared between WorldBuilder and World.

Contains only the type registry — no storage backing. Passed to IntoHandler::into_handler and Param::init so handlers can resolve ResourceIds during driver setup.

Obtained via WorldBuilder::registry() or World::registry().

Implementations

impl Registry

pub fn id<T: Resource>(&self) -> ResourceId

Resolve the ResourceId for a type. Cold path — uses HashMap lookup.

Panics

Panics if the resource type was not registered.

pub fn try_id<T: Resource>(&self) -> Option<ResourceId>

Try to resolve the ResourceId for a type. Returns None if the type was not registered.

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

Returns true if a resource of type T has been registered.

pub fn len(&self) -> usize

Returns the number of registered resources.

pub fn is_empty(&self) -> bool

Returns true if no resources have been registered.

pub fn check_access(&self, accesses: &[(Option<ResourceId>, &str)])

Validate that a set of parameter accesses don’t conflict.

Two accesses conflict when they target the same ResourceId (same pointer). O(n²) pairwise comparison — handler arity is 1-8, so this is trivially fast at build time.

Panics

Panics if any resource is accessed by more than one parameter.