bbPress::add_rewrite_rules()

    public static function add_rewrite_rules() {

        /** Setup *************************************************************/

        // Add rules to top or bottom?
        $priority           = 'top';

        // Single Slugs
        $forum_slug         = bbp_get_forum_slug();
        $topic_slug         = bbp_get_topic_slug();
        $reply_slug         = bbp_get_reply_slug();
        $ttag_slug          = bbp_get_topic_tag_tax_slug();

        // Archive Slugs
        $view_slug          = bbp_get_view_slug();
        $search_slug        = bbp_get_search_slug();
        $topic_archive_slug = bbp_get_topic_archive_slug();
        $reply_archive_slug = bbp_get_reply_archive_slug();

        // Tertiary Slugs
        $feed_slug          = 'feed';
        $edit_slug          = 'edit';
        $paged_slug         = bbp_get_paged_slug();

        // Unique rewrite ID's
        $feed_id            = 'feed';
        $edit_id            = bbp_get_edit_rewrite_id();
        $view_id            = bbp_get_view_rewrite_id();
        $paged_id           = bbp_get_paged_rewrite_id();
        $search_id          = bbp_get_search_rewrite_id();
        $user_id            = bbp_get_user_rewrite_id();
        $user_favs_id       = bbp_get_user_favorites_rewrite_id();
        $user_subs_id       = bbp_get_user_subscriptions_rewrite_id();
        $user_tops_id       = bbp_get_user_topics_rewrite_id();
        $user_reps_id       = bbp_get_user_replies_rewrite_id();

        // Rewrite rule matches used repeatedly below
        $root_rule    = '/([^/]+)/?$';
        $feed_rule    = '/([^/]+)/' . $feed_slug  . '/?$';
        $edit_rule    = '/([^/]+)/' . $edit_slug  . '/?$';
        $paged_rule   = '/([^/]+)/' . $paged_slug . '/?([0-9]{1,})/?$';

        // Search rules (without slug check)
        $search_root_rule  = '/?$';
        $search_paged_rule = '/' . $paged_slug . '/?([0-9]{1,})/?$';

        /** Add ***************************************************************/

        // Edit Forum|Topic|Reply|Topic-tag
        add_rewrite_rule( $forum_slug . $edit_rule, 'index.php?' . bbp_get_forum_post_type()  . '=$matches[1]&' . $edit_id . '=1', $priority );
        add_rewrite_rule( $topic_slug . $edit_rule, 'index.php?' . bbp_get_topic_post_type()  . '=$matches[1]&' . $edit_id . '=1', $priority );
        add_rewrite_rule( $reply_slug . $edit_rule, 'index.php?' . bbp_get_reply_post_type()  . '=$matches[1]&' . $edit_id . '=1', $priority );
        add_rewrite_rule( $ttag_slug  . $edit_rule, 'index.php?' . bbp_get_topic_tag_tax_id() . '=$matches[1]&' . $edit_id . '=1', $priority );

        // Topic-View Pagination|Feed|View
        add_rewrite_rule( $view_slug . $paged_rule, 'index.php?' . $view_id . '=$matches[1]&' . $paged_id . '=$matches[2]', $priority );
        add_rewrite_rule( $view_slug . $feed_rule,  'index.php?' . $view_id . '=$matches[1]&' . $feed_id  . '=$matches[2]', $priority );
        add_rewrite_rule( $view_slug . $root_rule,  'index.php?' . $view_id . '=$matches[1]',                               $priority );

        // Search All
        add_rewrite_rule( $search_slug . $search_paged_rule, 'index.php?' . $paged_id .'=$matches[1]', $priority );
        add_rewrite_rule( $search_slug . $search_root_rule,  'index.php?' . $search_id,                $priority );
    }