/**
* Clears/Resets a field by tag number
*
* @throws \Exception If trying to modify an unknown field
* @param int $tag
* @return \DrSlump\Protobuf\Message - Fluent interface
*/
public function _clear($tag)
{
$f = $this->_descriptor->getField($tag);
if (!$f) {
throw new \Exception('Unknown fields not supported');
}
$name = $f->getName();
if (!$f->isExtension()) {
$this->{$name} = $f->isRepeated() ? array() : NULL;
} else {
$this->_extensions[$name] = $f->isRepeated() ? array() : NULL;
}
return $this;
}
public function offsetUnset($offset)
{
if (is_numeric($offset)) {
$field = $this->_descriptor->getField($offset);
if (!$field) {
trigger_error("Protobuf message " . $this->_descriptor->getName() . " doesn't have any field with a tag number of {$offset}", E_USER_NOTICE);
return;
}
if ($field->isExtension()) {
$data =& $this->_extensions;
} else {
$data =& $this->_values;
}
if (isset($data[$field->name])) {
unset($data[$field->name]);
}
} else {
$this->clearExtension($offset);
}
}
