Enum GraphBuilderError 

pub enum GraphBuilderError {
    OccupiedInputPort(NodePort),
    OccupiedOutputPort(NodePort),
    CyclicGraph,
    SymbolError(SymbolError),
    ConnectError(ConnectError),
}

Error in building a graph with a GraphBuilder

Variants

OccupiedInputPort(NodePort)

Tried to add an edge to a in-port that already has an incoming edge.

OccupiedOutputPort(NodePort)

Tried to add an edge from an out-port that already has an outgoing edge.

CyclicGraph

The edges (dependencies) in a Graph contained a cycle

SymbolError(SymbolError)

An error in a (supposed) qualified name

ConnectError(ConnectError)

Error from super::portgraph library that edge could not be added, e.g. if the source or target node-indices do not exist.

Trait Implementations

impl Debug for GraphBuilderError

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

Formats the value using the given formatter.

impl Display for GraphBuilderError

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

Formats the value using the given formatter.

impl Error for GraphBuilderError

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<ConnectError> for GraphBuilderError

fn from(source: ConnectError) -> Self

Converts to this type from the input type.

impl From<SymbolError> for GraphBuilderError

fn from(source: SymbolError) -> Self

Converts to this type from the input type.