Struct petgraph::visit::Dfs

pub struct Dfs<N, VM> {
    pub stack: Vec<N>,
    pub discovered: VM,
}

A depth first search (DFS) of a graph.

Using a Dfs you can run a traversal over a graph while still retaining mutable access to it, if you use it like the following example:

use petgraph::{Graph, Dfs};

let mut graph = Graph::<_,()>::new();
let a = graph.add_node(0);

let mut dfs = Dfs::new(&graph, a);
while let Some(nx) = dfs.next(&graph) {
    // we can access `graph` mutably here still
    graph[nx] += 1;
}

assert_eq!(graph[a], 1);

Note: The algorithm may not behave correctly if nodes are removed during iteration. It may not necessarily visit added nodes or edges.

Fields

stack
discovered

Methods

impl<G: Visitable> Dfs<G, G>

fn new(graph: &G, start: G) -> Self

Create a new Dfs, using the graph's visitor map, and put start in the stack of nodes to visit.

fn empty(graph: &G) -> Self

Create a new Dfs using the graph's visitor map, and no stack.

impl<N, VM> Dfs<N, VM> where N: Clone, VM: VisitMap<N>

fn move_to(&mut self, start: N)

Keep the discovered map, but clear the visit stack and restart the dfs from a particular node.

impl<N, VM> Dfs<N, VM> where N: Clone, VM: VisitMap<N>

fn next<'a, G>(&mut self, graph: &'a G) -> Option<N> where G: Graphlike<NodeId=N>, G: for<'b> NeighborIter<'b>

Return the next node in the dfs, or None if the traversal is done.

Trait Implementations

Derived Implementations

impl<N: Debug, VM: Debug> Debug for Dfs<N, VM> where N: Debug, VM: Debug

fn fmt(&self, __arg_0: &mut Formatter) -> Result

impl<N: Clone, VM: Clone> Clone for Dfs<N, VM> where N: Clone, VM: Clone

fn clone(&self) -> Dfs<N, VM>

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