How to fake a const method ?

[Basile B.]

On Friday, 9 March 2018 at 13:54:07 UTC, Basile B. wrote:
> On Friday, 9 March 2018 at 13:47:34 UTC, Basile B. wrote:
>> - `type()` really has to be const because it's used in an 
>> opEquals that's used by an AA (key is const so opEquals has to 
>> as well)
>
> And the most annoying is that the non reduced Foo has a custom 
> toHash that hashes a payload so the cast to const would really 
> be perfectly valid.

Other annoying fact:

     https://run.dlang.io/is/pmPSGr

It used to be accepted from 2.061 to 2.071.2