NAME

Graph::Traversal - graph traversal

SYNOPSIS

use Graph::Traversal;

DESCRIPTION

$s = Graph::Traversal->new($G, %param)

Returns a new graph search object for the graph $G and the parameters %param.

Usually not used directly but instead via frontends like Graph::DFS for depth-first searching and Graph::BFS for breadth-first searching:

$dfs = Graph::DFS->new($G, %param)
$bfs = Graph::BFS->new($G, %param)

%param documentation to be written

$S->reset

Resets a graph search object $S to its initial state.

$v = $s->next_preorder

Returns the next vertex in preorder of the graph encapsulated within the search object $s.

next_postorder

$v = $S->next_postorder

Returns the next vertex in postorder of the graph encapsulated within the search object $S.

($u, $v) = $s->next_edge

Returns the vertices of the next edge of the graph encapsulated within the search object $s.

@V = $S->preorder

Returns all the vertices in preorder of the graph encapsulated within the search object $S.

@V = $S->postorder

Returns all the vertices in postorder of the graph encapsulated within the search object $S.

@V = $S->edges

Returns all the edges of the graph encapsulated within the search object $S.

@R = $S->roots

Returns all the root vertices of the trees of the graph encapsulated within the search object $S. "The root vertices" is ambiguous: what really happens is that either the roots from the previous search made on the $s are returned; or a preorder search is done and the roots of this search are returned.

%R = $S->vertex_roots

Returns as a hash of ($vertex, $root) pairs all the vertices and the root vertices of their search trees of the graph encapsulated within the search object $S. "The root vertices" is ambiguous; see the documentation of the roots() method for more details.

COPYRIGHT

Copyright 1999, O'Reilly & Associates.

This code is distributed under the same copyright terms as Perl itself.