CGAL users discussion list

[Philipp Möller <>]

hugodelgado 
<>
 writes:

> Thanks again for the reply. I understand what you said, my problem is that
> i'm doing that translations inside the Point_Set_3 file and with that code i
> cannot have a valid iterator that will insert the points inside the same
> deque, the one from the Point_Set_3.
>
> So when i'm inside the point_set_3.h file i call std::transform(begin(),
> end(), std::back_inserter(others), toCentroid), being others a new
> std::vector i've created. But what i wanted was to do something like,
> std::transform(begin(), end(), std::back_inserter(*this), toCentroid), so i
> could insert the points on the same deque. 
>
> I understand that i must make a previous step before transform that could
> for example mark all the points for removal, so that after the transform i
> could delete them, cause what i need is to replace the initial points by the
> new translated points.

Would that solve your problem?

std::deque old;

{
  std::deque my;
  std::transform(old.begin(), old.end(), std::back_inserter(my), myFunc);
  std::swap(my, old);
}

Where old is the deque you want to replace. 

Alternatively and faster:
  std::transform(old.begin(), old.end(), old.begin(), myFunc);

This might be unsafe should anything in myFunc depend on
the old values.