D with experimental features like tuple unpacking

[Tobias Pankrath]

On Friday, 22 March 2013 at 13:41:31 UTC, renoX wrote:
>> The fact that you sort of can't easily index tuple of 3 ints 
>> as a fixed array of 3 ints is a clear indication of a tendency 
>> that I find disturbing.
>
> But there is a reason for this: tuple/structs can contain 
> heterogeneous type whereas array contains only homogeneous 
> type..
> So if you want to index a tuple/struct of say {int,int[128]} 
> you have to build an array of pointers to these index, possible 
> but clearly not free..
> So I wouldn't agree that tuple/struct are 'trivially 
> substitutable' to array..

No. A tuple is by definition an ordered, finite sequence of 
elements. There is no problem to index that.

tuple a = {
    5;
    true;
    0.1
}
is(typeof(a[0]) == int)
is(typeof(a[1]) == bool)