Enum OntologyError 

#[non_exhaustive]
pub enum OntologyError {
    EmptyValue {
        field: &'static str,
    },
    IdentityConflict {
        kind: OntologyRecordKind,
        id: String,
    },
    UnknownConcept(ConceptId),
    UnknownRelationType(RelationTypeId),
    CycleDetected {
        relation: RelationTypeId,
        subject: ConceptId,
        object: ConceptId,
    },
}

Validation and consistency errors for ontology operations.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

EmptyValue

A required identifier or label was empty.

Fields

field: &'static str

Name of the invalid field.

IdentityConflict

An identity was reused with a different definition.

Fields

kind: OntologyRecordKind

Kind of ontology record that conflicted.

id: String

Reused identifier.

UnknownConcept(ConceptId)

An axiom referenced a concept that has not been registered.

UnknownRelationType(RelationTypeId)

An axiom or query referenced an unknown relation type.

CycleDetected

An axiom would create a cycle in an acyclic relation.

Fields

relation: RelationTypeId

Relation whose acyclic invariant would be broken.

subject: ConceptId

Proposed axiom subject.

object: ConceptId

Proposed axiom object.

Trait Implementations

impl Clone for OntologyError

fn clone(&self) -> OntologyError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OntologyError

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

Formats the value using the given formatter.

impl Display for OntologyError

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

Formats the value using the given formatter.

impl Eq for OntologyError

impl Error for OntologyError

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 PartialEq for OntologyError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OntologyError