mutable keyword

[Jack Applegame via Digitalmars-d-learn]

On Friday, 20 May 2016 at 20:46:18 UTC, Jonathan M Davis wrote:
> Casting away const and mutating is undefined behavior in D. No 
> D program should ever do it.
Really? Mutating immutable is UB too, but look at 
std.typecons.Rebindable.