/**
* Returns a copy of this duration with the specified duration subtracted.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param duration Duration the duration to subtract, positive or negative, not null
* @return Duration a {@code Duration} based on this duration with the specified duration subtracted, not null
* @throws ArithmeticException if numeric overflow occurs
*/
public function minusAmount(Duration $duration)
{
$secsToSubtract = $duration->getSeconds();
$nanosToSubtract = $duration->getNano();
if ($secsToSubtract == Long::MIN_VALUE) {
return $this->_plus(Long::MAX_VALUE, -$nanosToSubtract)->_plus(1, 0);
}
return $this->_plus(-$secsToSubtract, -$nanosToSubtract);
}
