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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\Config\Definition\Builder;
use Symfony\Component\Config\Definition\Exception\UnsetKeyException;
/**
 * This class builds an if expression.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 * @author Christophe Coevoet <stof@notk.org>
 */
class ExprBuilder
{
    protected $node;
    public $ifPart;
    public $thenPart;
    public function __construct(NodeDefinition $node)
    {
        $this->node = $node;
    }
    /**
     * Marks the expression as being always used.
     *
     * @return $this
     */
    public function always(\Closure $then = null)
    {
        $this->ifPart = function ($v) { return true; };
        if (null !== $then) {
            $this->thenPart = $then;
        }
        return $this;
    }
    /**
     * Sets a closure to use as tests.
     *
     * The default one tests if the value is true.
     *
     * @return $this
     */
    public function ifTrue(\Closure $closure = null)
    {
        if (null === $closure) {
            $closure = function ($v) { return true === $v; };
        }
        $this->ifPart = $closure;
        return $this;
    }
    /**
     * Tests if the value is a string.
     *
     * @return $this
     */
    public function ifString()
    {
        $this->ifPart = function ($v) { return \is_string($v); };
        return $this;
    }
    /**
     * Tests if the value is null.
     *
     * @return $this
     */
    public function ifNull()
    {
        $this->ifPart = function ($v) { return null === $v; };
        return $this;
    }
    /**
     * Tests if the value is empty.
     *
     * @return ExprBuilder
     */
    public function ifEmpty()
    {
        $this->ifPart = function ($v) { return empty($v); };
        return $this;
    }
    /**
     * Tests if the value is an array.
     *
     * @return $this
     */
    public function ifArray()
    {
        $this->ifPart = function ($v) { return \is_array($v); };
        return $this;
    }
    /**
     * Tests if the value is in an array.
     *
     * @return $this
     */
    public function ifInArray(array $array)
    {
        $this->ifPart = function ($v) use ($array) { return \in_array($v, $array, true); };
        return $this;
    }
    /**
     * Tests if the value is not in an array.
     *
     * @return $this
     */
    public function ifNotInArray(array $array)
    {
        $this->ifPart = function ($v) use ($array) { return !\in_array($v, $array, true); };
        return $this;
    }
    /**
     * Transforms variables of any type into an array.
     *
     * @return $this
     */
    public function castToArray()
    {
        $this->ifPart = function ($v) { return !\is_array($v); };
        $this->thenPart = function ($v) { return [$v]; };