const/immutable on delegates

[deadalnix via Digitalmars-d]

On Friday, 3 July 2015 at 00:26:40 UTC, Tofu Ninja wrote:
> So this idea spawned from a thread I posted over in learn[1]. 
> Similar to how you can mark a member function as const or 
> immutable, there should be a way to mark a delegate as const or 
> immutable.
>

http://wiki.dlang.org/DIP30