Enum CommandHandler 

pub enum CommandHandler {
    Sync(fn(&mut App, &[String]) -> CommandOutcome),
    Async(fn(&mut App, &[String]) -> Vec<UserAction>),
}

What a command’s handler does when invoked.

Variants

Sync(fn(&mut App, &[String]) -> CommandOutcome)

Synchronous: mutate AppState in place. Returns a CommandOutcome describing the next UI action (push modal, surface error, …).

Async(fn(&mut App, &[String]) -> Vec<UserAction>)

Asynchronous: returns a list of UserActions to dispatch to the backend worker. The handler may also mutate AppState (e.g. push a System block confirming the request).

Trait Implementations

impl Clone for CommandHandler

fn clone(&self) -> CommandHandler

Returns a duplicate of the value.

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

Performs copy-assignment from source.