Enum MessageResult 

pub enum MessageResult<Action> {
    Action(Action),
    RequestRebuild,
    Nop,
    Stale,
}

The possible outcomes from a View::message

Variants

Action(Action)

An action for a parent message handler to use

This allows for sub-sections of your app to use an elm-like architecture

RequestRebuild

A view has requested a rebuild, even though its value hasn’t changed.

This can happen for example by some kind of async action. An example would be an async virtualized list, which fetches new entries, and requires a rebuild for the new entries.

Nop

This event had no impact on the app state, or the impact it did have does not require the element tree to be recreated.

Stale

The view this message was being routed to no longer exists.

Implementations

impl<A> MessageResult<A>

pub fn map<B>(self, f: impl FnOnce(A) -> B) -> MessageResult<B>

Maps the action type A to B, i.e. MessageResult<A> to MessageResult<B>

Trait Implementations

impl<Action: Debug> Debug for MessageResult<Action>

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

Formats the value using the given formatter.

impl<Action> Default for MessageResult<Action>

fn default() -> MessageResult<Action>

Returns the “default value” for a type.