Enum ValidationError 

pub enum ValidationError {
    InvalidTransition {
        from: String,
        to: String,
    },
    Cycle(String),
    MissingDependency {
        task: String,
        dep: String,
    },
    DuplicateTask(String),
    SelfDependency(String),
}

Errors raised when validating DAG structure or state transitions.

Variants

InvalidTransition

A state machine transition that is not allowed.

Fields

from: String

The state being transitioned from.

to: String

The disallowed target state.

Cycle(String)

The DAG contains a cycle.

MissingDependency

A task declared a dependency that was never registered.

Fields

task: String

The task that declared the dependency.

dep: String

The unknown dependency id.

DuplicateTask(String)

Two tasks were registered with the same id.

SelfDependency(String)

A task depends on itself.

Trait Implementations

impl Debug for ValidationError

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

Formats the value using the given formatter.

impl Display for ValidationError

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

Formats the value using the given formatter.

impl Error for ValidationError

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<ValidationError> for DagExecutorError

fn from(source: ValidationError) -> Self

Converts to this type from the input type.