Enum GraphError 

pub enum GraphError {
    UnknownNode(NodeId),
    PadOutOfRange {
        node: NodeId,
        index: u8,
        direction: PadDir,
    },
    UnlinkedPad {
        node: NodeId,
        index: u8,
        direction: PadDir,
    },
    PadCountMismatch {
        node: NodeId,
        index: u8,
        direction: PadDir,
    },
    OrphanNode(NodeId),
    Cycle {
        nodes: Vec<NodeId>,
    },
    DuplicateGhostPad {
        node: NodeId,
        index: u8,
        direction: PadDir,
    },
    DegenerateFanNode(NodeId),
}

Validation failures from Graph::link and Graph::finish.

Variants

UnknownNode(NodeId)

A linked pad referenced a node id that doesn’t exist.

PadOutOfRange

A pad index is past the node kind’s pad count for that direction.

Fields

node: NodeId

index: u8

direction: PadDir

UnlinkedPad

A pad has no link where the kind requires one.

Fields

node: NodeId

index: u8

direction: PadDir

PadCountMismatch

A pad has more than one link (a pad peers with exactly one other pad; fan-out/in is expressed with Tee/Muxer, not multi-linked pads).

Fields

node: NodeId

index: u8

direction: PadDir

OrphanNode(NodeId)

A node participates in no link at all.

Cycle

The graph has a cycle; the listed nodes are the unresolved set.

Fields

nodes: Vec<NodeId>

DuplicateGhostPad

The same interior pad was exposed as a ghost pad twice on a Bin. A ghost pad peers 1:1 with one internal pad (as in GStreamer), so a pad can back at most one ghost.

Fields

node: NodeId

index: u8

direction: PadDir

DegenerateFanNode(NodeId)

A Tee/Demux with zero outputs or a Muxer with zero inputs. The runner’s broadcast computes senders.len() - 1, so a zero-fan node underflows and panics; reject it at validation instead.

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 Eq for GraphError

impl From<GraphError> for DecodebinError

fn from(e: GraphError) -> Self

Converts to this type from the input type.

impl From<GraphError> for PlaybinGraphError

fn from(e: GraphError) -> Self

Converts to this type from the input type.

impl From<GraphError> for AutoplugError

fn from(e: GraphError) -> Self

Converts to this type from the input type.

impl From<GraphError> for ParseError

fn from(e: GraphError) -> 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