cast()x - a valid expression?

[Andrej Mitrovic]

It seems to do even more than that:

    int a;
    const int b;
    immutable int c;
    shared int d;
    shared(const int) e;

    static assert(is(typeof(cast()a) == int));
    static assert(is(typeof(cast()b) == int));
    static assert(is(typeof(cast()c) == int));
    static assert(is(typeof(cast()d) == int));
    static assert(is(typeof(cast()e) == int));

Talk about stealing the storm from std.traits.Unqual..

On 6/1/11, KennyTM~ <kennytm at gmail.com> wrote:
> While checking the Phobos source I've found an interesting expression
>
>        cast()(result[i]) = to!(E)(e);
>
> The 'cast()' means 'cast to mutable', e.g.
>
>        class S {}
>        void g(S x) {}
>        void main() {
>           const S s;
>           g(cast()s);
>        }
>
> But this is not documented in the D spec (CastParam cannot be empty). Is
> this an "accept-invalid" bug, or just a feature not yet documented?
>
>