Enum Either 

pub enum Either<L, R> {
    Left(L),
    Right(R),
}

A view that is one of two statically-typed arms. See the module docs.

Variants

Left(L)

The left arm.

Right(R)

The right arm.

Trait Implementations

impl<State, L, R> View<State> for Either<L, R>

where State: 'static, L: View<State>, R: View<State>,

type Element = EitherWidget<<L as View<State>>::Element, <R as View<State>>::Element>

The retained widget this view produces.

fn build( &self, ctx: &mut BuildCtx<'_>, ) -> <Either<L, R> as View<State>>::Element

Materialise a fresh widget for this view.

fn rebuild( &self, prev: &Either<L, R>, element: &mut <Either<L, R> as View<State>>::Element, ctx: &mut BuildCtx<'_>, ) -> ChangeFlags

Reconcile prev (the previous view of the same type) against the live element, mutating it in place and reporting what changed.

fn teardown( &self, element: &mut <Either<L, R> as View<State>>::Element, ctx: &mut BuildCtx<'_>, )

Tear down element when this view is being removed.

fn message( &self, element: &mut <Either<L, R> as View<State>>::Element, state: &mut State, )

Deliver an event message to this view, mutating application state.