-<?php
-/**
- * Class that defers a slow string generation until the string is actually needed.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- */
-
-/**
- * @since 1.25
- */
-class DeferredStringifier {
- /** @var callable Callback used for result string generation */
- private $callback;
- /** @var array */
- private $params;
- /** @var string */
- private $result;
-
- /**
- * @param callable $callback Callback that gets called by __toString
- * @param mixed $param,... Parameters to the callback
- */
- public function __construct( $callback /*...*/ ) {
- $this->params = func_get_args();
- array_shift( $this->params );
- $this->callback = $callback;
- }
-
- /**
- * Returns a string generated by callback
- *
- * @return string
- */
- public function __toString() {
- if ( $this->result === null ) {
- $this->result = call_user_func_array( $this->callback, $this->params );
- }
- return $this->result;
- }
-}