Source Reference:

• Component: bbPress :: bbp-user

  File: /bbp-includes/bbp-user-template.php :: Trac Source Line: 1145

  	// Forum is private, and user can see it
  	elseif ( bbp_is_forum_private( $forum_id, $check_ancestors ) && current_user_can( 'read_private_forums' ) )
  		$retval = true;
  
  	// Forum is hidden, and user can see it
  	elseif ( bbp_is_forum_hidden ( $forum_id, $check_ancestors ) && current_user_can( 'read_hidden_forums'  ) )
  		$retval = true;
  
  	return apply_filters( 'bbp_user_can_view_forum', $retval, $forum_id, $user_id );
  }
  
  /**
   * Check if the current user can publish topics
   *
   * @since bbPress (r3127)
   *
   * @uses is_super_admin()
   * @uses is_user_logged_in()
   * @uses bbp_allow_anonymous()