BreadthFirst implements stateful breadth-first graph traversal.
type BreadthFirst struct {
EdgeFilter func(graph.Edge) bool
Visit func(u, v graph.Node)
// contains filtered or unexported fields
}
func (b *BreadthFirst) Reset()
Reset resets the state of the traverser for reuse.
func (b *BreadthFirst) Visited(n graph.Node) bool
Visited returned whether the node n was visited during a traverse.
func (b *BreadthFirst) Walk(g graph.Graph, from graph.Node, until func(n graph.Node, d int) bool) graph.Node
Walk performs a breadth-first traversal of the graph g starting from the given node, depending on the EdgeFilter field and the until parameter if they are non-nil. The traversal follows edges for which EdgeFilter(edge) is true and returns the first node for which until(node, depth) is true. During the traversal, if the Visit field is non-nil, it is called with the nodes joined by each followed edge.
func (b *BreadthFirst) WalkAll(g graph.Undirected, before, after func(), during func(graph.Node))
WalkAll calls Walk for each unvisited node of the graph g using edges independent of their direction. The functions before and after are called prior to commencing and after completing each walk if they are non-nil respectively. The function during is called on each node as it is traversed.
DepthFirst implements stateful depth-first graph traversal.
type DepthFirst struct {
EdgeFilter func(graph.Edge) bool
Visit func(u, v graph.Node)
// contains filtered or unexported fields
}
func (d *DepthFirst) Reset()
Reset resets the state of the traverser for reuse.
func (d *DepthFirst) Visited(n graph.Node) bool
Visited returned whether the node n was visited during a traverse.
func (d *DepthFirst) Walk(g graph.Graph, from graph.Node, until func(graph.Node) bool) graph.Node
Walk performs a depth-first traversal of the graph g starting from the given node, depending on the EdgeFilter field and the until parameter if they are non-nil. The traversal follows edges for which EdgeFilter(edge) is true and returns the first node for which until(node) is true. During the traversal, if the Visit field is non-nil, it is called with the nodes joined by each followed edge.
func (d *DepthFirst) WalkAll(g graph.Undirected, before, after func(), during func(graph.Node))
WalkAll calls Walk for each unvisited node of the graph g using edges independent of their direction. The functions before and after are called prior to commencing and after completing each walk if they are non-nil respectively. The function during is called on each node as it is traversed.
VisitableGraph
type VisitableGraph interface {
graph.Graph
// VisitFrom invokes visitor with all nodes that can be reached directly from the given node.
// If visitor returns false, visiting is short-circuited.
VisitFrom(from graph.Node, visitor func(graph.Node) (shouldContinue bool))
}
VisitingDepthFirst implements stateful depth-first graph traversal on a visitable graph.
type VisitingDepthFirst struct {
EdgeFilter func(graph.Edge) bool
Visit func(u, v graph.Node)
// contains filtered or unexported fields
}
func (d *VisitingDepthFirst) Reset()
Reset resets the state of the traverser for reuse.
func (d *VisitingDepthFirst) Visited(n graph.Node) bool
Visited returned whether the node n was visited during a traverse.
func (d *VisitingDepthFirst) Walk(g VisitableGraph, from graph.Node, until func(graph.Node) bool) graph.Node
Walk performs a depth-first traversal of the graph g starting from the given node, depending on the EdgeFilter field and the until parameter if they are non-nil. The traversal follows edges for which EdgeFilter(edge) is true and returns the first node for which until(node) is true. During the traversal, if the Visit field is non-nil, it is called with the nodes joined by each followed edge.