How to have strongly typed numerical values?

[bearophile]

Nicholas Londey:

> for example degrees west and kilograms such that they cannot be 
> accidentally mixed in an expression.

Using the static typing to avoid similar bugs is the smart thing 
to do :-)


  I have vague recollection of seeing a presentation
> by Walter talking about this but I cannot seem to find it. I 
> have looked at std.typecons.Typedef and Proxy but neither seem 
> to do what I want or at least fail to compile for the 
> expression n =  n + n;.

std.typecons.Typedef is kind of broken.


> but assume there is a standard implementation which I would 
> prefer.

I think Phobos doesn't have a standard implementation.

Bye,
bearophile