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<?php
declare(strict_types=1);
namespace LaravelFreelancerNL\FluentAQL\Expressions;
use LaravelFreelancerNL\FluentAQL\QueryBuilder;
/**
* AQL literal expression.
*/
class ConstantExpression extends LiteralExpression implements ExpressionInterface
{
* Compile expression output.
*
* @param QueryBuilder|null $queryBuilder
* @return string
public function compile(QueryBuilder $queryBuilder = null): string
return strtoupper((string) $this->expression);
}