Enum Error 

pub enum Error {
    CycleDetected {
        message: String,
    },
    MissingDependency {
        task: String,
        dependency: String,
    },
    MissingDependencies {
        missing: Vec<(String, String)>,
    },
    TopologicalSortFailed {
        reason: String,
    },
}

Errors that can occur during task graph operations.

Variants

CycleDetected

A dependency cycle was detected in the graph.

Fields

message: String

Human-readable description of the cycle.

MissingDependency

A task depends on another task that doesn’t exist.

Fields

task: String

The task that has the missing dependency.

dependency: String

The name of the missing dependency.

MissingDependencies

Multiple missing dependencies were found.

Fields

missing: Vec<(String, String)>

List of (task, missing_dependency) pairs.

TopologicalSortFailed

Failed to perform topological sort.

Fields

reason: String

Reason for the failure.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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, f: &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.