I seem to remember phobos has an interval type so you can specify:
  Interval!("(]", 0, 10) myvalue;
  Interval!("(0,10]") myvalue; // or perhaps like this..
and get
  enforce(value > 0 && value <= 10);
added automatically.

I'm unable to find it though.. Is my memory playing tricks on me?

simendsjo:

> Is my memory playing tricks on me?

Right, I think.

Bye,
bearophile