VersionComparisonOperator.php
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VersionComparisonOperator.php
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	<?php declare(strict_types=1);
	/*
	* This file is part of PHPUnit.
	*
	* (c) Sebastian Bergmann <sebastian@phpunit.de>
	*
	* For the full copyright and license information, please view the LICENSE
	* file that was distributed with this source code.
	*/
	namespace PHPUnit\Util;

	use function in_array;
	use function sprintf;

	/**
	* @internal This class is not covered by the backward compatibility promise for PHPUnit
	*
	* @psalm-immutable
	*/
	final class VersionComparisonOperator
	{
	/**
	* @psalm-var '<'\|'lt'\|'<='\|'le'\|'>'\|'gt'\|'>='\|'ge'\|'=='\|'='\|'eq'\|'!='\|'<>'\|'ne'
	*/
	private $operator;

	public function __construct(string $operator)
	{
	$this->ensureOperatorIsValid($operator);

	$this->operator = $operator;
	}

	/**
	* @return '!='\|'<'\|'<='\|'<>'\|'='\|'=='\|'>'\|'>='\|'eq'\|'ge'\|'gt'\|'le'\|'lt'\|'ne'
	*/
	public function asString(): string
	{
	return $this->operator;
	}

	/**
	* @throws Exception
	*
	* @psalm-assert '<'\|'lt'\|'<='\|'le'\|'>'\|'gt'\|'>='\|'ge'\|'=='\|'='\|'eq'\|'!='\|'<>'\|'ne' $operator
	*/
	private function ensureOperatorIsValid(string $operator): void
	{
	if (!in_array($operator, ['<', 'lt', '<=', 'le', '>', 'gt', '>=', 'ge', '==', '=', 'eq', '!=', '<>', 'ne'], true)) {
	throw new Exception(
	sprintf(
	'"%s" is not a valid version_compare() operator',
	$operator,
	),
	);
	}
	}
	}