Struct TransitionError 

pub struct TransitionError<S: Display, E: Display> {
    pub from: S,
    pub event: E,
}

Error returned when a transition is not allowed.

Examples

use ironflow_engine::fsm::TransitionError;

let err: TransitionError<String, String> = TransitionError {
    from: "Completed".to_string(),
    event: "picked_up".to_string(),
};
assert!(err.to_string().contains("Completed"));

Fields

from: S

Current state when the invalid transition was attempted.

event: E

Event that was rejected.

Trait Implementations

impl<S: Clone + Display, E: Clone + Display> Clone for TransitionError<S, E>

fn clone(&self) -> TransitionError<S, E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: Debug + Display, E: Debug + Display> Debug for TransitionError<S, E>

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

Formats the value using the given formatter.

impl<S: Display, E: Display> Display for TransitionError<S, E>

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

Formats the value using the given formatter.

impl<S: Debug + Display, E: Debug + Display> Error for TransitionError<S, E>

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.