File vendor/nikic/php-parser/lib/PhpParser/Parser/Multiple.php

1:	<?php declare(strict_types=1);
2:
3:	namespace PhpParser\Parser;
4:
5:	use PhpParser\Error;
6:	use PhpParser\ErrorHandler;
7:	use PhpParser\Parser;
8:
9:	class Multiple implements Parser
10:	{
11:	/** @var Parser[] List of parsers to try, in order of preference */
12:	private $parsers;
13:
14:	/**
15:	* Create a parser which will try multiple parsers in an order of preference.
16:	*
17:	* Parsers will be invoked in the order they're provided to the constructor. If one of the
18:	* parsers runs without throwing, it's output is returned. Otherwise the exception that the
19:	* first parser generated is thrown.
20:	*
21:	* @param Parser[] $parsers
22:	*/
23:	public function __construct(array $parsers) {
24:	$this->parsers = $parsers;
25:	}
26:
27:	public function parse(string $code, ErrorHandler $errorHandler = null) {
28:	if (null === $errorHandler) {
29:	$errorHandler = new ErrorHandler\Throwing;
30:	}
31:
32:	list($firstStmts, $firstError) = $this->tryParse($this->parsers[0], $errorHandler, $code);
33:	if ($firstError === null) {
34:	return $firstStmts;
35:	}
36:
37:	for ($i = 1, $c = count($this->parsers); $i < $c; ++$i) {
38:	list($stmts, $error) = $this->tryParse($this->parsers[$i], $errorHandler, $code);
39:	if ($error === null) {
40:	return $stmts;
41:	}
42:	}
43:
44:	throw $firstError;
45:	}
46:
47:	private function tryParse(Parser $parser, ErrorHandler $errorHandler, $code) {
48:	$stmts = null;
49:	$error = null;
50:	try {
51:	$stmts = $parser->parse($code, $errorHandler);
52:	} catch (Error $error) {}
53:	return [$stmts, $error];
54:	}
55:	}
56: