Trait GraphWalk 

pub trait GraphWalk<'a, N: Clone, E: Clone> {
    // Required methods
    fn nodes(&'a self) -> Nodes<'a, N>;
    fn edges(&'a self) -> Edges<'a, E>;
    fn source(&'a self, edge: &E) -> N;
    fn target(&'a self, edge: &E) -> N;
}

GraphWalk is an abstraction over a graph = (nodes,edges) made up of node handles N and edge handles E, where each E can be mapped to its source and target nodes.

The lifetime parameter 'a is exposed in this trait (rather than introduced as a generic parameter on each method declaration) so that a client impl can choose N and E that have substructure that is bound by the self lifetime 'a.

The nodes and edges method each return instantiations of Cow<[T]> to leave implementers the freedom to create entirely new vectors or to pass back slices into internally owned vectors.

Required Methods

fn nodes(&'a self) -> Nodes<'a, N>

Returns all the nodes in this graph.

fn edges(&'a self) -> Edges<'a, E>

Returns all of the edges in this graph.

fn source(&'a self, edge: &E) -> N

The source node for edge.

fn target(&'a self, edge: &E) -> N

The target node for edge.

Implementors