home/alospiesjs/www/apis/youtube/vendor/phpoption/phpoption/src/PhpOption/None.php000060400000004722151163611630024604 0ustar00 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ namespace PhpOption; use EmptyIterator; /** * @extends Option */ final class None extends Option { /** @var None|null */ private static $instance; /** * @return None */ public static function create(): self { if (null === self::$instance) { self::$instance = new self(); } return self::$instance; } public function get() { throw new \RuntimeException('None has no value.'); } public function getOrCall($callable) { return $callable(); } public function getOrElse($default) { return $default; } public function getOrThrow(\Exception $ex) { throw $ex; } public function isEmpty(): bool { return true; } public function isDefined(): bool { return false; } public function orElse(Option $else) { return $else; } public function ifDefined($callable) { // Just do nothing in that case. } public function forAll($callable) { return $this; } public function map($callable) { return $this; } public function flatMap($callable) { return $this; } public function filter($callable) { return $this; } public function filterNot($callable) { return $this; } public function select($value) { return $this; } public function reject($value) { return $this; } public function getIterator(): EmptyIterator { return new EmptyIterator(); } public function foldLeft($initialValue, $callable) { return $initialValue; } public function foldRight($initialValue, $callable) { return $initialValue; } private function __construct() { } }