std.variant and const

[Lutger]

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