Best practices for logical const

[Stanislav Blinov]

On Sunday, 16 February 2014 at 06:28:45 UTC, Jonathan M Davis 
wrote:
> On Sunday, February 16, 2014 03:25:08 Stanislav Blinov wrote:
>> On Saturday, 15 February 2014 at 04:03:51 UTC, Adam D. Ruppe
>> wrote:
>> 
>> What about a library solution for something like C++-esque
>> mutable?
>
> You're casting away const if you do that, and that's precisely 
> what you shouldn't be doing. const is for _physical_ constness 
> and should never be used if you want logical constness...

I hear you. In this case, one might ask why casting away const is 
allowed at all :)