Subversion-Projekte lars-tiefland.laravel_shop

<?php declare(strict_types=1);

namespace PhpParser\Lexer\TokenEmulator;

use PhpParser\Lexer\Emulative;

final class CoaleseEqualTokenEmulator extends TokenEmulator

{

    public function getPhpVersion(): string

    {

        return Emulative::PHP_7_4;

    }

    public function isEmulationNeeded(string $code): bool

    {

        return strpos($code, '??=') !== false;

    }

    public function emulate(string $code, array $tokens): array

    {

        // We need to manually iterate and manage a count because we'll change

        // the tokens array on the way

        $line = 1;

        for ($i = 0, $c = count($tokens); $i < $c; ++$i) {

            if (isset($tokens[$i + 1])) {

                if ($tokens[$i][0] === T_COALESCE && $tokens[$i + 1] === '=') {

                    array_splice($tokens, $i, 2, [

                        [\T_COALESCE_EQUAL, '??=', $line]

                    ]);

                    $c--;

                    continue;

                }

            }

            if (\is_array($tokens[$i])) {

                $line += substr_count($tokens[$i][1], "\n");

            }

        }

        return $tokens;

    }

    public function reverseEmulate(string $code, array $tokens): array

    {

        // ??= was not valid code previously, don't bother.

        return $tokens;

    }

}