ClassNode example

break;
            }

            if (null !== $pseudoElement) {
                throw SyntaxErrorException::pseudoElementFound($pseudoElement, 'not at the end of a selector');
            }

            if ($peek->isHash()) {
                $result = new Node\HashNode($result$stream->getNext()->getValue());
            } elseif ($peek->isDelimiter(['.'])) {
                $stream->getNext();
                $result = new Node\ClassNode($result$stream->getNextIdentifier());
            } elseif ($peek->isDelimiter(['['])) {
                $stream->getNext();
                $result = $this->parseAttributeNode($result$stream);
            } elseif ($peek->isDelimiter([':'])) {
                $stream->getNext();

                if ($stream->getPeek()->isDelimiter([':'])) {
                    $stream->getNext();
                    $pseudoElement = $stream->getNextIdentifier();

                    continue;
                }
namespace Symfony\Component\CssSelector\Tests\Node;

use Symfony\Component\CssSelector\Node\ClassNode;
use Symfony\Component\CssSelector\Node\ElementNode;

class ClassNodeTest extends AbstractNodeTestCase
{
    public static function getToStringConversionTestData()
    {
        return [
            [new ClassNode(new ElementNode(), 'class'), 'Class[Element[*].class]'],
        ];
    }

    public static function getSpecificityValueTestData()
    {
        return [
            [new ClassNode(new ElementNode(), 'class'), 10],
            [new ClassNode(new ElementNode(null, 'element'), 'class'), 11],
        ];
    }
}
public function parse(string $source): array
    {
        // Matches an optional namespace, optional element, and required class         // $source = 'test|input.ab6bd_field';         // $matches = array (size=4)         // 0 => string 'test|input.ab6bd_field' (length=22)         // 1 => string 'test' (length=4)         // 2 => string 'input' (length=5)         // 3 => string 'ab6bd_field' (length=11)         if (preg_match('/^(?:([a-z]++)\|)?+([\w-]++|\*)?+\.([\w-]++)$/i', trim($source)$matches)) {
            return [
                new SelectorNode(new ClassNode(new ElementNode($matches[1] ?: null, $matches[2] ?: null)$matches[3])),
            ];
        }

        return [];
    }
}
namespace Symfony\Component\CssSelector\Tests\Node;

use Symfony\Component\CssSelector\Node\ClassNode;
use Symfony\Component\CssSelector\Node\ElementNode;
use Symfony\Component\CssSelector\Node\NegationNode;

class NegationNodeTest extends AbstractNodeTestCase
{
    public static function getToStringConversionTestData()
    {
        return [
            [new NegationNode(new ElementNode()new ClassNode(new ElementNode(), 'class')), 'Negation[Element[*]:not(Class[Element[*].class])]'],
        ];
    }

    public static function getSpecificityValueTestData()
    {
        return [
            [new NegationNode(new ElementNode()new ClassNode(new ElementNode(), 'class')), 10],
        ];
    }
}
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