Enum GraphError 

#[non_exhaustive]
pub enum GraphError {
    LabelOverflow {
        used: usize,
    },
    NodeOverflow {
        used: usize,
    },
    MemoryBudget(MemError),
}

Errors returned by graph-engine 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.

LabelOverflow

The CSR’s edge-label id space is exhausted. Happens only when more than MAX_EDGE_LABELS distinct labels have been interned — in practice unreachable because the DSL ingress caps label length and realistic workloads use orders of magnitude fewer labels. Surfaced here so the failure mode is a typed error, not a silent wrap (the bug this crate was shipping before).

Fields

used: usize

NodeOverflow

The CSR’s node id space is exhausted. A single CsrIndex partition supports at most MAX_NODES_PER_CSR (≈ 4 billion) distinct nodes. Inserts beyond this limit are rejected rather than silently wrapping the u32 node index. Collections approaching this limit should be sharded across multiple partitions.

Fields

used: usize

MemoryBudget(MemError)

The memory governor rejected a reservation for a graph operation.

Callers should apply backpressure and retry after memory is released.

Trait Implementations

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 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<MemError> for GraphError

fn from(source: MemError) -> Self

Converts to this type from the input type.