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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 Closure; use ReflectionFunction; /** * @template CallbackInput of mixed * * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit */ final class Callback extends Constraint { /** * @var callable(CallbackInput): bool */ private readonly mixed $callback; /** * @param callable(CallbackInput $input): bool $callback */ public function __construct(callable $callback) { $this->callback = $callback; } /** * Returns a string representation of the constraint. */ public function toString(): string { return 'is accepted by specified callback'; } public function isVariadic(): bool { foreach ((new ReflectionFunction(Closure::fromCallable($this->callback)))->getParameters() as $parameter) { if ($parameter->isVariadic()) { return true; } } return false; } /** * Evaluates the constraint for parameter $value. Returns true if the * constraint is met, false otherwise. * * @param CallbackInput $other */ protected function matches(mixed $other): bool { if ($this->isVariadic()) { return ($this->callback)(...$other); } return ($this->callback)($other); } }
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