Struct ComponentDescriptor 

pub struct ComponentDescriptor { /* private fields */ }

A value describing a component or resource, which may or may not correspond to a Rust type.

Implementations

impl ComponentDescriptor

pub fn new<T>() -> ComponentDescriptor

where T: Component,

Create a new ComponentDescriptor for the type T.

pub unsafe fn new_with_layout( name: impl Into<Cow<'static, str>>, storage_type: StorageType, layout: Layout, drop: Option<for<'a> unsafe fn(OwningPtr<'a>)>, mutable: bool, clone_behavior: ComponentCloneBehavior, relationship_accessor: Option<RelationshipAccessorInitializer>, ) -> ComponentDescriptor

Create a new ComponentDescriptor.

Panics

Panics if layout does not have a size() that is a multiple of its alignment().

Safety

• the drop fn must be usable on a pointer with a value of the layout layout
• the component type must be safe to access from any thread (Send + Sync in rust terms)
• relationship_accessor must be valid for this component type if not None

pub fn new_resource<T>() -> ComponentDescriptor

where T: Resource,

👎Deprecated since 0.19.0:

use ComponentDescriptor::new()

Create a new ComponentDescriptor for a resource.

The StorageType for resources is always StorageType::Table.

pub fn storage_type(&self) -> StorageType

Returns a value indicating the storage strategy for the current component.

pub fn type_id(&self) -> Option<TypeId>

Returns the TypeId of the underlying component type. Returns None if the component does not correspond to a Rust type.

pub fn name(&self) -> DebugName

Returns the name of the current component.

pub fn mutable(&self) -> bool

Returns whether this component is mutable.

Trait Implementations

impl Clone for ComponentDescriptor

fn clone(&self) -> ComponentDescriptor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComponentDescriptor

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

Formats the value using the given formatter.