pub trait ValueDefault:
Send
+ Sync
+ NonLocalValue
+ ValueDebug {
// Required method
fn value_default() -> Vc<Self>
where Self: Sized;
}Expand description
Vc<T> analog to the Default trait.
Implementing this trait on T will make Vc::default() produce
T::value_default().
There are two ways to implement this trait:
- Annotating with
#[turbo_tasks::value_impl]: this will makeVc::default()always return the same underlying value (i.e. a singleton). - No annotations: this will make
Vc::default()always return a different value.
Required Methods§
fn value_default() -> Vc<Self>where
Self: Sized,
Trait Implementations§
Source§impl VcValueTrait for Box<dyn ValueDefault>
impl VcValueTrait for Box<dyn ValueDefault>
type ValueTrait = dyn ValueDefault
Source§fn get_trait_type_id() -> TraitTypeId
fn get_trait_type_id() -> TraitTypeId
Returns the type id of the trait object.
Source§fn get_impl_vtables() -> &'static VTableRegistry<Self::ValueTrait>
fn get_impl_vtables() -> &'static VTableRegistry<Self::ValueTrait>
Returns the vtable for an implementation of this trait.
Panics if ValueTypeId does not implement the trait.