Why use .init for associative arrays?

[Robert Fraser]

Possibly related to this:
http://d.puremagic.com/issues/show_bug.cgi?id=1315

Try with a runtime value.

Gilles G. Wrote:

> Hello,
> I am just wondering why we should use init for associative arrays of structs. See this code for example:
>     struct S
>     {
>         int nb;
>     }
>     void main()
>     {
>         S[char[]] aa; // associative array of struct S
>         aa["this_is_good"] = S.init;
>         aa["this_is_good"].nb = 1;      // all right
>         aa["this_is_an_error"].nb = 1; // runtime error, compiles fine...
>     }
> 
> I can't see a use case for _not_ using init before accessing a new key, so why do we have to explicitely use S.init?
> Why does this code compile fine (it gives an access violation error at runtime), shouldn't it always give an error?
> 
> Regards.
> 
> --
> Gilles
>