Enum GraphError 

pub enum GraphError {
    Disconnected,
    NegativeCycle,
    NegativeWeight,
    WrongGraphKind(String),
    InvalidEndpoint {
        edge: usize,
        node: usize,
        len: usize,
    },
    InvalidEdgeId {
        index: usize,
        id: usize,
        len: usize,
    },
    WeightOverflow(String),
    NonFiniteCost(String),
    InvalidControl(String),
    ControlStopped(String),
    NodeOutOfRange {
        node: usize,
        count: usize,
    },
    CertificateInvalid(String),
    InvalidAssignment(String),
    Unsupported(String),
}

Errors raised by graph construction, algorithms, and verifiers.

Variants

Disconnected

The graph is disconnected, so the requested result does not exist.

NegativeCycle

A negative-weight cycle makes shortest paths undefined.

NegativeWeight

A negative edge weight was supplied to an algorithm that forbids it.

WrongGraphKind(String)

The algorithm was called on the wrong kind of graph.

InvalidEndpoint

An edge referenced a node index outside the node range.

Fields

edge: usize

The offending edge id.

node: usize

The out-of-range node index.

len: usize

The number of nodes.

InvalidEdgeId

An edge id is not the storage index required by id-indexed consumers.

Fields

index: usize

The storage index where the edge was found.

id: usize

The offending edge id.

len: usize

The number of stored edge records.

WeightOverflow(String)

A graph weight sum or path relaxation overflowed its representation.

NonFiniteCost(String)

A floating-point or user-defined cost was not finite or comparable.

InvalidControl(String)

An algorithm control was internally inconsistent.

ControlStopped(String)

A work, memory, time, or cancellation bound stopped the algorithm.

NodeOutOfRange

A node index passed to an algorithm was outside the node range.

Fields

node: usize

The out-of-range node index.

count: usize

The number of nodes.

CertificateInvalid(String)

A submitted certificate failed verification.

InvalidAssignment(String)

An assignment matrix, policy, or submitted assignment was malformed.

Unsupported(String)

A staged feature is not yet implemented.

Trait Implementations

impl Clone for GraphError

fn clone(&self) -> GraphError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphError

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

Formats the value using the given formatter.

impl Display for GraphError

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

Formats the value using the given formatter.

impl Eq for GraphError

impl Error for GraphError

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<AlgebraError> for GraphError

fn from(err: AlgebraError) -> Self

Converts to this type from the input type.

impl PartialEq for GraphError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for GraphError