Subversion-Projekte lars-tiefland.laravel_shop

<?php declare(strict_types=1);

namespace PhpParser\Parser;

use PhpParser\Error;

use PhpParser\ErrorHandler;

use PhpParser\Parser;

class Multiple implements Parser

{

    /** @var Parser[] List of parsers to try, in order of preference */

    private $parsers;

    /**

     * Create a parser which will try multiple parsers in an order of preference.

     *

     * Parsers will be invoked in the order they're provided to the constructor. If one of the

     * parsers runs without throwing, it's output is returned. Otherwise the exception that the

     * first parser generated is thrown.

     *

     * @param Parser[] $parsers

     */

    public function __construct(array $parsers) {

        $this->parsers = $parsers;

    }

    public function parse(string $code, ErrorHandler $errorHandler = null) {

        if (null === $errorHandler) {

            $errorHandler = new ErrorHandler\Throwing;

        }

        list($firstStmts, $firstError) = $this->tryParse($this->parsers[0], $errorHandler, $code);

        if ($firstError === null) {

            return $firstStmts;

        }

        for ($i = 1, $c = count($this->parsers); $i < $c; ++$i) {

            list($stmts, $error) = $this->tryParse($this->parsers[$i], $errorHandler, $code);

            if ($error === null) {

                return $stmts;

            }

        }

        throw $firstError;

    }

    private function tryParse(Parser $parser, ErrorHandler $errorHandler, $code) {

        $stmts = null;

        $error = null;

        try {

            $stmts = $parser->parse($code, $errorHandler);

        } catch (Error $error) {}

        return [$stmts, $error];

    }

}