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Linguistic Tree Constructor 3.0.1 (Default branch)
10-11-2008
Linguistic Tree Constructor is an application fordrawing linguistic syntax trees. Its main strengthis assisting in data production by quicklyanalyzing large amounts of text. "Generic" treesare supported, as well as RRG and X-Bar trees.Node-categories are user-definable, and additionaluser-definable labels can also be applied to eachnode. Publication-quality, high-resolution,horizontal trees can be drawn. The file format isbased on TIGER-XML.License: GNU General Public License (GPL)Changes:|
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Tree::Simple::Visitor::PreOrderTraversal(3pm) User Contributed Perl Documentation Tree::Simple::Visitor::PreOrderTraversal(3pm) NAME
Tree::Simple::Visitor::PreOrderTraversal - A Visitor for pre-order traversal a Tree::Simple hierarchy SYNOPSIS
use Tree::Simple::Visitor::PreOrderTraversal; # create an visitor my $visitor = Tree::Simple::Visitor::PreOrderTraversal->new(); # pass our visitor to the tree $tree->accept($visitor); # print our results print join ", " => $visitor->getResults(); # this will print this: # 1 1.1 1.1.1 1.2 2 2.1 3 3.1 # assuming your tree is like this: # 1 # 1.1 # 1.1.1 # 1.2 # 2 # 2.1 # 3 # 3.1 DESCRIPTION
Pre-order traversal is a depth-first traversal method in which the sub-tree's are processed after the parent. It is essentially a wrapper around the base Tree::Simple::Visitor class, and is a separate module here for completeness. (If you have a post-order, you should have a pre-order too). METHODS
new There are no arguments to the constructor the object will be in its default state. You can use the "setNodeFilter" method to customize its behavior. includeTrunk ($boolean) Based upon the value of $boolean, this will tell the visitor to include the trunk of the tree in the traversal as well. setNodeFilter ($filter_function) This method accepts a CODE reference as its $filter_function argument and throws an exception if it is not a code reference. This code reference is used to filter the tree nodes as they are collected. This can be used to customize output, or to gather specific information from a more complex tree node. The filter function should accept a single argument, which is the current Tree::Simple object. visit ($tree) This is the method that is used by Tree::Simple's "accept" method. It can also be used on its own, it requires the $tree argument to be a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise. getResults This method returns the accumulated results of the application of the node filter to the tree. BUGS
None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it. CODE COVERAGE
See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more inforamtion. SEE ALSO
These Visitor classes are all subclasses of Tree::Simple::Visitor, which can be found in the Tree::Simple module, you should refer to that module for more information. AUTHOR
stevan little, <stevan@iinteractive.com> COPYRIGHT AND LICENSE
Copyright 2004, 2005 by 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. perl v5.10.1 2010-02-18 Tree::Simple::Visitor::PreOrderTraversal(3pm)