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<?php declare(strict_types=1);
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/*
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 * This file is part of sebastian/code-unit.
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 *
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 * (c) Sebastian Bergmann <sebastian@phpunit.de>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace SebastianBergmann\CodeUnit;
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use Iterator;
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final class CodeUnitCollectionIterator implements Iterator
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{
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    /**
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     * @psalm-var list<CodeUnit>
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     */
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    private $codeUnits;
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    /**
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     * @var int
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     */
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    private $position = 0;
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    public function __construct(CodeUnitCollection $collection)
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    {
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        $this->codeUnits = $collection->asArray();
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    }
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    public function rewind(): void
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    {
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        $this->position = 0;
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    }
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    public function valid(): bool
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    {
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        return isset($this->codeUnits[$this->position]);
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    }
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    public function key(): int
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    {
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        return $this->position;
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    }
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    public function current(): CodeUnit
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    {
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        return $this->codeUnits[$this->position];
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    }
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    public function next(): void
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    {
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        $this->position++;
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    }
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}