NAME

       Pod::Elemental::Transformer::Nester - group the document into sections

VERSION

       version 0.103000

OVERVIEW

       The Nester transformer is meant to find potential container elements and make them into
       actual containers.  It works by being told what elements may be made into containers and
       what subsequent elements they should allow to be stuffed into them.

       For example, given the following nester:

         use Pod::Elemental::Selectors qw(s_command s_flat);

         my $nester = Pod::Elemental::Transformer::Nester->new({
           top_selector      => s_command('head1'),
           content_selectors => [
             s_command([ qw(head2 head3 head4) ]),
             s_flat,
           ],
         });

       ..then when we apply the transformation:

         $nester->transform_node($document);

       ...the nester will find all "=head1" elements in the top-level of the document.  It will
       ensure that they are represented by objects that perform the Pod::Elemental::Node role,
       and then it will move all subsequent elements matching the "content_selectors" into the
       container.

       So, if we start with this input:

         =head1 Header
         =head2 Subheader
         Pod5::Ordinary <some content>
         =head1 New Header

       The nester will convert its structure to look like this:

         =head1 Header
           =head2 Subheader
           Pod5::Ordinary <some content>
         =head1 New Header

       Once an element is reached that does not pass the content selectors, the nesting ceases
       until the next potential container.

ATTRIBUTES

   top_selector
       This attribute must be a coderef (presumably made from Pod::Elemental::Selectors) that
       will test elements in the transformed node and return true if the element is a potential
       new container.

   content_selectors
       This attribute must be an arrayref of coderefs (again presumably made from
       Pod::Elemental::Selectors) that will test whether paragraphs subsequent to the top-level
       container may be moved under the container.

AUTHOR

       Ricardo SIGNES <rjbs@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2014 by Ricardo SIGNES.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.