Re: using Unsized Arrays in Structures from d?

[ag0aep6g via Digitalmars-d-learn]

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]`.