Generic collection/element function signatures in D2 versus D1

[Jacob Carlborg]

On 2010-09-07 14:49, Steven Schveighoffer wrote:
> On Sun, 05 Sep 2010 09:40:59 -0400, BLS <windevguy at hotmail.de> wrote:
>
>> On 05/09/2010 02:16, Jonathan M Davis wrote:
>>> void foo(T)(T[] collection, T elem)
>>>> {
>>>> // Blah, whatever
>>>> }
>>>>
>>
>> I am curious, how this will look and feel once inout is working ?
>>
>> inout void foo(T)(inout(T)[] collection, inout T elem)
>> {
>> // Blah, whatever}
>> }
>>
>
> inout void doesn't make any sense. You can't have a const void or
> immutable void.
>
> Now, if foo is a member function, then inout applies to the "this"
> pointer, but even then, you need a return type other than void for inout
> to be used.
>
> -Steve

inout is only used when you want to return the same constness (mutable, 
const, immutable) as you passed in to the function. If you don't want 
that, or don't want to return anything then const(T)[] is what you want. 
It will accept mutable, const and immutable.

-- 
/Jacob Carlborg