What is the difference? (D2)

[torhu]

Dave B. wrote:
> Using them as parameter modifiers in functions, what is the difference 
> between "in", "const" and "final"?
> 
> e.g.
> 
> void func(final int i)
> {...}
> 
> vs
> 
> void func(in int i)
> {...}
> 
> vs
> 
> void func(const int i)
> {...}
> 
> Thanks

Currently, I think that 'const' and 'in' are the same.  While 'final' is 
not implemented, and I can't recall what it was supposed to do.