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<?php declare(strict_types=1);
namespace PhpParser\Lexer\TokenEmulator;
use PhpParser\PhpVersion;
use PhpParser\Token;
class ExplicitOctalEmulator extends TokenEmulator {
public function getPhpVersion(): PhpVersion {
return PhpVersion::fromComponents(8, 1);
}
public function isEmulationNeeded(string $code): bool {
return strpos($code, '0o') !== false || strpos($code, '0O') !== false;
}
public function emulate(string $code, array $tokens): array {
for ($i = 0, $c = count($tokens); $i < $c; ++$i) {
$token = $tokens[$i];
if ($token->id == \T_LNUMBER && $token->text === '0' &&
isset($tokens[$i + 1]) && $tokens[$i + 1]->id == \T_STRING &&
preg_match('/[oO][0-7]+(?:_[0-7]+)*/', $tokens[$i + 1]->text)
) {
$tokenKind = $this->resolveIntegerOrFloatToken($tokens[$i + 1]->text);
array_splice($tokens, $i, 2, [
new Token($tokenKind, '0' . $tokens[$i + 1]->text, $token->line, $token->pos),
]);
$c--;
}
}
return $tokens;
}
private function resolveIntegerOrFloatToken(string $str): int {
$str = substr($str, 1);
$str = str_replace('_', '', $str);
$num = octdec($str);
return is_float($num) ? \T_DNUMBER : \T_LNUMBER;
}
public function reverseEmulate(string $code, array $tokens): array {
// Explicit octals were not legal code previously, don't bother.
return $tokens;
}
}
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