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<?php
declare(strict_types=1);
namespace Doctrine\ORM\Query;
use function str_repeat;
/**
* A parse tree printer for Doctrine Query Language parser.
*
* @link http://www.phpdoctrine.org
*/
class Printer
{
/** Current indentation level */
protected int $indent = 0;
/**
* Constructs a new parse tree printer.
*
* @param bool $silent Parse tree will not be printed if true.
*/
public function __construct(protected bool $silent = false)
{
}
/**
* Prints an opening parenthesis followed by production name and increases
* indentation level by one.
*
* This method is called before executing a production.
*
* @param string $name Production name.
*/
public function startProduction(string $name): void
{
$this->println('(' . $name);
$this->indent++;
}
/**
* Decreases indentation level by one and prints a closing parenthesis.
*
* This method is called after executing a production.
*/
public function endProduction(): void
{
$this->indent--;
$this->println(')');
}
/**
* Prints text indented with spaces depending on current indentation level.
*
* @param string $str The text.
*/
public function println(string $str): void
{
if (! $this->silent) {
echo str_repeat(' ', $this->indent), $str, "\n";
}
}
}
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