Enum Error 

pub enum Error {
    Definition(String),
    Validation(String),
    Render(String),
    Serialization(Error),
    NoIntents,
    NoTransitionTrigger(String),
    NoStateMachine(String),
    UndeclaredTransition {
        action: String,
        event: String,
    },
    AmbiguousTransition {
        event: String,
    },
}

Variants

Definition(String)

Validation(String)

Render(String)

Serialization(Error)

NoIntents

Caller supplied an empty intents slice — no render target exists. Returned by render entry points instead of a silent "unknown"; defined here so non-visual renderers can consume it. (D-08)

NoTransitionTrigger(String)

An action selected for transition derivation declares no transition_trigger, so no event-to-target mapping exists.

NoStateMachine(String)

Transition derivation was requested for a service with no state machine.

UndeclaredTransition

An action’s transition_trigger names an event that no declared transition carries — the EXEC-04 drift condition, by construction.

Fields

action: String

event: String

AmbiguousTransition

A single event fans out to more than one target state across its transitions; a TransitionPlan cannot pick one unambiguously.

Fields

event: String

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.