pub trait VisitMap<N> {
    fn visit(&mut self, a: N) -> bool;
    fn is_visited(&self, a: &N) -> bool;
}Expand description
A mapping for storing the visited status for NodeId N.
Required methods
Mark a as visited.
Return true if this is the first visit, false otherwise.
fn is_visited(&self, a: &N) -> bool
fn is_visited(&self, a: &N) -> bool
Return whether a has been visited before.