Enum EventNoPred

pub enum EventNoPred {
    Init {
        root: usize,
    },
    Previsit {
        node: usize,
        root: usize,
        depth: usize,
    },
    Revisit {
        node: usize,
        root: usize,
        depth: usize,
    },
    Done {
        root: usize,
    },
}

Types of callback events generated during depth-first visits not keeping track of parent nodes.

Variants

Init

This event should be used to set up state at the start of the visit.

Note that this event will not happen if the visit is empty, that is, all of the roots are already visited or filtered.

Fields

root: usize

The root of the current visit tree, that is, the first node that will be visited.

Previsit

The node has been encountered for the first time: we are traversing a new tree arc, unless all fields are equal to the root.

Fields

node: usize

The current node.

root: usize

The root of the current visit tree.

depth: usize

The depth of the visit, that is, the length of the visit path from the root to node.

Revisit

The node has been encountered before: we are traversing a back arc, a forward arc, or a cross arc.

Fields

node: usize

The current node.

root: usize

The root of the current visit tree.

depth: usize

The depth of the visit, that is, the length of the visit path from the root to node.

Done

The visit has been completed.

Note that this event will not happen if the visit is empty (that is, if the root has already been visited) or if the visit is stopped by a callback returning an error.

Fields

root: usize

The root of the current visit tree.

Trait Implementations

impl Clone for EventNoPred

fn clone(&self) -> EventNoPred

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventNoPred

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

Formats the value using the given formatter.

impl Event for EventNoPred

type FilterArgs = FilterArgsNoPred

The type passed as input to the filter.

impl Hash for EventNoPred

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for EventNoPred

fn eq(&self, other: &EventNoPred) -> 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 Eq for EventNoPred

impl StructuralPartialEq for EventNoPred