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

[Lars T. Kyllingstad]

On Sun, 30 May 2010 08:15:50 +0200, Don wrote:

> div0 wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>> 
>> Lars T. Kyllingstad wrote:

[...]

>>>   // According to the spec, 'in' is shorthand for 'const scope'. void
>>>   foo(in char[] d) { ... }
>> 
>> d is const (read only).
>> I've no idea why scope is mentioned, it's meaningless in the context of
>> function arguments.
> 
> I think in one of the early, complicated versions of the const system,
> it meant something. Looks like this mention of it was accidentally left
> in the spec.

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.

-Lars