public function __construct($tag, $data = null, $line = null, $offset = null)
{
$tag = (string) $tag;
if ($tag === '') {
throw new exceptions\logic('Tag must not be an empty string');
}
if ($line !== null) {
$line = (int) $line;
if ($line <= 0) {
throw new exceptions\logic('Line must be greater than 0');
}
}
if ($offset !== null) {
$offset = (int) $offset;
if ($offset <= 0) {
throw new exceptions\logic('Offset must be greater than 0');
}
}
parent::__construct($data);
$this->tag = $tag;
$this->line = $line;
$this->offset = $offset;
}
