NAME
    GraphViz::ISA - Graphing @ISA hierarchies at run-time

SYNOPSIS
      use GraphViz::ISA;
      my $p = Some::Class->new;

      my $g1 = GraphViz::ISA->new($p);
      print $g1->as_png;

      my $g2 = GraphViz::ISA->new('Some::Other::Module');
      print $g2->as_png;

DESCRIPTION
    This class constructs a graph showing the `@ISA' hierarchy (note: not
    object hierarchies) from a package name or a blessed scalar.

METHODS
    The following methods are defined by this class; all other method calls
    are passed to the underlying GraphViz object:

    new()
        This constructs the object itself and takes a parameter. The
        parameter can be either a package name or a scalar blessed into a
        package. It then calls `isatree()' and hands the result to
        `graph()'. Then it returns the newly constructed object.

    isatree()
        Takes a package name as a parameter and traverses the indicated
        package's `@ISA' recursively, constructing a hash of hashes. If a
        package's `@ISA' is empty, it has an empty hashref as the value in
        the tree.

    graph()
        Takes a tree previously constructed by `isatree()' and traverses it,
        creating nodes and edges as it goes along.

TODO
    test.pl
BUGS
    None known so far. If you find any bugs or oddities, please do inform
    the author.

AUTHOR
    Marcel Grünauer, <marcel@codewerk.com>

COPYRIGHT
    Copyright 2001 Marcel Grünauer. All rights reserved.

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

SEE ALSO
    perl(1), GraphViz(3pm).