What does 'scope' mean for non-class types?

[bearophile]

Lars T. Kyllingstad:
> So in the context of function arguments, 'in' is just a synonym for 
> 'const'?  It seems to me like it should be removed from the language, 
> then.

http://d.puremagic.com/issues/show_bug.cgi?id=3943.

Bye,
bearophile