NAME

Forest::Tree - An n-ary tree

SYNOPSIS

  use Forest::Tree;

  my $t = Forest::Tree->new(
      node     => 1,
      children => [
          Forest::Tree->new(
              node     => 1.1,
              children => [
                  Forest::Tree->new(node => 1.1.1),
                  Forest::Tree->new(node => 1.1.2),
                  Forest::Tree->new(node => 1.1.3),
              ]
          ),
          Forest::Tree->new(node => 1.2),
          Forest::Tree->new(
              node     => 1.3,
              children => [
                  Forest::Tree->new(node => 1.3.1),
                  Forest::Tree->new(node => 1.3.2),
              ]
          ),
      ]
  );

  $t->traverse(sub {
      my $t = shift;
      print(('    ' x $t->depth) . ($t->node || '\undef') . "\n");
  });

DESCRIPTION

This module is a basic n-ary tree, it provides most of the functionality of Tree::Simple, whatever is missing will be added eventually.

This class inherits from Forest::Tree::Pure>, but all shared methods and attributes are documented in both classes.

ATTRIBUTES

node

uid

parent

parent

_set_parent

has_parent

clear_parent

children

get_child_at ($index)

Return the child at this position. (zero-base index)

child_count

Returns the number of children this tree has

size

size

has_size

clear_size

height

height

has_height

clear_height

METHODS

is_root

True if the current tree has no parent

is_leaf

True if the current tree has no children

depth

Return the depth of this tree. Root has a depth of -1

add_child ($child)

add_children (@children)

Add a new child. The $child must be a Forest::Tree

insert_child_at ($index, $child)

Insert a child at this position. (zero-base index)

remove_child_at ($index)

Remove the child at this position. (zero-base index)

traverse (\&func)

Takes a reference to a subroutine and traverses the tree applying this subroutine to every descendant.

siblings

Returns an array reference of all siblings (not including us)

to_pure_tree

Invokes reconstruct_with_class with Forest::Tree::Pure.

to_mutable_tree

Returns the invocant (without cloning).

clone

See "clone" in Forest::Tree::Pure.

This variant will not clone the parent, but return a clone of the subtree that is detached.

get_index_in_siblings

Returns the index of the tree in the list of children.

Equivalent to calling $tree-parent->get_child_index($tree)>.

Returns -1 if the node has no parent (the root node).

BUGS

All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT.

AUTHOR

Stevan Little <stevan.little@iinteractive.com>

COPYRIGHT AND LICENSE

Copyright 2008-2014 Infinity Interactive, Inc.

http://www.iinteractive.com

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.