Struct Transition 

pub struct Transition<S, C> { /* private fields */ }

A named transition from one state to another.

Implementations

impl<S, C> Transition<S, C>

where S: State,

pub fn new(name: impl Into<String>, to: S) -> Self

Create a transition that may be applied from any current state.

pub fn from(self, state: S) -> Self

Restrict this transition to a specific source state.

pub fn with_guard( self, guard: impl Fn(&S, &C) -> AppResult<()> + Send + Sync + 'static, ) -> Self

Add a guard that must allow the transition.

pub fn with_action( self, action: impl Fn(&S, &S, &C) -> AppResult<()> + Send + Sync + 'static, ) -> Self

Add an action that runs after guard validation and before the transition commits.

Returning an error aborts the transition without changing state or recording audit.

pub fn name(&self) -> &str

Transition name.