Uncallable delegates

[Dukc]

On Saturday, 16 May 2026 at 07:47:36 UTC, Meta wrote:
> Currently immutable(int* delegate()) means that d.funcptr is 
> immutable, but d.context is still mutable. So my suggestion is 
> that it also make d.context immutable. This would disallow the 
> code with UB that you outlined, because:

This was my original intention when I opened the thread in the 
ideas forum, and it is mentioned in the alternatives section of 
the DIP.

Quirin Schroll and Nick Treleaven found it unworkable though. See 
especially [this 
post](https://forum.dlang.org/reply/egsorgodxgyswhzrnivf@forum.dlang.org).