mutable array of immutable objects

[Sönke Ludwig via Digitalmars-d]

Am 19.04.2016 um 12:41 schrieb Jeff Thompson:
> I want to create a mutable array of immutable objects, but the code
> below gives the error shown below. It seems that "new immutable(C)[1]"
> makes the entire array immutable, but it seems I should be able to
> change the elements of an array of pointers to an object even though the
> objects are immutable. How to do that?
>
> class C {
>    this(int x) immutable { this.x = x; }
>    int x;
> }
>
> void main(string[] args)
> {
>    auto array = new immutable(C)[1];
>    array[0] = new immutable C(10); // Error: Cannot modify immutable
> expression array[0].
> }
>

Due to an omission in the type system, this requires the use of the 
helper type std.typecons.Rebindable:

     auto array = new Rebindable!(immutable(C))[1];
     array[0] = new immutable C(10);