using Unsized Arrays in Structures from d?

[NewUser]

On Friday, 4 May 2018 at 15:37:28 UTC, ag0aep6g wrote:
> On Friday, 4 May 2018 at 13:02:08 UTC, NewUser wrote:
>> How can I use the following c structure from d.
>>
>> struct Item
>> {
>>   int id;
>> };
>>
>> struct Group
>> {
>>   int i;
>>   int item_count;
>>   struct Item items[];
>> };
>>
>> tried defining items[] as both "Item[] items" and "Item* 
>> items" in d, it compiles okay but gives an error when trying 
>> to access it.
>>
>> Here is the error.
>> object.Error@(0): Access Violation
>
> In the C code, the elements of `items` are directly part of the 
> struct. There is no indirection. D doesn't have dedicated 
> syntax for this, but you can hint at it with a zero-sized array:
>
> struct Group
> {
>     int i;
>     int item_count;
>     Item[0] items;
> }
>
> Then access an item with `group.items.ptr[index]`.

Hi ag0aep6g,

Thanks a lot for that.

I should have thought of that (i would still have missed the .ptr 
part), the old c syntax for the same thing used to be "Item 
items[0]".

Thanks,
NewUser