Struct ClosureTransition 

pub struct ClosureTransition<F, Res = ()> { /* private fields */ }

A wrapper that adapts a synchronous closure into a Transition.

The closure receives (From, &mut Bus) and returns Outcome<To, E>. Resources are not passed to the closure — closures that need typed resources should use a full #[transition] struct instead.

The Res type parameter allows ClosureTransition to be used in pipelines with any resource type — the resource is simply ignored during execution.

Implementations

impl<F, Res> ClosureTransition<F, Res>

pub fn new(label: impl Into<String>, f: F) -> Self

Create a new closure transition with the given label.

Trait Implementations

impl<F: Clone, Res> Clone for ClosureTransition<F, Res>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<F, From, To, E, Res> Transition<From, To> for ClosureTransition<F, Res>

where F: Fn(From, &mut Bus) -> Outcome<To, E> + Send + Sync + 'static, From: Send + 'static, To: Send + 'static, E: Send + Sync + Debug + 'static, Res: ResourceRequirement,

type Error = E

Domain-specific error type (e.g., AuthError, ValidationError)

type Resources = Res

The type of resources required by this transition. This follows the “Hard-Wired Types” principle from the Master Plan.

fn label(&self) -> String

Execute the transition.

fn run<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, state: From, _resources: &'life1 Self::Resources, bus: &'life2 mut Bus, ) -> Pin<Box<dyn Future<Output = Outcome<To, Self::Error>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Execute the transition.

fn description(&self) -> Option<String>

Returns a detailed description of what this transition does.

fn position(&self) -> Option<(f32, f32)>

Returns the visual position of this transition in a schematic. (x, y) coordinates.

fn bus_access_policy(&self) -> Option<BusAccessPolicy>

Optional transition-scoped Bus access policy (M143).

fn input_schema(&self) -> Option<Value>

Optional JSON Schema for the input type of this transition.