<?php /** @license MIT * Copyright 2017 J. King, Dustin Wilson et al. * See LICENSE and AUTHORS files for details */ declare(strict_types=1); namespace JKingWeb\Arsse\Context; class UnionContext extends RootContext implements \ArrayAccess, \Countable, \IteratorAggregate { protected $contexts = []; #[\ReturnTypeWillChange] public function offsetExists($offset) { return isset($this->contexts[$offset]); } #[\ReturnTypeWillChange] public function offsetGet($offset) { return $this->contexts[$offset] ?? null; } #[\ReturnTypeWillChange] public function offsetSet($offset, $value) { assert($value instanceof RootContext, new \Exception("Union contexts may only contain other non-exclusion contexts")); if (isset($offset)) { $this->contexts[$offset] = $value; } else { $this->contexts[] = $value; } } #[\ReturnTypeWillChange] public function offsetUnset($offset) { unset($this->contexts[$offset]); } public function count(): int { return count($this->contexts); } public function getIterator(): \Traversable { foreach ($this->contexts as $k => $c) { yield $k => $c; } } public function __construct(RootContext ...$context) { $this->contexts = $context; } }