Remove `operator++` and `operator--` for floating point representations? about mp-units HOT 4 CLOSED

I agree that ++ and -- do not have much sense for floating-point representations but those operations are defined for a floating-point number. So if the following works:

double length = 3;
++length; 

I think it should work as well for a safe type:

quantity<metre, double> length(3);
++length;   // should also work

Also it has benefits from a generic point of view:

Quantity foo(Quantity auto q)
{
  return ++q;
}

The user should not be forced to check what is the Rep there.

Basically, if we do not provide those operators users will have to use += 1 in a generic code which basically is the same wrong for a floating-point number and we probably do not want to ban it too ;-)

from mp-units.

I think generic programming is a fine argument for why these operator should be left.
Maybe we should add this to the paper in a section titled: Supported Operations and Representations?

from mp-units.

Sure, this a good idea. Do you volunteer to write one? ;-)

from mp-units.

More on this subject in #29

from mp-units.