Struct RequiredComponentsRegistrator 

pub struct RequiredComponentsRegistrator<'a, 'w> { /* private fields */ }

This is a safe handle around ComponentsRegistrator and RequiredComponents to register required components.

Implementations

impl<'a, 'w> RequiredComponentsRegistrator<'a, 'w>

pub fn register_required<C: Component>(&mut self, constructor: fn() -> C)

Registers the Component C as an explicitly required component.

If the component was not already registered as an explicit required component then it is added as one, potentially overriding the constructor of a inherited required component, otherwise panics.

pub unsafe fn register_required_by_id<C: Component>( &mut self, component_id: ComponentId, constructor: fn() -> C, )

Registers the Component with the given component_id ID as an explicitly required component.

If the component was not already registered as an explicit required component then it is added as one, potentially overriding the constructor of a inherited required component, otherwise panics.

Safety

component_id must be a valid ComponentId for C in the Components instance of self.

pub unsafe fn register_required_dynamic_with( &mut self, component_id: ComponentId, constructor: impl FnOnce() -> RequiredComponentConstructor, )

Registers the Component with the given component_id ID as an explicitly required component.

If the component was not already registered as an explicit required component then it is added as one, potentially overriding the constructor of a inherited required component, otherwise panics.

Safety

• component_id must be valid in the Components instance of self;
• constructor must return a RequiredComponentConstructor that constructs a valid instance for the component with ID component_id.