Struct TransitionError 

pub struct TransitionError { /* private fields */ }

Error returned when an invalid state machine transition is attempted.

Contains the source state and the event that was rejected. Fields are private to enforce construction through TransitionError::new.

Implementations

impl TransitionError

pub fn new(from: impl Into<String>, event: impl Into<String>) -> Self

Creates a new transition error for the given state and event.

pub fn from_state(&self) -> &str

Returns the state the resource was in when the invalid transition was attempted.

pub fn event(&self) -> &str

Returns the event that was rejected.

Trait Implementations

impl Clone for TransitionError

fn clone(&self) -> TransitionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TransitionError

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

Formats the value using the given formatter.

impl Display for TransitionError

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

Formats the value using the given formatter.

impl Error for TransitionError

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.

impl From<TransitionError> for CoreError

fn from(source: TransitionError) -> Self

Converts to this type from the input type.

impl PartialEq for TransitionError

fn eq(&self, other: &TransitionError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for TransitionError

impl StructuralPartialEq for TransitionError