Let's not make invariants const

[Jakob Ovrum]

On Friday, 3 August 2012 at 19:19:24 UTC, Alex Rønne Petersen 
wrote:
> Does anyone else find this behavior too strict?

Yes. Sounds like yet another case of forcing bitwise const on 
something that should only be logically const.

Please stop forcing bitwise constancy on everything. Not 
everything needs to work with immutable, it should be opt-in 
(which in this case could mean explicitly marking the invariant 
as const) for any type.