Enum SchemaError 

#[non_exhaustive]
pub enum SchemaError {
    VertexNotFound(String),
    DuplicateVertex(String),
    DuplicateEdge {
        src: String,
        tgt: String,
        kind: String,
    },
    DuplicateHyperEdge(String),
    InvalidEdgeSource {
        kind: String,
        src_kind: String,
        permitted: String,
    },
    InvalidEdgeTarget {
        kind: String,
        tgt_kind: String,
        permitted: String,
    },
    UnknownEdgeKind(String),
    UnknownVertexKind(String),
    EmptySchema,
    UnknownEntryVertex(String),
    LayoutConstraintsOnAbstractBuild,
}

Errors that can occur during schema construction and validation.

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.

VertexNotFound(String)

A vertex ID was referenced but not found in the schema.

DuplicateVertex(String)

A duplicate vertex ID was added to the schema.

DuplicateEdge

A duplicate edge was added to the schema.

Fields

src: String

Source vertex ID.

tgt: String

Target vertex ID.

kind: String

Edge kind.

DuplicateHyperEdge(String)

A duplicate hyper-edge ID was added to the schema.

InvalidEdgeSource

An edge kind violates the protocol’s edge rules.

Fields

kind: String

The edge kind.

src_kind: String

The actual source vertex kind.

permitted: String

Comma-separated list of permitted source kinds.

InvalidEdgeTarget

An edge kind violates the protocol’s edge rules (target).

Fields

kind: String

The edge kind.

tgt_kind: String

The actual target vertex kind.

permitted: String

Comma-separated list of permitted target kinds.

UnknownEdgeKind(String)

An edge kind is not recognized by the protocol.

UnknownVertexKind(String)

A vertex kind is not recognized by the protocol’s schema theory.

EmptySchema

The schema has no vertices.

UnknownEntryVertex(String)

A declared entry vertex does not exist in the schema.

LayoutConstraintsOnAbstractBuild

SchemaBuilder::build_abstract was called on a builder that has accumulated constraints in the layout enrichment fibre. Abstract schemas must carry no layout witnesses; call build_decorated if a decorated schema was intended.

Trait Implementations

impl Debug for SchemaError

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

Formats the value using the given formatter.

impl Display for SchemaError

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

Formats the value using the given formatter.

impl Error for SchemaError

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.