Enum VconnNei 

pub enum VconnNei {
    Error,
    Negative,
    NumberOfNodes,
    Ignore,
}

Behaviour when source and target are directly adjacent.

Mirrors igraph_vconn_nei_t from references/igraph/include/igraph_flow.h. A direct edge cannot be broken by removing internal vertices, so this enum picks how the library should report that case.

Variants

Error

Return an IgraphError::InvalidArgument when a direct edge exists. Matches igraph C IGRAPH_VCONN_NEI_ERROR.

Negative

Return -1 when a direct edge exists. Matches igraph C IGRAPH_VCONN_NEI_NEGATIVE.

NumberOfNodes

Return vcount() (which is ≥ s-t vertex connectivity trivially) when a direct edge exists. Matches igraph C IGRAPH_VCONN_NEI_NUMBER_OF_NODES.

Ignore

Continue with the max-flow calculation, subtracting one path for every parallel direct arc so the result is the number of internally vertex-disjoint paths excluding the direct ones. Matches igraph C IGRAPH_VCONN_NEI_IGNORE.

Trait Implementations

impl Clone for VconnNei

fn clone(&self) -> VconnNei

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VconnNei

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

Formats the value using the given formatter.

impl PartialEq for VconnNei

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for VconnNei

impl Eq for VconnNei

impl StructuralPartialEq for VconnNei