Struct OrderingCycleError 

pub struct OrderingCycleError {
    pub cycle: Vec<SystemId>,
    pub names: Vec<&'static str>,
}

Error returned when a cycle is detected in system orderings.

A cycle means the ordering constraints are impossible to satisfy. For example: A before B, B before C, C before A is a cycle.

Fields

cycle: Vec<SystemId>

Systems involved in the cycle (in cycle order).

names: Vec<&'static str>

Human-readable system names for debugging.

Implementations

impl OrderingCycleError

pub fn new(cycle: Vec<SystemId>, names: Vec<&'static str>) -> Self

Creates a new cycle error.

pub fn describe(&self) -> String

Returns a human-readable description of the cycle.

Trait Implementations

impl Clone for OrderingCycleError

fn clone(&self) -> OrderingCycleError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OrderingCycleError

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

Formats the value using the given formatter.

impl Display for OrderingCycleError

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

Formats the value using the given formatter.

impl Error for OrderingCycleError

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.