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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\Framework\Constraint;
use function is_nan;
/**
* @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
*/
final class IsNan extends Constraint
{
/**
* Returns a string representation of the constraint.
*/
public function toString(): string
{
return 'is nan';
}
/**
* Evaluates the constraint for parameter $other. Returns true if the
* constraint is met, false otherwise.
*
* @param mixed $other value or object to evaluate
*/
protected function matches($other): bool
{
return is_nan($other);
}
}
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