55 lines
1.2 KiB
PHP
55 lines
1.2 KiB
PHP
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<?php
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/**
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* This file is part of the Peast package
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*
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* (c) Marco Marchiò <marco.mm89@gmail.com>
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*
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* For the full copyright and license information refer to the LICENSE file
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* distributed with this source code
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*/
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namespace Peast\Syntax\Node;
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/**
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* A node that represents a chain element.
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*
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* @author Marco Marchiò <marco.mm89@gmail.com>
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*/
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abstract class ChainElement extends Node implements Expression
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{
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protected $propertiesMap = array(
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"optional" => false
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);
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/**
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* Optional flag that is true if the node is in the optional
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* part of a chain expression
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*
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* @var bool
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*/
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protected $optional = false;
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/**
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* Returns the optional flag that is true if the node is in
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* the optional part of a chain expression
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*
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* @return bool
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*/
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public function getOptional()
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{
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return $this->optional;
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}
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/**
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* Sets the optional flag that is true if the node is in
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* the optional part of a chain expression
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*
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* @param bool $optional Optional flag
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*
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* @return $this
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*/
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public function setOptional($optional)
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{
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$this->optional = (bool) $optional;
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return $this;
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}
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}
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