vendor/symfony/options-resolver/OptionsResolver.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\OptionsResolver;

use Symfony\Component\OptionsResolver\Exception\AccessException;
use Symfony\Component\OptionsResolver\Exception\InvalidOptionsException;
use Symfony\Component\OptionsResolver\Exception\MissingOptionsException;
use Symfony\Component\OptionsResolver\Exception\NoSuchOptionException;
use Symfony\Component\OptionsResolver\Exception\OptionDefinitionException;
use Symfony\Component\OptionsResolver\Exception\UndefinedOptionsException;

/**
 * Validates options and merges them with default values.
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 * @author Tobias Schultze <http://tobion.de>
 */
class OptionsResolver implements Options, OptionsResolverInterface
{
    /**
     * The fully qualified name of the {@link Options} interface.
     *
     * @internal
     */
    const OPTIONS_INTERFACE = 'Symfony\\Component\\OptionsResolver\\Options';

    /**
     * The names of all defined options.
     */
    private $defined = array();

    /**
     * The default option values.
     */
    private $defaults = array();

    /**
     * The names of required options.
     */
    private $required = array();

    /**
     * The resolved option values.
     */
    private $resolved = array();

    /**
     * A list of normalizer closures.
     *
     * @var \Closure[]
     */