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<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhp\ScssPhp\Ast\Css;
/**
* A modifiable version of {@see CssParentNode} for use in the evaluation step.
*
* @internal
*/
abstract class ModifiableCssParentNode extends ModifiableCssNode implements CssParentNode
{
/**
* @var list<ModifiableCssNode>
*/
private $children;
/**
* @param list<ModifiableCssNode> $children
*/
public function __construct(array $children = [])
{
$this->children = $children;
}
/**
* @return list<ModifiableCssNode>
*/
public function getChildren(): array
{
return $this->children;
}
public function isChildless(): bool
{
return false;
}
/**
* Returns a copy of $this with an empty {@see children} list.
*
* This is *not* a deep copy. If other parts of this node are modifiable,
* they are shared between the new and old nodes.
*/
abstract public function copyWithoutChildren(): ModifiableCssParentNode;
public function addChild(ModifiableCssNode $child): void
{
$child->setParent($this, \count($this->children));
$this->children[] = $child;
}
/**
* @internal
*/
public function removeChildAt(int $index): void
{
array_splice($this->children, $index, 1);
}
}
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