http://wiki.dlang.org/DIP85

This DIP proposes an officially sanctioned way to initialize const members (or mutable members of const structs) lazily by allowing limited mutation of const objects.

Destroy!

On Saturday, 14 November 2015 at 14:30:33 UTC, Marc Schütz wrote:
> http://wiki.dlang.org/DIP85
>
> This DIP proposes an officially sanctioned way to initialize const members (or mutable members of const structs) lazily by allowing limited mutation of const objects.
>
> Destroy!

I'm just right now reading Andrei's post on persistent lists, and I realize it can be even more useful if it supports immutable objects. I made some modifications to allow that.