It took me a while to narrow this down:

struct Foo
{
    int val = int.init;
    this(inout(int) nval) inout {
        this.val = nval;
    }
}

test.d(18): Error: cannot modify const/immutable/inout expression this.val

Is there any special reason why this should be disallowed? I mean the same thing happens if you do a void initialization: int val = void;

A bug?

On 03/11/2012 02:46 AM, Andrej Mitrovic wrote:
> It took me a while to narrow this down:
>
> struct Foo
> {
>      int val = int.init;
>      this(inout(int) nval) inout {
>          this.val = nval;
>      }
> }
>
> test.d(18): Error: cannot modify const/immutable/inout expression this.val
>
> Is there any special reason why this should be disallowed? I mean the
> same thing happens if you do a void initialization: int val = void;
>
> A bug?

That a void-initialized field cannot be initialized is certainly a bug.