3 * Class that defers a slow string generation until the string is actually needed.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
25 * @deprecated since 1.31, use Message::listParam() instead
27 class DeferredStringifier
{
28 /** @var callable Callback used for result string generation */
38 * @param callable $callback Callback that gets called by __toString
39 * @param mixed ...$params Parameters to the callback
41 public function __construct( $callback, ...$params ) {
42 $this->callback
= $callback;
43 $this->params
= $params;
47 * Get the string generated from the callback
51 public function __toString() {
52 if ( $this->result
=== null ) {
53 $this->result
= call_user_func_array( $this->callback
, $this->params
);