PhpDocParserHelper.php

<?php

declare (strict_types=1);
namespace SlevomatCodingStandard\Helpers;

use PHPStan\PhpDocParser\Ast\Node;
use PHPStan\PhpDocParser\Ast\NodeTraverser;
use PHPStan\PhpDocParser\Ast\NodeVisitor\CloningVisitor;
use PHPStan\PhpDocParser\Lexer\Lexer;
use PHPStan\PhpDocParser\Parser\ConstExprParser;
use PHPStan\PhpDocParser\Parser\PhpDocParser;
use PHPStan\PhpDocParser\Parser\TypeParser;
use PHPStan\PhpDocParser\Printer\Printer;

/**
 * @internal
 */
class PhpDocParserHelper {
    public static function getLexer() : Lexer {
        static $lexer;
        if ($lexer === null) {
            $lexer = new Lexer(true);
        }
        return $lexer;
    }
    public static function getParser() : PhpDocParser {
        static $parser;
        if ($parser === null) {
            $usedAttributes = [
                'lines' => true,
                'indexes' => true,
            ];
            $constantExpressionParser = new ConstExprParser(true, true, $usedAttributes);
            $parser = new PhpDocParser(new TypeParser($constantExpressionParser, true, $usedAttributes), $constantExpressionParser, true, true, $usedAttributes, true, true);
        }
        return $parser;
    }
    public static function getPrinter() : Printer {
        static $printer;
        if ($printer === null) {
            $printer = new Printer();
        }
        return $printer;
    }
    
    /**
     * @template T of Node
     * @param T $node
     * @return T
     */
    public static function cloneNode(Node $node) : Node {
        static $cloningTraverser;
        if ($cloningTraverser === null) {
            $cloningTraverser = new NodeTraverser([
                new CloningVisitor(),
            ]);
        }
        [
            $cloneNode,
        ] = $cloningTraverser->traverse([
            $node,
        ]);
        return $cloneNode;
    }

}