Trait depends::Visitor

pub trait Visitor {
    type Hasher: Hasher;

    // Required methods
    fn visit<N>(&mut self, node: &N) -> bool
       where N: Identifiable;
    fn clear(&mut self);
    fn hasher(&self) -> Self::Hasher;

    // Provided methods
    fn touch<N>(&mut self, _node: &N, _operation: Option<&'static str>)
       where N: Identifiable { ... }
    fn notify_recalculated<N>(&mut self, _node: &N)
       where N: Identifiable { ... }
    fn touch_dependency_group(&mut self, _dep: &'static str) { ... }
    fn leave<N>(&mut self, _node: &N)
       where N: Identifiable { ... }
}

A collection passed in to a graph, tracking the identifiers of each nodes to avoid traversing

Required Associated Types

type Hasher: Hasher

Required Methods

fn visit<N>(&mut self, node: &N) -> boolwhere N: Identifiable,

Return true iff this node hasn’t been visited yet.

fn clear(&mut self)

Clear the internal collection, prompting this visitor to revisit all nodes on the next traversal.

fn hasher(&self) -> Self::Hasher

Provided Methods

fn touch<N>(&mut self, _node: &N, _operation: Option<&'static str>)where N: Identifiable,

Touch the node. Useful for building graph visualisations.

fn notify_recalculated<N>(&mut self, _node: &N)where N: Identifiable,

For diagnostics, notify that a node has been recalculated.

fn touch_dependency_group(&mut self, _dep: &'static str)

Touch a dependency group type. Useful for building graph visualisations.

fn leave<N>(&mut self, _node: &N)where N: Identifiable,

Undo a touch. Useful for building graph visualisations.

Implementations on Foreign Types

impl Visitor for HashSet<usize>

Available on crate feature hashbrown only.

type Hasher = AHasher

fn visit<N>(&mut self, node: &N) -> boolwhere N: Identifiable,

fn clear(&mut self)

fn hasher(&self) -> Self::Hasher

Implementors

impl Visitor for GraphvizVisitor

Available on crate feature graphviz only.

type Hasher = DefaultHasher

impl Visitor for HashSetVisitor

type Hasher = DefaultHasher