Anything like C99 compound literals in D?

[Seb]

On Friday, 9 February 2018 at 12:14:52 UTC, John Burton wrote:
> This is just an example...
>
> In windows WNDCLASS is a struct and RegisterClass is a function 
> that takes a pointer to an instance of that class.
>
> In C99 I can use "compound literals" to write this and have it 
> construct an instance of that struct on the stack, set the 
> values I've initialized, and default the rest of the struct 
> members to zero. (There are many other members I just want to 
> set to zero)
>
> RegisterClass(&(WNDCLASS) {
>     .hInstance = GetModuleHandle(NULL),
>     .lpszClassName = "Hello",
>     .lpfnWndProc = DefWindowProc
> });
>
> I find this very handy in my own code too. The syntax is very 
> nice.
> Is there any similar feature in D? (or a clean way to do this 
> kind of thing)

Selective struct initialization works in D:

MyStruct s = {
    a: "aa",
    b: 1,
}

Though not in-place, but there's already a DIP in the queue:

https://github.com/dlang/DIPs/pull/71

We just need to get the DIP in its final shape (and maybe 
super-charge it with an actual DMD PR).