I'm trying to make use of the bit flags documented at Text::Markdown::Hoedown. I've got the following function, which works, except for the extensions value. I don't know what I'm doing there.

package Dancer2::Plugin::MarkdownFilesToHTML::MarkdownParser ;

use strict;
use warnings;
use parent qw(Exporter);

our @EXPORT = qw( markdown );

use XSLoader;
XSLoader::load('Text::Markdown::Hoedown', '1.02');

sub markdown {
    my $str = shift;
    my %args = (
        html_options    => 0,
        extensions      => '| HOEDOWN_EXT_FENCED_CODE',
        max_nesting     => 16,
        toc_nesting_lvl => 99,
        @_,
    );

    my $renderer = Text::Markdown::Hoedown::Renderer::HTML->new(
        $args{html_options},
        $args{toc_nesting_lvl},
    );
    my $md = Text::Markdown::Hoedown::Markdown->new(
        $args{extensions},
        $args{max_nesting},
        $renderer
    );
    return $md->render($str);
}
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