std.variant and const

[Lutger]

Jonathan M Davis wrote:

> On Saturday 07 August 2010 05:42:53 Lutger wrote:
>> Variant in phobos doesn't work well with being const, toHash and opEquals
>> for example are not marked as const methods. I have tried to work around
>> it with careful casting, but it is too unsafe and just too complex for
>> something that is supposed to make life easier.
>> 
>> Does anybody know if this is a temporary problem with variant itself or
>> related to other bugs or limitations? Should I file a bug report for this?
>> I could only find this: http://d.puremagic.com/issues/show_bug.cgi?id=3795
> 
> The fact that Object is not const-correct is a huge problem.
> http://d.puremagic.com/issues/show_bug.cgi?id=1824 covers that, but I don't
> know when it's going to be fixed.
> http://d.puremagic.com/issues/show_bug.cgi?id=3748 which deals with inout
> probably has to be fixed first.
> 
> So, I don't know whether there's really an issue with Variant itself, but the
> fact that functions like toHash() opEquals() aren't const is a big problem
> which is supposed to be addressed at some point but hasn't yet.
> 
> - Jonathan M Davis

Ouch. Thanks for the intel.