There are use cases for testing or re-using flags from other programs where you actually want to copy flags from a flagset into a new one and not simply add it. There are lots of private fields that make this difficult/impossible with the existing API.
There are use cases for testing or re-using flags from other programs where you actually want to copy flags from a flagset into a new one and not simply add it. There are lots of private fields that make this difficult/impossible with the existing API.